Cache widget previews in a DB
- Smoother All Apps scroll performance
Change-Id: Id2d31a45e71c63d05a46f580667ad94403730616
diff --git a/src/com/android/launcher2/AppsCustomizePagedView.java b/src/com/android/launcher2/AppsCustomizePagedView.java
index 1817c82..bfc2db0 100644
--- a/src/com/android/launcher2/AppsCustomizePagedView.java
+++ b/src/com/android/launcher2/AppsCustomizePagedView.java
@@ -30,17 +30,9 @@
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
-import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
-import android.graphics.ColorMatrix;
-import android.graphics.ColorMatrixColorFilter;
-import android.graphics.Matrix;
-import android.graphics.Paint;
-import android.graphics.PorterDuff;
+import android.graphics.Point;
import android.graphics.Rect;
-import android.graphics.RectF;
-import android.graphics.Shader;
-import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.os.Build;
@@ -62,7 +54,6 @@
import com.android.launcher.R;
import com.android.launcher2.DropTarget.DragObject;
-import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
@@ -83,16 +74,6 @@
LoadWidgetPreviewData
}
- AsyncTaskPageData(int p, ArrayList<Object> l, ArrayList<Bitmap> si, AsyncTaskCallback bgR,
- AsyncTaskCallback postR) {
- page = p;
- items = l;
- sourceImages = si;
- generatedImages = new ArrayList<Bitmap>();
- maxImageWidth = maxImageHeight = -1;
- doInBackgroundCallback = bgR;
- postExecuteCallback = postR;
- }
AsyncTaskPageData(int p, ArrayList<Object> l, int cw, int ch, AsyncTaskCallback bgR,
AsyncTaskCallback postR) {
page = p;
@@ -105,18 +86,10 @@
}
void cleanup(boolean cancelled) {
// Clean up any references to source/generated bitmaps
- if (sourceImages != null) {
- if (cancelled) {
- for (Bitmap b : sourceImages) {
- b.recycle();
- }
- }
- sourceImages.clear();
- }
if (generatedImages != null) {
if (cancelled) {
- for (Bitmap b : generatedImages) {
- b.recycle();
+ for (int i = 0; i < generatedImages.size(); i++) {
+ WidgetPreviewLoader.releaseBitmap(items.get(i), generatedImages.get(i));
}
}
generatedImages.clear();
@@ -167,64 +140,6 @@
int threadPriority;
}
-abstract class WeakReferenceThreadLocal<T> {
- private ThreadLocal<WeakReference<T>> mThreadLocal;
- public WeakReferenceThreadLocal() {
- mThreadLocal = new ThreadLocal<WeakReference<T>>();
- }
-
- abstract T initialValue();
-
- public void set(T t) {
- mThreadLocal.set(new WeakReference<T>(t));
- }
-
- public T get() {
- WeakReference<T> reference = mThreadLocal.get();
- T obj;
- if (reference == null) {
- obj = initialValue();
- mThreadLocal.set(new WeakReference<T>(obj));
- return obj;
- } else {
- obj = reference.get();
- if (obj == null) {
- obj = initialValue();
- mThreadLocal.set(new WeakReference<T>(obj));
- }
- return obj;
- }
- }
-}
-
-class CanvasCache extends WeakReferenceThreadLocal<Canvas> {
- @Override
- protected Canvas initialValue() {
- return new Canvas();
- }
-}
-
-class PaintCache extends WeakReferenceThreadLocal<Paint> {
- @Override
- protected Paint initialValue() {
- return null;
- }
-}
-
-class BitmapCache extends WeakReferenceThreadLocal<Bitmap> {
- @Override
- protected Bitmap initialValue() {
- return null;
- }
-}
-
-class RectCache extends WeakReferenceThreadLocal<Rect> {
- @Override
- protected Rect initialValue() {
- return new Rect();
- }
-}
-
/**
* The Apps/Customize page that displays all the applications, widgets, and shortcuts.
