commit 0ac06f67509bc930502e336980b67920614ec10e
Author: Victor <melnikukr@mail.ru>
Date:   Sat Aug 24 15:47:48 2013 +0300

    Version 1.3

diff --git a/.gitignore b/.gitignore
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+++ b/.gitignore
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+.classpath
+.cproject
+.project
+assets/
+bin/
+gen/
+obj/
+tmp/
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diff --git a/AndroidManifest.xml b/AndroidManifest.xml
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+++ b/AndroidManifest.xml
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+<?xml version="1.0" encoding="UTF-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.annimon.playlisteditor"
+    android:versionCode="4"
+    android:versionName="1.3" >
+
+    <uses-sdk
+        android:minSdkVersion="5"
+        android:targetSdkVersion="17" />
+    
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WRITE_INTERNAL_STORAGE" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@drawable/ic_launcher"
+        android:label="@string/app_name"
+        android:theme="@style/AppTheme" >
+        
+        <activity
+            android:name=".SelectPlaylistActivity"
+            android:label="@string/app_name"
+            android:screenOrientation="landscape" >
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+        
+        <activity
+            android:name=".EditPlaylistActivity"
+            android:label="@string/app_name"
+            android:screenOrientation="landscape"
+            android:theme="@style/AppTheme.NoTitleBar" />
+        
+        <activity
+            android:name="com.google.ads.AdActivity"
+            android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" />
+        
+    </application>
+
+</manifest>
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diff --git a/ic_launcher-web.png b/ic_launcher-web.png
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diff --git a/libs/GoogleAdMobAdsSdk-6.2.1.jar b/libs/GoogleAdMobAdsSdk-6.2.1.jar
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diff --git a/proguard-project.txt b/proguard-project.txt
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+++ b/proguard-project.txt
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+@E:\\SETUPS\\Disk\\Programming\\Java\\android.pro
+-obfuscationdictionary E:\\SETUPS\\Disk\\Programming\\Java\\compact.txt
+-optimizationpasses 9
+-allowaccessmodification
+-overloadaggressively
+#-keep public class android.support.**
+
+# Ad Mob
+#-keep class com.google.ads.AdActivity { <init>(...); }
+#-keep class com.google.ads.AdView { <init>(...); }
+-dontwarn com.google.ads.**
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diff --git a/project.properties b/project.properties
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+++ b/project.properties
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+# This file is automatically generated by Android Tools.
+# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
+#
+# This file must be checked in Version Control Systems.
+#
+# To customize properties used by the Ant build system edit
+# "ant.properties", and override values to adapt the script to your
+# project structure.
+#
+# To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home):
+proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
+
+# Project target.
+target=android-17
diff --git a/res/anim/slide_left_in.xml b/res/anim/slide_left_in.xml
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+++ b/res/anim/slide_left_in.xml
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+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android" >
+
+    <translate
+        android:duration="@integer/transition_duration"
+        android:fromXDelta="100%p"
+        android:toXDelta="0" />
+
+</set>
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diff --git a/res/anim/slide_left_out.xml b/res/anim/slide_left_out.xml
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+++ b/res/anim/slide_left_out.xml
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+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android" >
+
+    <translate
+        android:duration="@integer/transition_duration"
+        android:fromXDelta="0"
+        android:toXDelta="-100%p" />
+
+</set>
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diff --git a/res/anim/slide_right_in.xml b/res/anim/slide_right_in.xml
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+++ b/res/anim/slide_right_in.xml
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+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android" >
+
+    <translate
+        android:duration="@integer/transition_duration"
+        android:fromXDelta="-100%p"
+        android:toXDelta="0" />
+
+</set>
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diff --git a/res/anim/slide_right_out.xml b/res/anim/slide_right_out.xml
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--- /dev/null
+++ b/res/anim/slide_right_out.xml
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+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android" >
+
+    <translate
+        android:duration="@integer/transition_duration"
+        android:fromXDelta="0"
+        android:toXDelta="100%p" />
+
+</set>
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diff --git a/res/drawable-hdpi/ic_launcher.png b/res/drawable-hdpi/ic_launcher.png
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diff --git a/res/drawable-hdpi/ic_new.png b/res/drawable-hdpi/ic_new.png
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diff --git a/res/drawable-ldpi/ic_launcher.png b/res/drawable-ldpi/ic_launcher.png
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diff --git a/res/drawable-mdpi/ic_launcher.png b/res/drawable-mdpi/ic_launcher.png
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diff --git a/res/drawable-mdpi/ic_new.png b/res/drawable-mdpi/ic_new.png
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diff --git a/res/drawable-xhdpi/ic_launcher.png b/res/drawable-xhdpi/ic_launcher.png
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diff --git a/res/drawable-xhdpi/ic_new.png b/res/drawable-xhdpi/ic_new.png
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diff --git a/res/drawable/background.xml b/res/drawable/background.xml
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--- /dev/null
+++ b/res/drawable/background.xml
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+<?xml version="1.0" encoding="utf-8"?>
+<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
+    android:dither="true"
+    android:src="@drawable/notes_bg_tile_white"
+    android:tileMode="repeat" />
diff --git a/res/drawable/notes_bg_tile_white.png b/res/drawable/notes_bg_tile_white.png
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diff --git a/res/layout/dialog_name.xml b/res/layout/dialog_name.xml
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+++ b/res/layout/dialog_name.xml
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+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical" >
+    
+    <EditText 
+        android:id="@+id/dialogPlaylistName"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:hint="@string/enter_name"
+        android:inputType="text"
+        android:maxLength="@integer/maxPlaylistName"
+        android:singleLine="true" />
+    
+    <Button 
+        android:id="@+id/dialogOk"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@android:string/ok" />
+
+</LinearLayout>
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diff --git a/res/layout/main.xml b/res/layout/main.xml
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--- /dev/null
+++ b/res/layout/main.xml
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+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical" >
+
+    <ListView
+        android:id="@android:id/list"
+        android:layout_alignParentTop="true"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+    
+    <com.google.ads.AdView
+        android:id="@+id/adView"
+        android:layout_alignParentBottom="true"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        ads:adSize="BANNER"
+        ads:adUnitId="a1510ae00ecc03d"
+        ads:loadAdOnCreate="true"
+        ads:backgroundColor="#282828"
