private Bitmap generateShortcutPreview(
ResolveInfo info, int maxWidth, int maxHeight, Bitmap preview) {
Bitmap tempBitmap = mCachedShortcutPreviewBitmap.get();
final Canvas c = mCachedShortcutPreviewCanvas.get();
if (tempBitmap == null
|| tempBitmap.getWidth() != maxWidth
|| tempBitmap.getHeight() != maxHeight) {
tempBitmap = Bitmap.createBitmap(maxWidth, maxHeight, Config.ARGB_8888);
mCachedShortcutPreviewBitmap.set(tempBitmap);
} else {
c.setBitmap(tempBitmap);
c.drawColor(0, PorterDuff.Mode.CLEAR);
c.setBitmap(null);
}
// Render the icon
Drawable icon = mIconCache.getFullResIcon(info);
int paddingTop =
mContext.getResources().getDimensionPixelOffset(R.dimen.shortcut_preview_padding_top);
int paddingLeft =
mContext.getResources().getDimensionPixelOffset(R.dimen.shortcut_preview_padding_left);
int paddingRight =
mContext.getResources().getDimensionPixelOffset(R.dimen.shortcut_preview_padding_right);
int scaledIconWidth = (maxWidth - paddingLeft - paddingRight);
renderDrawableToBitmap(
icon, tempBitmap, paddingLeft, paddingTop, scaledIconWidth, scaledIconWidth);
if (preview != null && (preview.getWidth() != maxWidth || preview.getHeight() != maxHeight)) {
throw new RuntimeException("Improperly sized bitmap passed as argument");
} else if (preview == null) {
preview = Bitmap.createBitmap(maxWidth, maxHeight, Config.ARGB_8888);
}
c.setBitmap(preview);
// Draw a desaturated/scaled version of the icon in the background as a watermark
Paint p = mCachedShortcutPreviewPaint.get();
if (p == null) {
p = new Paint();
ColorMatrix colorMatrix = new ColorMatrix();
colorMatrix.setSaturation(0);
p.setColorFilter(new ColorMatrixColorFilter(colorMatrix));
p.setAlpha((int) (255 * 0.06f));
mCachedShortcutPreviewPaint.set(p);
}
c.drawBitmap(tempBitmap, 0, 0, p);
c.setBitmap(null);
renderDrawableToBitmap(icon, preview, 0, 0, mAppIconSize, mAppIconSize);
return preview;
}
public Bitmap generateWidgetPreview(
ComponentName provider,
int previewImage,
int iconId,
int cellHSpan,
int cellVSpan,
int maxPreviewWidth,
int maxPreviewHeight,
Bitmap preview,
int[] preScaledWidthOut) {
// Load the preview image if possible
String packageName = provider.getPackageName();
if (maxPreviewWidth < 0) maxPreviewWidth = Integer.MAX_VALUE;
if (maxPreviewHeight < 0) maxPreviewHeight = Integer.MAX_VALUE;
Drawable drawable = null;
if (previewImage != 0) {
drawable = mPackageManager.getDrawable(packageName, previewImage, null);
if (drawable == null) {
Log.w(
TAG,
"Can't load widget preview drawable 0x"
+ Integer.toHexString(previewImage)
+ " for provider: "
+ provider);
}
}
int previewWidth;
int previewHeight;
Bitmap defaultPreview = null;
boolean widgetPreviewExists = (drawable != null);
if (widgetPreviewExists) {
previewWidth = drawable.getIntrinsicWidth();
previewHeight = drawable.getIntrinsicHeight();
} else {
// Generate a preview image if we couldn't load one
if (cellHSpan < 1) cellHSpan = 1;
if (cellVSpan < 1) cellVSpan = 1;
BitmapDrawable previewDrawable =
(BitmapDrawable) mContext.getResources().getDrawable(R.drawable.widget_tile);
final int previewDrawableWidth = previewDrawable.getIntrinsicWidth();
final int previewDrawableHeight = previewDrawable.getIntrinsicHeight();
previewWidth = previewDrawableWidth * cellHSpan;
previewHeight = previewDrawableHeight * cellVSpan;
defaultPreview = Bitmap.createBitmap(previewWidth, previewHeight, Config.ARGB_8888);
final Canvas c = mCachedAppWidgetPreviewCanvas.get();
c.setBitmap(defaultPreview);
previewDrawable.setBounds(0, 0, previewWidth, previewHeight);
previewDrawable.setTileModeXY(Shader.TileMode.REPEAT, Shader.TileMode.REPEAT);
previewDrawable.draw(c);
c.setBitmap(null);
// Draw the icon in the top left corner
int minOffset = (int) (mAppIconSize * sWidgetPreviewIconPaddingPercentage);
int smallestSide = Math.min(previewWidth, previewHeight);
float iconScale = Math.min((float) smallestSide / (mAppIconSize + 2 * minOffset), 1f);
