Add horizontal progress bar
This commit is contained in:
parent
3c70ea270f
commit
3d37dd899f
@ -1,33 +1,39 @@
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package com.blundell.tut;
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import java.io.BufferedInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.net.URLConnection;
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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import android.os.Handler;
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import android.os.Message;
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import android.os.Handler.Callback;
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import android.os.Message;
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import android.util.AttributeSet;
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import android.view.View;
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import android.widget.FrameLayout;
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import android.widget.ImageView;
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import android.widget.LinearLayout;
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import android.widget.ProgressBar;
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/**
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* Free for anyone to use, just say thanks and share :-)
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* @author Blundell
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*/
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public class LoaderImageView extends LinearLayout {
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public final class LoaderImageView extends FrameLayout {
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private static final int COMPLETE = 0;
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private static final int FAILED = 1;
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private static final int PROGRESS = 2;
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private Context mContext;
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private Drawable mDrawable;
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private ProgressBar mSpinner;
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private ProgressBar mProgressBar;
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private ImageView mImage;
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/**
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@ -42,15 +48,11 @@ public class LoaderImageView extends LinearLayout {
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public LoaderImageView(final Context context, final AttributeSet attrSet) {
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super(context, attrSet);
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final String url = attrSet.getAttributeValue(null, "image");
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if (url != null) {
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instantiate(context, url);
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} else {
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instantiate(context, null);
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}
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}
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/**
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* This is used when creating the view programatically
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* This is used when creating the view programmatically
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* Once you have instantiated the view you can call
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* setImageDrawable(url) to change the image
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* @param context the Activity context
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@ -62,7 +64,7 @@ public class LoaderImageView extends LinearLayout {
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}
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/**
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* This is used when creating the view programatically
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* This is used when creating the view programmatically
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* Once you have instantiated the view you can call
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* setImageDrawable(url) to change the image
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* @param context the Activity context
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@ -82,15 +84,15 @@ public class LoaderImageView extends LinearLayout {
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mContext = context;
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mImage = new ImageView(mContext);
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mImage.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
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mImage.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
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mSpinner = new ProgressBar(mContext);
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mSpinner.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
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mProgressBar = new ProgressBar(mContext, null, android.R.attr.progressBarStyleHorizontal);
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mProgressBar.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
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mProgressBar.setProgress(0);
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mProgressBar.setMax(100);
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mSpinner.setIndeterminate(true);
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addView(mSpinner);
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addView(mImage);
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addView(mProgressBar);
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if (imageUrl != null) {
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setImageDrawable(imageUrl);
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@ -104,8 +106,9 @@ public class LoaderImageView extends LinearLayout {
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*/
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public void setImageDrawable(final String imageUrl) {
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mDrawable = null;
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mSpinner.setVisibility(View.VISIBLE);
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mImage.setVisibility(View.GONE);
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mProgressBar.setVisibility(View.VISIBLE);
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mProgressBar.setProgress(0);
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mProgressBar.setMax(100);
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new Thread() {
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@Override
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public void run() {
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@ -121,6 +124,10 @@ public class LoaderImageView extends LinearLayout {
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}.start();
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}
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public Drawable getDrawable() {
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return mImage.getDrawable();
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}
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/**
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* Callback that is received once the image has been downloaded
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*/
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@ -130,8 +137,10 @@ public class LoaderImageView extends LinearLayout {
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switch (msg.what) {
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case COMPLETE:
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mImage.setImageDrawable(mDrawable);
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mImage.setVisibility(View.VISIBLE);
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mSpinner.setVisibility(View.GONE);
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mProgressBar.setVisibility(View.GONE);
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break;
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case PROGRESS:
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mProgressBar.setProgress(msg.arg1);
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break;
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case FAILED:
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default:
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@ -149,8 +158,42 @@ public class LoaderImageView extends LinearLayout {
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* @throws IOException
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* @throws MalformedURLException
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*/
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private static Drawable getDrawableFromUrl(final String url) throws IOException, MalformedURLException {
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return Drawable.createFromStream(((InputStream) new URL(url).getContent()), "name");
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private Drawable getDrawableFromUrl(final String imageUrl) throws IOException, MalformedURLException {
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final URL url = new URL(imageUrl);
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final URLConnection conection = url.openConnection();
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conection.connect();
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// this will be useful so that you can show a typical 0-100% progress bar
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int lenghtOfFile = conection.getContentLength();
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if (lenghtOfFile <= 0) {
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// try to load by system call
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return Drawable.createFromStream((InputStream) url.getContent(), "name");
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}
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// download the file
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final InputStream input = new BufferedInputStream(url.openStream(), 8192);
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ByteArrayOutputStream output = new ByteArrayOutputStream(lenghtOfFile);
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final byte[] buffer = new byte[4096];
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long total = 0;
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int count;
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while ((count = input.read(buffer)) != -1) {
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total += count;
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// publishing the progress....
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imageLoadedHandler.obtainMessage(PROGRESS, (int) ((total * 100) / lenghtOfFile), 0)
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.sendToTarget();
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// writing data
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output.write(buffer, 0, count);
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}
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// flushing output
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output.flush();
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// closing streams
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output.close();
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input.close();
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byte[] data = output.toByteArray();
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output = null;
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Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
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data = null;
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return new BitmapDrawable(mContext.getResources(), bitmap);
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}
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}
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