+        ads:primaryTextColor="#FFFFFF"
+        ads:secondaryTextColor="#D7D7D7" />
+
+</RelativeLayout>
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diff --git a/res/layout/playlist_editor.xml b/res/layout/playlist_editor.xml
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+++ b/res/layout/playlist_editor.xml
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+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:baselineAligned="false"
+    android:orientation="vertical" >
+
+    <RelativeLayout
+        android:layout_width="match_parent"
+        android:layout_height="33dp"
+        android:orientation="horizontal" >
+        
+        <Spinner
+            android:id="@+id/sourceSpinner"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentLeft="true"
+            android:layout_alignParentTop="true" />
+
+        <Button
+            style="?android:attr/buttonStyleSmall"
+            android:id="@+id/saveButton"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentRight="true"
+            android:layout_alignParentTop="true"
+            android:layout_marginRight="5dp"
+            android:background="@null"
+            android:drawableLeft="@android:drawable/ic_menu_save"
+            android:text="@string/save_playlist" />
+        
+    </RelativeLayout>
+
+	<LinearLayout
+	    android:background="@drawable/background"
+	    android:layout_width="match_parent"
+	    android:layout_height="match_parent"
+	    android:orientation="horizontal" >
+	
+	      <ListView
+	          android:id="@+id/sourcelist"
+	          android:layout_width="0dp"
+	          android:layout_height="match_parent"
+	          android:layout_weight="1"
+	          android:choiceMode="singleChoice" />
+	      
+	      <ListView
+	          android:id="@+id/resultlist"
+	          android:layout_width="0dp"
+	          android:layout_height="match_parent"
+	          android:layout_weight="1" />
+	
+	</LinearLayout>
+</LinearLayout>
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diff --git a/res/menu/main.xml b/res/menu/main.xml
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+++ b/res/menu/main.xml
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+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android" >
+
+    <item android:id="@+id/menu_new_playlist"
+        android:showAsAction="always|withText"
+        android:title="@string/new_playlist"
+        android:icon="@drawable/ic_new" />
+    
+    <item android:id="@+id/menu_restore_playlist"
+        android:showAsAction="never"
+        android:title="@string/restore_playlist" />
+
+</menu>
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diff --git a/res/menu/main_context.xml b/res/menu/main_context.xml
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--- /dev/null
+++ b/res/menu/main_context.xml
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+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android" >
+    
+    <item android:id="@+id/menu_delete_playlist"
+        android:showAsAction="ifRoom|withText"
+        android:title="@string/delete"
+        android:icon="@android:drawable/ic_menu_delete" />
+    
+    <item android:id="@+id/menu_rename_playlist"
+        android:showAsAction="ifRoom|withText"
+        android:title="@string/rename"
+        android:icon="@android:drawable/ic_menu_edit" />
+    
+    <item android:id="@+id/menu_backup_playlist"
+        android:showAsAction="never"
+        android:title="@string/backup_playlist" />
+
+</menu>
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diff --git a/res/values-ru/strings.xml b/res/values-ru/strings.xml
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+++ b/res/values-ru/strings.xml
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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    
+    <string name="app_name">Playlist Editor</string>
+    <string name="new_playlist">Создать плейлист</string>
+    <string name="save_playlist">Сохранить плейлист</string>
+    <string name="backup_playlist">Резервная копия плейлиста</string>
+    <string name="restore_playlist">Восстановить плейлист</string>
+    <string name="delete">Удалить</string>
+    <string name="rename">Переименовать</string>
+    <string name="enter_name">Введите имя</string>
+    <string name="done">Готово!</string>
+    <string name="all_tracks">Все треки</string>
+    
+    <!-- Errors, messages etc -->
+    <string name="error_while_restore_backup">Ошибка при восстановлении резервной копии</string>
+    <string name="unable_to_store_backup">Невозможно сохранить резервную копию</string>
+    <string name="empty_backup_list">Пустой список резервных копий</string>
+    
+</resources>
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diff --git a/res/values-v11/styles.xml b/res/values-v11/styles.xml
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+++ b/res/values-v11/styles.xml
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+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <!-- Application and activity styles -->
+    <style name="AppBaseTheme" parent="android:Theme.Holo.Light" />
+    
+    <style name="AppTheme.NoTitleBar">
+        <item name="android:windowNoTitle">true</item>
+        <item name="android:windowActionBar">false</item>
+    </style>
+    
+</resources>
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diff --git a/res/values/integers.xml b/res/values/integers.xml
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--- /dev/null
+++ b/res/values/integers.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <integer name="transition_duration">400</integer>
+    <integer name="maxPlaylistName">50</integer>
+</resources>
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diff --git a/res/values/strings.xml b/res/values/strings.xml
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+++ b/res/values/strings.xml
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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <string name="app_name">Playlist Editor</string>
+    <string name="new_playlist">New playlist</string>
+    <string name="save_playlist">Save playlist</string>
+    <string name="backup_playlist">Backup playlist</string>
+    <string name="restore_playlist">Restore playlist</string>
+    <string name="delete">Delete</string>
+    <string name="rename">Rename</string>
+    <string name="enter_name">Enter name</string>
+    <string name="done">Done!</string>
+    <string name="all_tracks">All tracks</string>
+    
+    <!-- Errors, messages etc -->
+    <string name="error_while_restore_backup">Error while restore backup</string>
+    <string name="unable_to_store_backup">Unable to store backup</string>
+    <string name="empty_backup_list">Empty backup list</string>
+
+</resources>
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diff --git a/res/values/styles.xml b/res/values/styles.xml
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+++ b/res/values/styles.xml
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+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <!-- Application and activity styles -->
+    <style name="AppBaseTheme" parent="android:Theme.Light" />
+    
+    <style name="AppTheme" parent="AppBaseTheme">
+        <item name="android:windowFullscreen">true</item>
+    </style>
+    
+    <style name="AppTheme.NoTitleBar">
+        <item name="android:windowNoTitle">true</item>
+    </style>
+    
+</resources>
\ No newline at end of file
diff --git a/src/com/annimon/playlisteditor/EditPlaylistActivity.java b/src/com/annimon/playlisteditor/EditPlaylistActivity.java
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--- /dev/null
+++ b/src/com/annimon/playlisteditor/EditPlaylistActivity.java
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+package com.annimon.playlisteditor;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import android.annotation.SuppressLint;
+import android.app.Activity;
+import android.os.Build;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.AdapterView.OnItemLongClickListener;
+import android.widget.ArrayAdapter;
+import android.widget.Button;
+import android.widget.ListView;
+import android.widget.Spinner;
+import com.annimon.playlisteditor.data.Playlist;
+import com.annimon.playlisteditor.data.Track;
+
+/**
+ * Edit playlist window.