try {
Drawable icon = null;
int hoffset = (int) ((previewDrawableWidth - mAppIconSize * iconScale) / 2);
int yoffset = (int) ((previewDrawableHeight - mAppIconSize * iconScale) / 2);
if (iconId > 0) icon = mIconCache.getFullResIcon(packageName, iconId);
if (icon != null) {
renderDrawableToBitmap(
icon,
defaultPreview,
hoffset,
yoffset,
(int) (mAppIconSize * iconScale),
(int) (mAppIconSize * iconScale));
}
} catch (Resources.NotFoundException e) {
}
}
// Scale to fit width only - let the widget preview be clipped in the
// vertical dimension
float scale = 1f;
if (preScaledWidthOut != null) {
preScaledWidthOut[0] = previewWidth;
}
if (previewWidth > maxPreviewWidth) {
scale = maxPreviewWidth / (float) previewWidth;
}
if (scale != 1f) {
previewWidth = (int) (scale * previewWidth);
previewHeight = (int) (scale * previewHeight);
}
// If a bitmap is passed in, we use it; otherwise, we create a bitmap of the right size
if (preview == null) {
preview = Bitmap.createBitmap(previewWidth, previewHeight, Config.ARGB_8888);
}
// Draw the scaled preview into the final bitmap
int x = (preview.getWidth() - previewWidth) / 2;
if (widgetPreviewExists) {
renderDrawableToBitmap(drawable, preview, x, 0, previewWidth, previewHeight);
} else {
final Canvas c = mCachedAppWidgetPreviewCanvas.get();
final Rect src = mCachedAppWidgetPreviewSrcRect.get();
final Rect dest = mCachedAppWidgetPreviewDestRect.get();
c.setBitmap(preview);
src.set(0, 0, defaultPreview.getWidth(), defaultPreview.getHeight());
dest.set(x, 0, x + previewWidth, previewHeight);
Paint p = mCachedAppWidgetPreviewPaint.get();
if (p == null) {
p = new Paint();
p.setFilterBitmap(true);
mCachedAppWidgetPreviewPaint.set(p);
}
c.drawBitmap(defaultPreview, src, dest, p);
c.setBitmap(null);
}
return preview;
}
public Bitmap getPreview(final Object o) {
final String name = getObjectName(o);
final String packageName = getObjectPackage(o);
// check if the package is valid
boolean packageValid = true;
synchronized (sInvalidPackages) {
packageValid = !sInvalidPackages.contains(packageName);
}
if (!packageValid) {
return null;
}
if (packageValid) {
synchronized (mLoadedPreviews) {
// check if it exists in our existing cache
if (mLoadedPreviews.containsKey(name) && mLoadedPreviews.get(name).get() != null) {
return mLoadedPreviews.get(name).get();
}
}
}
Bitmap unusedBitmap = null;
synchronized (mUnusedBitmaps) {
// not in cache; we need to load it from the db
while ((unusedBitmap == null
|| !unusedBitmap.isMutable()
|| unusedBitmap.getWidth() != mPreviewBitmapWidth
|| unusedBitmap.getHeight() != mPreviewBitmapHeight)
&& mUnusedBitmaps.size() > 0) {
unusedBitmap = mUnusedBitmaps.remove(0).get();
}
if (unusedBitmap != null) {
final Canvas c = mCachedAppWidgetPreviewCanvas.get();
c.setBitmap(unusedBitmap);
c.drawColor(0, PorterDuff.Mode.CLEAR);
c.setBitmap(null);
}
}
if (unusedBitmap == null) {
unusedBitmap =
Bitmap.createBitmap(mPreviewBitmapWidth, mPreviewBitmapHeight, Bitmap.Config.ARGB_8888);
}
Bitmap preview = null;
if (packageValid) {
preview = readFromDb(name, unusedBitmap);
}
if (preview != null) {
synchronized (mLoadedPreviews) {
mLoadedPreviews.put(name, new WeakReference<Bitmap>(preview));
}
return preview;
} else {
// it's not in the db... we need to generate it
final Bitmap generatedPreview = generatePreview(o, unusedBitmap);
preview = generatedPreview;
if (preview != unusedBitmap) {
throw new RuntimeException("generatePreview is not recycling the bitmap " + o);
}
synchronized (mLoadedPreviews) {
mLoadedPreviews.put(name, new WeakReference<Bitmap>(preview));
}
// write to db on a thread pool... this can be done lazily and improves the performance
// of the first time widget previews are loaded
new AsyncTask<Void, Void, Void>() {
public Void doInBackground(Void... args) {
writeToDb(o, generatedPreview);
return null;
}
}.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void) null);
return preview;
}
}