*/
@@ -267,11 +182,9 @@
// Dimens
private int mContentWidth;
- private int mAppIconSize;
private int mMaxAppCellCountX, mMaxAppCellCountY;
private int mWidgetCountX, mWidgetCountY;
private int mWidgetWidthGap, mWidgetHeightGap;
- private final float sWidgetPreviewIconPaddingPercentage = 0.25f;
private PagedViewCellLayout mWidgetSpacingLayout;
private int mNumAppsPages;
private int mNumWidgetPages;
@@ -323,6 +236,8 @@
RectCache mCachedAppWidgetPreviewDestRect = new RectCache();
PaintCache mCachedAppWidgetPreviewPaint = new PaintCache();
+ WidgetPreviewLoader mWidgetPreviewLoader;
+
public AppsCustomizePagedView(Context context, AttributeSet attrs) {
super(context, attrs);
mLayoutInflater = LayoutInflater.from(context);
@@ -334,9 +249,6 @@
mRunningTasks = new ArrayList<AppsCustomizeAsyncTask>();
// Save the default widget preview background
- Resources resources = context.getResources();
- mAppIconSize = resources.getDimensionPixelSize(R.dimen.app_icon_size);
-
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.AppsCustomizePagedView, 0, 0);
mMaxAppCellCountX = a.getInt(R.styleable.AppsCustomizePagedView_maxAppCellCountX, -1);
mMaxAppCellCountY = a.getInt(R.styleable.AppsCustomizePagedView_maxAppCellCountY, -1);
@@ -769,6 +681,8 @@
Bitmap preview;
Bitmap outline;
float scale = 1f;
+ Point previewPadding = null;
+
if (createItemInfo instanceof PendingAddWidgetInfo) {
// This can happen in some weird cases involving multi-touch. We can't start dragging
// the widget if this is null, so we break out.
@@ -788,19 +702,25 @@
int maxWidth, maxHeight;
maxWidth = Math.min((int) (previewDrawable.getIntrinsicWidth() * minScale), size[0]);
maxHeight = Math.min((int) (previewDrawable.getIntrinsicHeight() * minScale), size[1]);
- preview = getWidgetPreview(createWidgetInfo.componentName, createWidgetInfo.previewImage,
- createWidgetInfo.icon, spanX, spanY, maxWidth, maxHeight);
- // Determine the image view drawable scale relative to the preview
- float[] mv = new float[9];
- Matrix m = new Matrix();
- m.setRectToRect(
- new RectF(0f, 0f, (float) preview.getWidth(), (float) preview.getHeight()),
- new RectF(0f, 0f, (float) previewDrawable.getIntrinsicWidth(),
- (float) previewDrawable.getIntrinsicHeight()),
- Matrix.ScaleToFit.START);
- m.getValues(mv);
- scale = (float) mv[0];
+ int[] previewSizeBeforeScale = new int[1];
+
+ preview = mWidgetPreviewLoader.generateWidgetPreview(createWidgetInfo.componentName,
+ createWidgetInfo.previewImage, createWidgetInfo.icon, spanX, spanY,
+ maxWidth, maxHeight, null, previewSizeBeforeScale);
+
+ // Compare the size of the drag preview to the preview in the AppsCustomize tray
+ int previewWidthInAppsCustomize = Math.min(previewSizeBeforeScale[0],
+ mWidgetPreviewLoader.maxWidthForWidgetPreview(spanX));
+ scale = previewWidthInAppsCustomize / (float) preview.getWidth();
+
+ // The bitmap in the AppsCustomize tray is always the the same size, so there
+ // might be extra pixels around the preview itself - this accounts for that
+ if (previewWidthInAppsCustomize < previewDrawable.getIntrinsicWidth()) {
+ int padding =
+ (previewDrawable.getIntrinsicWidth() - previewWidthInAppsCustomize) / 2;
+ previewPadding = new Point(padding, 0);
+ }
} else {
PendingAddShortcutInfo createShortcutInfo = (PendingAddShortcutInfo) v.getTag();
Drawable icon = mIconCache.getFullResIcon(createShortcutInfo.shortcutActivityInfo);
@@ -809,7 +729,7 @@
mCanvas.setBitmap(preview);
mCanvas.save();
- renderDrawableToBitmap(icon, preview, 0, 0,
+ WidgetPreviewLoader.renderDrawableToBitmap(icon, preview, 0, 0,