+ * @author aNNiMON
+ */
+public class EditPlaylistActivity extends Activity {
+    
+    public static final String PLAYLIST_ID = "playlist_id";
+    public static final String PLAYLIST_NAME = "playlist_name";
+    
+    private Track bufferItem;
+    private TracksAdapter sourceAdapter, resultAdapter;
+    private ArrayAdapter<Playlist> srcPlaylistAdapter;
+    
+    @SuppressLint("NewApi")
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.playlist_editor);
+        
+        initPlaylistSpinner();
+        
+        ((Button) findViewById(R.id.saveButton)).setOnClickListener(
+                new View.OnClickListener() {
+            
+            @Override
+            public void onClick(View v) {
+                savePlaylist();
+            }
+        });
+        
+        bufferItem = null;
+        
+        int playlistId = getIntent().getIntExtra(PLAYLIST_ID, -1);
+        Track[] tracks = PlaylistDatabase.getTracks(this, playlistId);
+        int resource = android.R.layout.simple_list_item_1;
+        resultAdapter = new TracksAdapter(this, resource,
+                (playlistId == -1) ? new Track[0] : tracks);
+        ListView listResult = (ListView) findViewById(R.id.resultlist);
+        listResult.setAdapter(resultAdapter);
+        listResult.setOnItemClickListener(destItemClick);
+        listResult.setOnItemLongClickListener(destLongItemClick);
+    }
+    
+    @Override
+    public void onBackPressed() {
+        super.onBackPressed();
+        setSlidingTransition();
+    }
+    
+    private void initPlaylistSpinner() {
+        Playlist[] playlists = PlaylistDatabase.getPlaylists(this);
+        List<Playlist> list = new ArrayList<Playlist>();
+        list.add(new Playlist(-1, getString(R.string.all_tracks)));
+        list.addAll(Arrays.asList(playlists));
+        
+        Spinner sourceSpinner = (Spinner) findViewById(R.id.sourceSpinner);
+        srcPlaylistAdapter = new ArrayAdapter<Playlist>(this,
+                android.R.layout.simple_spinner_item, list);
+        srcPlaylistAdapter.setDropDownViewResource(
+                android.R.layout.simple_spinner_dropdown_item);
+        sourceSpinner.setAdapter(srcPlaylistAdapter);
+        
+        sourceSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
+
+            @Override
+            public void onItemSelected(AdapterView<?> p, View v, int pos, long id) {
+                int playlistId = srcPlaylistAdapter.getItem(pos).getId();
+                addTracksToSourceList(playlistId);
+            }
+
+            @Override
+            public void onNothingSelected(AdapterView<?> arg0) {
+                int playlistId = getIntent().getIntExtra(PLAYLIST_ID, -1);
+                addTracksToSourceList(playlistId);
+            }
+        });
+    }
+    
+    private void addTracksToSourceList(int playlistId) {
+        Track[] tracks = PlaylistDatabase.getTracks(this, playlistId);
+        int resource = android.R.layout.simple_list_item_single_choice;
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
+            resource = android.R.layout.simple_list_item_activated_1;
+        }
+        sourceAdapter = new TracksAdapter(this, resource, tracks);
+        ListView listSource = (ListView) findViewById(R.id.sourcelist);
+        listSource.setAdapter(sourceAdapter);
+        listSource.setOnItemClickListener(srcItemClick);
+    }
+    
+    /**
+     * Allow user to enter name of saving playlist.
+     */
+    private void savePlaylist() {
+        PlaylistNameDialog dialog = new PlaylistNameDialog(this) {
+            
+            @Override
+            protected void onClick(String playlistName) {
+                savePlaylist(playlistName);
+                // Exit window.
+                setResult(RESULT_OK);
+                finish();
+                setSlidingTransition();
+            }
+        };
+        dialog.setTitle(R.string.save_playlist);
+        if (getIntent().getIntExtra(PLAYLIST_ID, -1) != -1) {
+            String playlistName = getIntent().getStringExtra(PLAYLIST_NAME) + "_pe";
+            dialog.setName(playlistName);
+        }
+        dialog.show();
+    }
+    
+    /**
+     * Saves track order into new playlist.
+     */
+    private void savePlaylist(String playlistName) {
+        int[] trackIds = new int[resultAdapter.getCount()];
+        for (int i = 0; i < trackIds.length; i++) {
+            trackIds[i] = resultAdapter.getItem(i).getAudioId();
+        }
+        PlaylistDatabase.createPlaylist(this, playlistName, trackIds);
+    }
+    
+    /**
+     * Slide out layout when close screen.
