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/*
This file is part of Subsonic.
Subsonic is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Subsonic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Subsonic. If not, see <http://www.gnu.org/licenses/>.
Copyright 2009 (C) Sindre Mehus
*/
package github.daneren2005.dsub.util;
import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.Shader;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.TransitionDrawable;
import android.media.RemoteControlClient;
import android.os.Build;
import android.os.Handler;
import android.os.Looper;
import android.util.DisplayMetrics;
import android.util.Log;
import android.support.v4.util.LruCache;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import github.daneren2005.dsub.R;
import github.daneren2005.dsub.domain.MusicDirectory;
import github.daneren2005.dsub.service.MusicService;
import github.daneren2005.dsub.service.MusicServiceFactory;
/**
* Asynchronous loading of images, with caching.
* <p/>
* There should normally be only one instance of this class.
*
* @author Sindre Mehus
*/
public class ImageLoader {
private static final String TAG = ImageLoader.class.getSimpleName();
private Context context;
private LruCache<String, Bitmap> cache;
private Handler handler;
private Bitmap nowPlaying;
private final int imageSizeDefault;
private final int imageSizeLarge;
private final int avatarSizeDefault;
private final static int[] COLORS = {0xFF33B5E5, 0xFFAA66CC, 0xFF99CC00, 0xFFFFBB33, 0xFFFF4444};
public ImageLoader(Context context) {
this.context = context;
handler = new Handler(Looper.getMainLooper());
final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
final int cacheSize = maxMemory / 4;
cache = new LruCache<String, Bitmap>(cacheSize) {
@Override
protected int sizeOf(String key, Bitmap bitmap) {
return bitmap.getRowBytes() * bitmap.getHeight() / 1024;
}
@Override
protected void entryRemoved(boolean evicted, String key, Bitmap oldBitmap, Bitmap newBitmap) {
if(evicted) {
if(oldBitmap != nowPlaying) {
if(sizeOf("", oldBitmap) > 500) {
oldBitmap.recycle();
}
} else {
cache.put(key, oldBitmap);
}
}
}
};
// Determine the density-dependent image sizes.
imageSizeDefault = context.getResources().getDrawable(R.drawable.unknown_album).getIntrinsicHeight();
DisplayMetrics metrics = context.getResources().getDisplayMetrics();
imageSizeLarge = Math.round(Math.min(metrics.widthPixels, metrics.heightPixels));
avatarSizeDefault = context.getResources().getDrawable(R.drawable.ic_social_person).getIntrinsicHeight();
}
public void clearCache() {
nowPlaying = null;
cache.evictAll();
}
private Bitmap getUnknownImage(MusicDirectory.Entry entry, int size) {
String key;
int color;
if(entry == null) {
key = getKey("unknown", size);
color = COLORS[0];
} else {
key = getKey(entry.getId() + "unknown", size);
String hash;
if(entry.getAlbum() != null) {
hash = entry.getAlbum();
} else if(entry.getArtist() != null) {
hash = entry.getArtist();
} else {
hash = entry.getId();
}
color = COLORS[Math.abs(hash.hashCode()) % COLORS.length];
}
Bitmap bitmap = cache.get(key);
if(bitmap == null) {
bitmap = createUnknownImage(entry, size, color);
cache.put(key, bitmap);
}
return bitmap;
}
private Bitmap createUnknownImage(MusicDirectory.Entry entry, int size, int primaryColor) {
Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
Paint color = new Paint();
color.setColor(primaryColor);
canvas.drawRect(0, 0, size, size * 2.0f / 3.0f, color);
color.setShader(new LinearGradient(0, 0, 0, size / 3.0f, Color.rgb(82, 82, 82), Color.BLACK, Shader.TileMode.MIRROR));