icon.getIntrinsicWidth(), icon.getIntrinsicHeight());
mCanvas.restore();
mCanvas.setBitmap(null);
@@ -828,7 +748,7 @@
mLauncher.lockScreenOrientation();
mLauncher.getWorkspace().onDragStartedWithItem(createItemInfo, outline, clipAlpha);
mDragController.startDrag(image, preview, this, createItemInfo,
- DragController.DRAG_ACTION_COPY, null, scale);
+ DragController.DRAG_ACTION_COPY, previewPadding, scale);
outline.recycle();
preview.recycle();
return true;
@@ -1215,181 +1135,6 @@
layout.measure(widthSpec, heightSpec);
}
- private void renderDrawableToBitmap(Drawable d, Bitmap bitmap, int x, int y, int w, int h) {
- renderDrawableToBitmap(d, bitmap, x, y, w, h, 1f);
- }
-
- private void renderDrawableToBitmap(Drawable d, Bitmap bitmap, int x, int y, int w, int h,
- float scale) {
- if (bitmap != null) {
- Canvas c = new Canvas(bitmap);
- c.scale(scale, scale);
- Rect oldBounds = d.copyBounds();
- d.setBounds(x, y, x + w, y + h);
- d.draw(c);
- d.setBounds(oldBounds); // Restore the bounds
- c.setBitmap(null);
- }
- }
-
- private Bitmap getShortcutPreview(ResolveInfo info, int maxWidth, int maxHeight) {
- 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 =
- getResources().getDimensionPixelOffset(R.dimen.shortcut_preview_padding_top);
- int paddingLeft =
- getResources().getDimensionPixelOffset(R.dimen.shortcut_preview_padding_left);
- int paddingRight =
- getResources().getDimensionPixelOffset(R.dimen.shortcut_preview_padding_right);
-
- int scaledIconWidth = (maxWidth - paddingLeft - paddingRight);
-
- renderDrawableToBitmap(
- icon, tempBitmap, paddingLeft, paddingTop, scaledIconWidth, scaledIconWidth);
-
- Bitmap preview = Bitmap.createBitmap(maxWidth, maxHeight, Config.ARGB_8888);
- c.setBitmap(preview);
- 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));
- //float density = 1f;
- //p.setMaskFilter(new BlurMaskFilter(15*density, BlurMaskFilter.Blur.NORMAL));
- mCachedShortcutPreviewPaint.set(p);
- }
- c.drawBitmap(tempBitmap, 0, 0, p);
- c.setBitmap(null);
-
- renderDrawableToBitmap(icon, preview, 0, 0, mAppIconSize, mAppIconSize);
-
- return preview;
- }
-
- private Bitmap getWidgetPreview(ComponentName provider, int previewImage,
- int iconId, int cellHSpan, int cellVSpan, int maxWidth,
- int maxHeight) {
- // Load the preview image if possible
- String packageName = provider.getPackageName();
- if (maxWidth < 0) maxWidth = Integer.MAX_VALUE;
- if (maxHeight < 0) maxHeight = 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 bitmapWidth;
- int bitmapHeight;
- Bitmap defaultPreview = null;
- boolean widgetPreviewExists = (drawable != null);
- if (widgetPreviewExists) {
- bitmapWidth = drawable.getIntrinsicWidth();
- bitmapHeight = 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) getResources()
- .getDrawable(R.drawable.widget_preview_tile);
- final int previewDrawableWidth = previewDrawable
- .getIntrinsicWidth();
- final int previewDrawableHeight = previewDrawable
- .getIntrinsicHeight();
- bitmapWidth = previewDrawableWidth * cellHSpan; // subtract 2 dips
- bitmapHeight = previewDrawableHeight * cellVSpan;
-
- defaultPreview = Bitmap.createBitmap(bitmapWidth, bitmapHeight,
- Config.ARGB_8888);
- final Canvas c = mCachedAppWidgetPreviewCanvas.get();
- c.setBitmap(defaultPreview);
- previewDrawable.setBounds(0, 0, bitmapWidth, bitmapHeight);
- 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(bitmapWidth, bitmapHeight);
- 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 (bitmapWidth > maxWidth) {
- scale = maxWidth / (float) bitmapWidth;
- }
- if (scale != 1f) {