+     */
+    private void setSlidingTransition() {
+        overridePendingTransition(R.anim.slide_right_in, R.anim.slide_right_out);
+    }
+    
+    /**
+     * Select item for copy into destination list.
+     * Because it's no way to add item to empty destination list,
+     * we need automatically add it.
+     * */
+    private OnItemClickListener srcItemClick = new OnItemClickListener() {
+
+        @Override
+        public void onItemClick(AdapterView<?> p, View v, int pos, long id) {
+            bufferItem = sourceAdapter.getItem(pos);
+            if (resultAdapter.isEmpty()) {
+                resultAdapter.addTrack(1, bufferItem);
+            }
+        }
+    };
+    
+    /** Add item from source list by clicking on destination list. */
+    private OnItemClickListener destItemClick = new OnItemClickListener() {
+
+        @Override
+        public void onItemClick(AdapterView<?> p, View v, int pos, long id) {
+            if (bufferItem != null) {
+                resultAdapter.addTrack(pos, bufferItem);
+            }
+        }
+    };
+    
+    /** Remove item on long click in destination list. */
+    private OnItemLongClickListener destLongItemClick = new OnItemLongClickListener() {
+
+        @Override
+        public boolean onItemLongClick(AdapterView<?> p, View v, int pos, long id) {
+            resultAdapter.removeTrack(pos);
+            return true;
+        }
+        
+    };
+}
diff --git a/src/com/annimon/playlisteditor/ExceptionHandler.java b/src/com/annimon/playlisteditor/ExceptionHandler.java
new file mode 100644
index 0000000..e7eb55c
--- /dev/null
+++ b/src/com/annimon/playlisteditor/ExceptionHandler.java
@@ -0,0 +1,61 @@
+package com.annimon.playlisteditor;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.util.Log;
+
+/**
+ * Handling exceptions.
+ * If error is critical or must be show to user, then
+ * call <b>alert</b> method. 
+ * In other situations call <b>log</b> method.
+ *
+ * @author aNNiMON
+ */
+public class ExceptionHandler {
+    
+    private static final boolean DEBUG = false;
+    private static final String TAG = "ExceptionHandler";
+    
+    public static void alert(Context context, Exception ex) {
+        alert(context, getErrorMessage(ex));
+    }
+    
+    public static void alert(Context context, int resourceId) {
+        alert(context, context.getString(resourceId));
+    }
+    
+    public static void alert(Context context, String message) {
+        new AlertDialog.Builder(context)
+            .setIcon(android.R.drawable.ic_dialog_alert)
+            .setTitle(android.R.string.dialog_alert_title)
+            .setMessage(message)
+            .setPositiveButton(android.R.string.ok,
+                    new DialogInterface.OnClickListener() {
+
+                        @Override
+                        public void onClick(DialogInterface dialog, int which) {
+                            dialog.dismiss();
+                        }
+
+            }).show();
+    }
+    
+    public static void log(Exception ex) {
+        if (DEBUG) {
+            Log.e(TAG, getErrorMessage(ex));
+        }
+    }
+    
+    public static void log(String message) {
+        if (DEBUG) {
+            Log.e(TAG, message);
+        }
+    }
+
+    private static String getErrorMessage(Exception ex) {
+        return ex.getMessage();
+    }
+
+}
diff --git a/src/com/annimon/playlisteditor/PlaylistBackup.java b/src/com/annimon/playlisteditor/PlaylistBackup.java
new file mode 100644
index 0000000..c404975
--- /dev/null
+++ b/src/com/annimon/playlisteditor/PlaylistBackup.java
@@ -0,0 +1,75 @@
+package com.annimon.playlisteditor;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import com.annimon.playlisteditor.data.BackupFile;
+import com.annimon.playlisteditor.data.Playlist;
+import android.content.Context;
+
+
+public class PlaylistBackup {
+    
+    private static final String BACKUP_EXT = ".bpe";
+    
+    private Context context;
+
+    public PlaylistBackup(Context context) {
+        this.context = context;
+    }
+    
+    public void backup(Playlist playlist) throws IOException {
+        String playlistName = playlist.getName();
+        int playlistId = playlist.getId();
+        
+        String filename = String.valueOf(playlistName.hashCode()) + BACKUP_EXT;
+        FileOutputStream fos = context.openFileOutput(filename, Context.MODE_PRIVATE);
+        DataOutputStream dos = new DataOutputStream(fos);
+        PlaylistDatabase.backupPlaylist(context, playlistName, playlistId, dos);
+        dos.flush();
+        dos.close();
+    }
+    
+    public void restore(BackupFile backup) throws IOException {
+        FileInputStream fis = context.openFileInput(backup.getFilename());
+        DataInputStream dis = new DataInputStream(fis);
+        PlaylistDatabase.restorePlaylist(context, dis);
+        dis.close();
+    }
+    
+    public List<BackupFile> list() throws IOException {
+        String[] filelist = context.fileList();
+        int length = filelist.length;
+        List<BackupFile> backups = new ArrayList<BackupFile>(length);
+        
+        for (int i = 0; i < length; i++) {
+            if (filelist[i].endsWith(BACKUP_EXT)) {
+                String playlistName = getPlaylistName(filelist[i]);
+                backups.add( new BackupFile(filelist[i], playlistName) );
+            }
+        }
+        
+        return backups;
+    }
+    
+    public void delete(String filename) {
+        File file = context.getFileStreamPath(filename);
+        if (file != null) {
+            file.delete();
+        }
+    }
+    
+    private String getPlaylistName(String filename) throws IOException {
+        FileInputStream fis = context.openFileInput(filename);
+        DataInputStream dis = new DataInputStream(fis);
+        String name = dis.readUTF();
+        dis.close();
+        
+        return name;
+    }
+}