canvas.drawRect(0, size * 2.0f / 3.0f, size, size, color);
if(entry != null) {
Paint font = new Paint();
font.setFlags(Paint.ANTI_ALIAS_FLAG);
font.setColor(Color.WHITE);
font.setTextSize(3.0f + size * 0.07f);
if(entry.getAlbum() != null) {
canvas.drawText(entry.getAlbum(), size * 0.05f, size * 0.6f, font);
}
if(entry.getArtist() != null) {
canvas.drawText(entry.getArtist(), size * 0.05f, size * 0.8f, font);
}
}
return bitmap;
}
public Bitmap getCachedImage(Context context, MusicDirectory.Entry entry, boolean large) {
int size = large ? imageSizeLarge : imageSizeDefault;
if(entry == null || entry.getCoverArt() == null) {
return getUnknownImage(entry, size);
}
Bitmap bitmap = cache.get(getKey(entry.getCoverArt(), size));
if(bitmap == null || bitmap.isRecycled()) {
bitmap = FileUtil.getAlbumArtBitmap(context, entry, size);
String key = getKey(entry.getCoverArt(), size);
cache.put(key, bitmap);
cache.get(key);
}
return bitmap;
}
public ImageTask loadImage(View view, MusicDirectory.Entry entry, boolean large, boolean crossfade) {
if(entry != null && entry.getCoverArt() == null && entry.isDirectory() && !Util.isOffline(context)) {
// Try to lookup child cover art
MusicDirectory.Entry firstChild = FileUtil.lookupChild(context, entry, true);
if(firstChild != null) {
entry.setCoverArt(firstChild.getCoverArt());
}
}
Bitmap bitmap;
int size = large ? imageSizeLarge : imageSizeDefault;
if (entry == null || entry.getCoverArt() == null) {
bitmap = getUnknownImage(entry, size);
setImage(view, Util.createDrawableFromBitmap(context, bitmap), crossfade);
return null;
}
bitmap = cache.get(getKey(entry.getCoverArt(), size));
if (bitmap != null && !bitmap.isRecycled()) {
final Drawable drawable = Util.createDrawableFromBitmap(this.context, bitmap);
setImage(view, drawable, crossfade);
if(large) {
nowPlaying = bitmap;
}
return null;
}
if (!large) {
setImage(view, Util.createDrawableFromBitmap(context, null), false);
}
ImageTask task = new ViewImageTask(view.getContext(), entry, size, imageSizeLarge, large, view, crossfade);
task.execute();
return task;
}
public SilentBackgroundTask<Void> loadImage(Context context, RemoteControlClient remoteControl, MusicDirectory.Entry entry) {
Bitmap bitmap;
if (entry == null || entry.getCoverArt() == null) {
bitmap = getUnknownImage(entry, imageSizeLarge);
setImage(remoteControl, Util.createDrawableFromBitmap(context, bitmap));
return null;
}
bitmap = cache.get(getKey(entry.getCoverArt(), imageSizeLarge));
if (bitmap != null && !bitmap.isRecycled()) {
Drawable drawable = Util.createDrawableFromBitmap(this.context, bitmap);
setImage(remoteControl, drawable);
return null;
}
setImage(remoteControl, Util.createDrawableFromBitmap(context, null));
ImageTask task = new RemoteControlClientImageTask(context, entry, imageSizeLarge, imageSizeLarge, false, remoteControl);
task.execute();
return task;
}
public SilentBackgroundTask<Void> loadAvatar(Context context, ImageView view, String username) {
Bitmap bitmap = cache.get(username);
if (bitmap != null && !bitmap.isRecycled()) {
Drawable drawable = Util.createDrawableFromBitmap(this.context, bitmap);
view.setImageDrawable(drawable);
return null;
}
SilentBackgroundTask<Void> task = new AvatarTask(context, view, username);
task.execute();
return task;
}
private String getKey(String coverArtId, int size) {
return coverArtId + size;
}
private void setImage(View view, final Drawable drawable, boolean crossfade) {
if (view instanceof TextView) {
// Cross-fading is not implemented for TextView since it's not in use. It would be easy to add it, though.
