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Add horizontal progress bar

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This commit is contained in:
Victor 2014-06-15 18:46:20 +03:00
parent 3c70ea270f
commit 3d37dd899f
1 changed files with 69 additions and 26 deletions
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89
src/com/blundell/tut/LoaderImageView.java
View File

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