diff --git a/src/com/annimon/playlisteditor/PlaylistDatabase.java b/src/com/annimon/playlisteditor/PlaylistDatabase.java
new file mode 100644
index 0000000..8be01ec
--- /dev/null
+++ b/src/com/annimon/playlisteditor/PlaylistDatabase.java
@@ -0,0 +1,194 @@
+package com.annimon.playlisteditor;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import com.annimon.playlisteditor.data.Playlist;
+import com.annimon.playlisteditor.data.Track;
+import android.content.ContentResolver;
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.net.Uri;
+import android.provider.MediaStore;
+import android.text.TextUtils;
+
+
+public class PlaylistDatabase {
+    
+    public static void createPlaylist(Context context, String name, int[] trackIds) {
+        if (TextUtils.isEmpty(name)) return;
+        
+        ContentValues cv = new ContentValues();
+        cv.put(MediaStore.Audio.Playlists.NAME, name);
+        
+        ContentResolver resolver = context.getContentResolver();
+        Uri uri = resolver.insert(MediaStore.Audio.Playlists.getContentUri("external"), cv);
+        
+        int size = trackIds.length;
+        ContentValues[] values = new ContentValues[size];
+        for (int i = 0; i < size; i++) {
+            values[i] = new ContentValues();
+            values[i].put(MediaStore.Audio.Playlists.Members.PLAY_ORDER, i);
+            values[i].put(MediaStore.Audio.Playlists.Members.AUDIO_ID, trackIds[i]);
+        }
+        
+        resolver.bulkInsert(uri, values);
+    }
+    
+    public static void deletePlaylist(Context context, int playlistId) {
+        ContentResolver resolver = context.getContentResolver();
+        resolver.delete(MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI,
+                MediaStore.Audio.Playlists._ID +" = "+ playlistId, null);
+    }
+    
+    public static void renamePlaylist(Context context, int id, String name) {
+        ContentResolver resolver = context.getContentResolver();
+        ContentValues value = new ContentValues();
+        value.put(MediaStore.Audio.Playlists.NAME, name);
+        
+        resolver.update(MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI,
+                value, MediaStore.Audio.Playlists._ID +" = "+ id, null);
+    }
+    
+    public static void backupPlaylist(Context context, 
+            String playlistName, int playlistId,
+            DataOutputStream dos) throws IOException {
+        
+        dos.writeUTF(playlistName);
+        
+        String[] projection = {
+                MediaStore.Audio.Playlists.Members.AUDIO_ID
+        };
+        
+        Cursor tracksCursor = query(context,
+              MediaStore.Audio.Playlists.Members.getContentUri("external", playlistId),
+              projection, null);
+        
+        int size = tracksCursor.getCount();
+        dos.writeInt(size);
+        
+        tracksCursor.moveToFirst();
+        for (int i = 0; i < size; i++) {
+            int audioId = tracksCursor.getInt(0);
+            dos.writeInt(audioId);
+            
+            tracksCursor.moveToNext();
+        }
+    }
+    
+    public static void restorePlaylist(Context context,
+            DataInputStream dis) throws IOException {
+        
+        String playlistName = dis.readUTF();
+        
+        ContentValues cv = new ContentValues();
+        cv.put(MediaStore.Audio.Playlists.NAME, playlistName);
+        
+        ContentResolver resolver = context.getContentResolver();
+        Uri uri = resolver.insert(MediaStore.Audio.Playlists.getContentUri("external"), cv);
+        
+        int size = dis.readInt();
+        ContentValues[] values = new ContentValues[size];
+        for (int i = 0; i < size; i++) {
+            values[i] = new ContentValues();
+            values[i].put(MediaStore.Audio.Playlists.Members.PLAY_ORDER, i);
+            values[i].put(MediaStore.Audio.Playlists.Members.AUDIO_ID, dis.readInt());
+        }
+        
+        resolver.bulkInsert(uri, values);
+    }
+
+    public static Playlist[] getPlaylists(Context context) {
+        String[] projection = {
+                MediaStore.Audio.Playlists._ID,
+                MediaStore.Audio.Playlists.NAME
+        };
+        
+        Cursor playlistSDCardCursor = query(context,
+              MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI,
+              projection, projection[1]);
+        
+        int size = playlistSDCardCursor.getCount();
+        Playlist[] playlists = new Playlist[size];
+        
+        playlistSDCardCursor.moveToFirst();
+        for (int i = 0; i < size; i++) {
+            int id = playlistSDCardCursor.getInt(0);
+            String name = playlistSDCardCursor.getString(1);
+            playlists[i] = new Playlist(id, name);
+            
+            playlistSDCardCursor.moveToNext();
+        }
+        
+        return playlists;
+    }
+    
+    /**
+     * Get tracks of playlist. If playlistId equals -1 - return all tracks in system.
+     * @param context
+     * @param playlistId id of playlist, or -1.
+     * @return tracks array.
+     */
+    public static Track[] getTracks(Context context, long playlistId) {
+        String[] projection = {
+                (playlistId == -1) ?
+                        MediaStore.Audio.Media._ID :
+                        MediaStore.Audio.Playlists.Members.AUDIO_ID,
+                        
+                        MediaStore.Audio.Media.ARTIST,
+                        MediaStore.Audio.Media.TITLE
+        };
+        
+        Cursor tracksCursor;
+        if (playlistId == -1) {
+            // Get all tracks.
+            String selection = MediaStore.Audio.Media.IS_MUSIC + " != 0 ";
+            tracksCursor = query(context,
+                    MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
+                    projection, selection, null, null, 0);
+        } else {
+            // Get tracks of playlist.