TextView textView = (TextView) view;
textView.setCompoundDrawablesWithIntrinsicBounds(drawable, null, null, null);
} else if (view instanceof ImageView) {
final ImageView imageView = (ImageView) view;
if (crossfade) {
Drawable existingDrawable = imageView.getDrawable();
if (existingDrawable == null) {
Bitmap emptyImage;
if(drawable.getIntrinsicWidth() > 0 && drawable.getIntrinsicHeight() > 0) {
emptyImage = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
} else {
emptyImage = Bitmap.createBitmap(imageSizeDefault, imageSizeDefault, Bitmap.Config.ARGB_8888);
}
existingDrawable = new BitmapDrawable(context.getResources(), emptyImage);
} else if(existingDrawable instanceof TransitionDrawable) {
// This should only ever be used if user is skipping through many songs quickly
TransitionDrawable tmp = (TransitionDrawable) existingDrawable;
existingDrawable = tmp.getDrawable(tmp.getNumberOfLayers() - 1);
}
Drawable[] layers = new Drawable[] {existingDrawable, drawable};
final TransitionDrawable transitionDrawable = new TransitionDrawable(layers);
imageView.setImageDrawable(transitionDrawable);
transitionDrawable.startTransition(250);
// Get rid of transition drawable after transition occurs
handler.postDelayed(new Runnable() {
@Override
public void run() {
// Only execute if still on same transition drawable
if(imageView.getDrawable() == transitionDrawable) {
imageView.setImageDrawable(drawable);
}
}
}, 500L);
} else {
imageView.setImageDrawable(drawable);
}
}
}
@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
private void setImage(RemoteControlClient remoteControl, Drawable drawable) {
if(remoteControl != null && drawable != null) {
Bitmap origBitmap = ((BitmapDrawable)drawable).getBitmap();
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2 && origBitmap != null) {
origBitmap = origBitmap.copy(origBitmap.getConfig(), false);
}
if ( origBitmap != null && !origBitmap.isRecycled()) {
remoteControl.editMetadata(false).putBitmap(RemoteControlClient.MetadataEditor.BITMAP_KEY_ARTWORK, origBitmap).apply();
} else {
Log.e(TAG, "Tried to load a recycled bitmap.");
remoteControl.editMetadata(false)
.putBitmap(RemoteControlClient.MetadataEditor.BITMAP_KEY_ARTWORK, null)
.apply();
}
}
}
public abstract class ImageTask extends SilentBackgroundTask<Void> {
private final Context mContext;
private final MusicDirectory.Entry mEntry;
private final int mSize;
private final int mSaveSize;
private final boolean mIsNowPlaying;
protected Drawable mDrawable;
public ImageTask(Context context, MusicDirectory.Entry entry, int size, int saveSize, boolean isNowPlaying) {
super(context);
mContext = context;
mEntry = entry;
mSize = size;
mSaveSize = saveSize;
mIsNowPlaying = isNowPlaying;
}
@Override
protected Void doInBackground() throws Throwable {
try {
MusicService musicService = MusicServiceFactory.getMusicService(mContext);
Bitmap bitmap = musicService.getCoverArt(mContext, mEntry, mSize, null, this);
String key = getKey(mEntry.getCoverArt(), mSize);
cache.put(key, bitmap);
// Make sure key is the most recently "used"
cache.get(key);
if(mIsNowPlaying) {
nowPlaying = bitmap;
}
mDrawable = Util.createDrawableFromBitmap(mContext, bitmap);
} catch (Throwable x) {
Log.e(TAG, "Failed to download album art.", x);
cancelled.set(true);
}
return null;
}
}
private class ViewImageTask extends ImageTask {
protected boolean mCrossfade;
private View mView;
public ViewImageTask(Context context, MusicDirectory.Entry entry, int size, int saveSize, boolean isNowPlaying, View view, boolean crossfade) {
super(context, entry, size, saveSize, isNowPlaying);
mView = view;
mCrossfade = crossfade;
}
@Override
protected void done(Void result) {
setImage(mView, mDrawable, mCrossfade);
}
}
private class RemoteControlClientImageTask extends ImageTask {
private RemoteControlClient mRemoteControl;
public RemoteControlClientImageTask(Context context, MusicDirectory.Entry entry, int size, int saveSize, boolean isNowPlaying, RemoteControlClient remoteControl) {
super(context, entry, size, saveSize, isNowPlaying);
mRemoteControl = remoteControl;
}
@Override
protected void done(Void result) {
setImage(mRemoteControl, mDrawable);
}
}
private class AvatarTask extends SilentBackgroundTask<Void> {
private final Context mContext;
private final String mUsername;
private final ImageView mView;
private Drawable mDrawable;
public AvatarTask(Context context, ImageView view, String username) {
super(context);
mContext = context;
mView = view;
mUsername = username;
}
@Override
protected Void doInBackground() throws Throwable {
try {
MusicService musicService = MusicServiceFactory.getMusicService(mContext);
Bitmap bitmap = musicService.getAvatar(mUsername, avatarSizeDefault, mContext, null, this);
if(bitmap != null) {
cache.put(mUsername, bitmap);
// Make sure key is the most recently "used"
cache.get(mUsername);
mDrawable = Util.createDrawableFromBitmap(mContext, bitmap);
}
} catch (Throwable x) {
Log.e(TAG, "Failed to download album art.", x);
cancelled.set(true);
}
return null;
}
@Override
protected void done(Void result) {
if(mDrawable != null) {
mView.setImageDrawable(mDrawable);
}
}
}
}
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