+            tracksCursor = query(context,
+                  MediaStore.Audio.Playlists.Members.getContentUri("external", playlistId),
+                  projection, null);
+        }
+        
+        int size = tracksCursor.getCount();
+        Track[] tracks = new Track[size];
+        
+        tracksCursor.moveToFirst();
+        for (int i = 0; i < size; i++) {
+            int audioId = tracksCursor.getInt(0);
+            String artist = tracksCursor.getString(1);
+            String title = tracksCursor.getString(2);
+            tracks[i] = new Track(audioId, artist, title);
+            
+            tracksCursor.moveToNext();
+        }
+        
+        return tracks;
+    }
+    
+    private static Cursor query(Context context,
+            Uri uri, String[] projection, String sortOrder) {
+        return query(context, uri, projection, null, null, sortOrder, 0);
+    }
+    
+    private static Cursor query(Context context, Uri uri, String[] projection,
+             String selection, String[] selectionArgs, String sortOrder, int limit) {
+        try {
+            ContentResolver resolver = context.getContentResolver();
+            if (resolver == null) {
+                return null;
+            }
+            if (limit > 0) {
+                uri = uri.buildUpon().appendQueryParameter("limit", String.valueOf(limit)).build();
+            }
+            return resolver.query(uri, projection, selection, selectionArgs, sortOrder);
+        } catch (UnsupportedOperationException ex) {
+            ExceptionHandler.log(ex);
+            return null;
+        }
+    }
+}
diff --git a/src/com/annimon/playlisteditor/PlaylistNameDialog.java b/src/com/annimon/playlisteditor/PlaylistNameDialog.java
new file mode 100644
index 0000000..0659ddf
--- /dev/null
+++ b/src/com/annimon/playlisteditor/PlaylistNameDialog.java
@@ -0,0 +1,74 @@
+package com.annimon.playlisteditor;
+
+import android.app.Dialog;
+import android.content.Context;
+import android.text.Editable;
+import android.text.TextUtils;
+import android.text.TextWatcher;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+
+/**
+ * Custom dialog for enter playlist name.
+ * @author aNNiMON
+ */
+public abstract class PlaylistNameDialog implements View.OnClickListener {
+    
+    private Dialog dialog;
+    private EditText nameEditText;
+    private Button okButton;
+
+    public PlaylistNameDialog(Context context) {
+        dialog = new Dialog(context);
+        dialog.setCancelable(true);
+        dialog.setContentView(R.layout.dialog_name);
+        
+        nameEditText = (EditText) dialog.findViewById(R.id.dialogPlaylistName);
+        nameEditText.addTextChangedListener(editTextWatcher);
+        okButton = (Button) dialog.findViewById(R.id.dialogOk);
+        okButton.setOnClickListener(this);
+        okButton.setEnabled(false);
+    }
+    
+    public void setTitle(int resource) {
+        dialog.setTitle(resource);
+    }
+    
+    public void setName(String text) {
+        nameEditText.setText(text);
+        disableButtonIfTextEmpty();
+    }
+    
+    public void show() {
+        dialog.show();
+    }
+
+    @Override
+    public void onClick(View v) {
+        String name = nameEditText.getText().toString();
+        onClick(name);
+        dialog.dismiss();
+    }
+    
+    protected abstract void onClick(String name);
+    
+    private void disableButtonIfTextEmpty() {
+        
+        boolean textEmpty = TextUtils.isEmpty(nameEditText.getText().toString());
+        okButton.setEnabled(!textEmpty);
+    }
+
+    /** To avoid applying empty text we needs disable button on incorrect situation */
+    private TextWatcher editTextWatcher = new TextWatcher() {
+
+        public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
+
+        public void onTextChanged(CharSequence s, int start, int before, int count) { }
+
+        public void afterTextChanged(Editable editable) {
+            disableButtonIfTextEmpty();
+        }
+
+    };
+}
diff --git a/src/com/annimon/playlisteditor/SelectPlaylistActivity.java b/src/com/annimon/playlisteditor/SelectPlaylistActivity.java
new file mode 100644
index 0000000..b8d64ce
--- /dev/null
+++ b/src/com/annimon/playlisteditor/SelectPlaylistActivity.java
@@ -0,0 +1,325 @@
+package com.annimon.playlisteditor;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import android.annotation.SuppressLint;
+import android.app.AlertDialog;
+import android.app.ListActivity;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.os.Build;
+import android.os.Bundle;
+import android.view.ActionMode;
+import android.view.ContextMenu;
+import android.view.ContextMenu.ContextMenuInfo;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.AdapterView.OnItemLongClickListener;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+import android.widget.Toast;
+import com.annimon.playlisteditor.data.BackupFile;
+import com.annimon.playlisteditor.data.Playlist;
+
+/**
+ * Select playlist for edit.
+ * @author aNNiMON
+ */
+public class SelectPlaylistActivity extends ListActivity {
+    
+    private Object actionMode;
+    private ArrayAdapter<Playlist> adapter;
+    
+    private int selectedIndex;
+    
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.main);
+        
+        selectedIndex = -1;
+        
+        ListView listView = getListView();
+        listView.setBackgroundResource(R.drawable.background);
+        
+        getPlaylists();
+        listView.setOnItemClickListener(itemClickListener);
+        if (isNewApi()) {
+            listView.setOnItemLongClickListener(itemLongClickListener);
+        } else {
+            registerForContextMenu(listView);
+        }
+    }
+    
+    private final Context getContext() {
+        return SelectPlaylistActivity.this;
+    }
+    
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.main, menu);
+        return true;
+    }
+    
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch(item.getItemId()) {
+            case R.id.menu_new_playlist:
+                editPlaylist(-1, "");
+                break;
+            case R.id.menu_restore_playlist:
+                restorePlaylist();
+                break;
+        }
+        return true;
+    }
+    
+    @Override
+    protected void onActivityResult(int request, int result, Intent data) {
+        if (result == RESULT_OK) {
+            getPlaylists();
+        }
+    }
+    
+    private void getPlaylists() {
+        Playlist[] playlists = PlaylistDatabase.getPlaylists(this);
+        List<Playlist> list = new ArrayList<Playlist>();
+        list.addAll(Arrays.asList(playlists));
+        
+        adapter = new ArrayAdapter<Playlist>(this,
+                android.R.layout.simple_list_item_1, list);
+        
+        setListAdapter(adapter);
+    }
+    
+    private void editPlaylist(int playlistId, String playlistName) {
+        Intent intent = new Intent();
+        intent.setClass(getContext(), EditPlaylistActivity.class);
+        intent.putExtra(EditPlaylistActivity.PLAYLIST_ID, playlistId);
+        intent.putExtra(EditPlaylistActivity.PLAYLIST_NAME, playlistName);
+        startActivityForResult(intent, 1);
+        
+        overridePendingTransition(R.anim.slide_left_in, R.anim.slide_left_out);
+    }
+    
+    private void renamePlaylist(final int playlistId) {
+        PlaylistNameDialog dialog = new PlaylistNameDialog(this) {
+            
+            @Override
+            protected void onClick(String newPlaylistName) {
+                PlaylistDatabase.renamePlaylist(getContext(),
+                        playlistId, newPlaylistName);
+                // Update list of playlists.
+                getPlaylists();
+            }
+        };
+        dialog.setTitle(R.string.rename);
+        String playlistName = adapter.getItem(selectedIndex).getName();
+        dialog.setName(playlistName);
+        dialog.show();
+    }
+    
+    private void deletePlaylist(int playlistId) {
+        PlaylistDatabase.deletePlaylist(getContext(), playlistId);
+        // Update list of playlists.
+        getPlaylists();
+    }
+    
+    private void backupPlaylist(Playlist playlist) {
+        PlaylistBackup backup = new PlaylistBackup(getContext());
+        try {
+            backup.backup(playlist);
+            Toast.makeText(getContext(), getString(R.string.done), 
+                    Toast.LENGTH_LONG).show();
+        } catch (IOException ex) {
+            ExceptionHandler.alert(getContext(),
+                    R.string.unable_to_store_backup);
+        }
+    }
+    
+    private void restorePlaylist() {
+        final PlaylistBackup backup = new PlaylistBackup(getContext());
+        try {
+            final List<BackupFile> list = backup.list();
+            final int size = list.size();
+            if (size == 0) {
+                ExceptionHandler.alert(getContext(), R.string.empty_backup_list);
+                return;
+            }
+            String[] playlistNames = new String[size];
+            final boolean[] checkedItems = new boolean[size];
+            for (int i = 0; i < size; i++) {
+                playlistNames[i] = list.get(i).getPlaylistName();
+                checkedItems[i] = false;
+            }
+            new AlertDialog.Builder(getContext())
+            .setTitle(R.string.restore_playlist)
+            .setCancelable(true)
+            // Items
+            .setMultiChoiceItems(playlistNames, checkedItems,
+                    new DialogInterface.OnMultiChoiceClickListener() {
+                
+                @Override
+                public void onClick(DialogInterface dialog, int which,
+                        boolean isChecked) {
+                    checkedItems[which] = isChecked;
+                }
+            })
+            // Restore
+            .setPositiveButton(android.R.string.ok,
+                    new DialogInterface.OnClickListener() {
+                
+                @Override
+                public void onClick(DialogInterface dialog, int which) {
+                	boolean isRestored = false;
+                    for (int i = 0; i < size; i++) {
+                        try {
+                        	if (checkedItems[i]) {
+                        		backup.restore(list.get(i));
+                        		isRestored = true;
+                        	}
+                        } catch (IOException ex) {
+                            ExceptionHandler.alert(getContext(), 
+                                    getString(R.string.error_while_restore_backup)
+                                    + list.get(i).getPlaylistName());
+                        }
+                    }
+                    if (isRestored) {
+                    	Toast.makeText(getContext(), getString(R.string.done),
+                    			Toast.LENGTH_LONG).show();
+                    }
+                    // Update list of playlists.
+                    getPlaylists();
+                }
+            })
+            // Delete backups
+            .setNegativeButton(R.string.delete,
+                    new DialogInterface.OnClickListener() {
+                
+                @Override
+                public void onClick(DialogInterface dialog, int which) {
+                    for (int i = 0; i < size; i++) {
+                    	if (checkedItems[i]) {
+                    		backup.delete(list.get(i).getFilename());
+                    	}
+                    }
+                }
+            })
+            // Cancel
+            .setNeutralButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
+                
+                @Override
+                public void onClick(DialogInterface dialog, int which) {
+                    dialog.cancel();
+                }
+            })
+            .show();
+        } catch (IOException ex) {
+            ExceptionHandler.alert(getContext(), ex);
+        }
+    }
+    
+    /** Show editor window by select item. */
+    private OnItemClickListener itemClickListener = new OnItemClickListener() {
+
+        @Override
+        public void onItemClick(AdapterView<?> p, View v, int pos, long id) {
+            int playlistId = adapter.getItem(pos).getId();
+            String playlistName = adapter.getItem(pos).getName();
+            editPlaylist(playlistId, playlistName);
+        }
+    };
+    
+    /*** API SPECIFIC METHODS  ***/
+    private boolean isNewApi() {
+        return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB);
+    }
+    
+    @Override
+    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
+        super.onCreateContextMenu(menu, v, menuInfo);
+        getMenuInflater().inflate(R.menu.main_context, menu);
+    }
+    
+    @Override
+    public boolean onContextItemSelected(MenuItem item) {
+        AdapterView.AdapterContextMenuInfo info =
+                (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
+        selectedIndex = info.position;
+        
+        actionOrContextMenuItemClicked(item);
+        return true;
+    }
+    
+    private boolean actionOrContextMenuItemClicked(MenuItem item) {
+        if ( !(0 <= selectedIndex) && (selectedIndex < adapter.getCount()) ) {
+            return false;
+        }
+        
+        int playlistId = adapter.getItem(selectedIndex).getId();
+        switch (item.getItemId()) {
+            case R.id.menu_delete_playlist:
+                deletePlaylist(playlistId);
+                return true;
+            case R.id.menu_rename_playlist:
+                renamePlaylist(playlistId);
+                return true;
+            case R.id.menu_backup_playlist:
+                backupPlaylist(adapter.getItem(selectedIndex));
+                return true;
+        }
+        return false;
+    }
+    
+    /** Implements only in SDK >= 11 */
+    private OnItemLongClickListener itemLongClickListener = new OnItemLongClickListener() {
+
+        @SuppressLint("NewApi")
+        @Override
+        public boolean onItemLongClick(AdapterView<?> p, View v, int pos, long id) {
+            if (actionMode != null) return false;
+
+            selectedIndex = pos;
+            if (isNewApi()) {
+                actionMode = startActionMode(new ActionMode.Callback() {
+
+                    @Override
+                    public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+                        MenuInflater inflater = mode.getMenuInflater();
+                        inflater.inflate(R.menu.main_context, menu);
+                        return true;
+                    }
+
+                    @Override
+                    public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
+                        return false;
+                    }
+
+                    @Override
+                    public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+                        if (actionOrContextMenuItemClicked(item)) {
+                            mode.finish();
+                            return true;
+                        }
+                        
+                        return false;
+                    }
+
+                    @Override
+                    public void onDestroyActionMode(ActionMode mode) {
+                        actionMode = null;
+                    }
+                });
+            }
+            v.setSelected(true);
+            return true;
+        }
+    };
+}
diff --git a/src/com/annimon/playlisteditor/TracksAdapter.java b/src/com/annimon/playlisteditor/TracksAdapter.java
new file mode 100644
index 0000000..0d4ec84
--- /dev/null
+++ b/src/com/annimon/playlisteditor/TracksAdapter.java
@@ -0,0 +1,85 @@
+package com.annimon.playlisteditor;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.TextView;
+import com.annimon.playlisteditor.data.Track;
+
+/**
+ * Adapter for track info.
+ * @author aNNiMON
+ */
+public class TracksAdapter extends ArrayAdapter<Track> {
+
+    private int resource;
+    private LayoutInflater inflater;
+    private List<Track> objects;
+    
+    public TracksAdapter(Context context, int resource, Track[] tracksArray) {
+        super(context, resource, tracksArray);
+        
+        this.resource = resource;
+        objects = new ArrayList<Track>();
+        objects.addAll(Arrays.asList(tracksArray));
+        
+        inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+    }
+    
+    public void addTrack(int position, Track track) {
+        if (position > objects.size()) {
+            objects.add(track);
+        } else {
+            objects.add(position, track);
+        }
+        notifyDataSetChanged();
+    }
+    
+    public void removeTrack(int position) {
+        objects.remove(position);
+        notifyDataSetChanged();
+    }
+    
+    @Override
+    public int getCount() {
+        return objects.size();
+    }
+
+    @Override
+    public Track getItem(int position) {
+        return objects.get(position);
+    }
+
+    @Override
+    public long getItemId(int position) {
+        return position;
+    }
+    
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent) {
+        View v = convertView;
+        ViewHolder holder;
+        
+        if (convertView == null) {
+            holder = new ViewHolder();
+            v = inflater.inflate(resource, null);
+            holder.text = (TextView) v.findViewById(android.R.id.text1);
+            v.setTag(holder);
+        } else {
+            holder = (ViewHolder) v.getTag();
+        }
+        
+        holder.text.setText(objects.get(position).toString());
+
+        return v;
+    }
+
+    private static class ViewHolder {
+        TextView text;
+    }
+}
diff --git a/src/com/annimon/playlisteditor/data/BackupFile.java b/src/com/annimon/playlisteditor/data/BackupFile.java
new file mode 100644
index 0000000..8ffb8a4
--- /dev/null
+++ b/src/com/annimon/playlisteditor/data/BackupFile.java
@@ -0,0 +1,21 @@
+package com.annimon.playlisteditor.data;
+
+public class BackupFile {
+
+    private String filename;
+    private String playlistName;
+    
+    public BackupFile(String filename, String playlistName) {
+        this.filename = filename;
+        this.playlistName = playlistName;
+    }
+
+    public String getFilename() {
+        return filename;
+    }
+
+    public String getPlaylistName() {
+        return playlistName;
+    }
+
+}
diff --git a/src/com/annimon/playlisteditor/data/Playlist.java b/src/com/annimon/playlisteditor/data/Playlist.java
new file mode 100644
index 0000000..988768e
--- /dev/null
+++ b/src/com/annimon/playlisteditor/data/Playlist.java
@@ -0,0 +1,36 @@
+package com.annimon.playlisteditor.data;
+
+public class Playlist {
+
+    private int id;
+    private String name;
+    
+    
+    public Playlist(int id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+    
+    public int getId() {
+        return id;
+    }
+    
+    public void setId(int id) {
+        this.id = id;
+    }
+    
+    public String getName() {
+        return name;
+    }
+    
+    public void setName(String name) {
+        this.name = name;
+    }
+    
+    @Override
+    public String toString() {
+        return name;
+    }
+
+    
+}
diff --git a/src/com/annimon/playlisteditor/data/Track.java b/src/com/annimon/playlisteditor/data/Track.java
new file mode 100644
index 0000000..40525e8
--- /dev/null
+++ b/src/com/annimon/playlisteditor/data/Track.java
@@ -0,0 +1,23 @@
+package com.annimon.playlisteditor.data;
+
+
+public class Track {
+
+    private int audioId;
+    private String artist, title;
+    
+    public Track(int audioId, String artist, String title) {
+        this.audioId = audioId;
+        this.artist = artist;
+        this.title = title;
+    }
+    
+    public int getAudioId() {
+        return audioId;
+    }
+
+    @Override
+    public String toString() {
+        return artist + " - " + title;
+    }
+}