- bitmapWidth = (int) (scale * bitmapWidth);
- bitmapHeight = (int) (scale * bitmapHeight);
- }
-
- Bitmap preview = Bitmap.createBitmap(bitmapWidth, bitmapHeight,
- Config.ARGB_8888);
-
- // Draw the scaled preview into the final bitmap
- if (widgetPreviewExists) {
- renderDrawableToBitmap(drawable, preview, 0, 0, bitmapWidth,
- bitmapHeight);
- } 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(0, 0, preview.getWidth(), preview.getHeight());
-
- 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 void syncWidgetPageItems(final int page, final boolean immediate) {
int numItemsPerPage = mWidgetCountX * mWidgetCountY;
@@ -1475,6 +1220,11 @@
maxPreviewWidth = maxSize[0];
maxPreviewHeight = maxSize[1];
}
+
+ if (mWidgetPreviewLoader == null) {
+ mWidgetPreviewLoader = new WidgetPreviewLoader(
+ maxPreviewWidth, maxPreviewHeight, mLauncher, mWidgetSpacingLayout);
+ }
if (immediate) {
AsyncTaskPageData data = new AsyncTaskPageData(page, items,
maxPreviewWidth, maxPreviewHeight, null, null);
@@ -1513,23 +1263,7 @@
task.syncThreadPriority();
}
- Object rawInfo = items.get(i);
- if (rawInfo instanceof AppWidgetProviderInfo) {
- AppWidgetProviderInfo info = (AppWidgetProviderInfo) rawInfo;
- int[] cellSpans = Launcher.getSpanForWidget(mLauncher, info);
-
- int maxWidth = Math.min(data.maxImageWidth,
- mWidgetSpacingLayout.estimateCellWidth(cellSpans[0]));
- int maxHeight = Math.min(data.maxImageHeight,
- mWidgetSpacingLayout.estimateCellHeight(cellSpans[1]));
- Bitmap b = getWidgetPreview(info.provider, info.previewImage, info.icon,
- cellSpans[0], cellSpans[1], maxWidth, maxHeight);
- images.add(b);
- } else if (rawInfo instanceof ResolveInfo) {
- // Fill in the shortcuts information
- ResolveInfo info = (ResolveInfo) rawInfo;
- images.add(getShortcutPreview(info, data.maxImageWidth, data.maxImageHeight));
- }
+ images.add(mWidgetPreviewLoader.getPreview(items.get(i)));
}
}
@@ -1707,8 +1441,6 @@
}
}
- int newLeft = -1;
- int newRight = -1;
for (int i = 0; i < screenCount; i++) {
final View layout = (View) getPageAt(i);
diff --git a/src/com/android/launcher2/DragController.java b/src/com/android/launcher2/DragController.java
index 4c42953..3e586bf 100644
--- a/src/com/android/launcher2/DragController.java
+++ b/src/com/android/launcher2/DragController.java
@@ -175,16 +175,18 @@
* Makes dragging feel more precise, e.g. you can clip out a transparent border
*/
public void startDrag(View v, Bitmap bmp, DragSource source, Object dragInfo, int dragAction,
- Rect dragRegion, float initialDragViewScale) {
+ Point extraPadding, float initialDragViewScale) {
int[] loc = mCoordinatesTemp;
mLauncher.getDragLayer().getLocationInDragLayer(v, loc);
- int dragLayerX = loc[0] + v.getPaddingLeft() +
+ int viewExtraPaddingLeft = extraPadding != null ? extraPadding.x : 0;
+ int viewExtraPaddingTop = extraPadding != null ? extraPadding.y : 0;
+ int dragLayerX = loc[0] + v.getPaddingLeft() + viewExtraPaddingLeft +
(int) ((initialDragViewScale * bmp.getWidth() - bmp.getWidth()) / 2);
- int dragLayerY = loc[1] + v.getPaddingTop() +
+ int dragLayerY = loc[1] + v.getPaddingTop() + viewExtraPaddingTop +
(int) ((initialDragViewScale * bmp.getHeight() - bmp.getHeight()) / 2);
- startDrag(bmp, dragLayerX, dragLayerY, source, dragInfo, dragAction, null, dragRegion,
- initialDragViewScale);
+ startDrag(bmp, dragLayerX, dragLayerY, source, dragInfo, dragAction, null,
+ null, initialDragViewScale);
if (dragAction == DRAG_ACTION_MOVE) {
v.setVisibility(View.GONE);
diff --git a/src/com/android/launcher2/LauncherModel.java b/src/com/android/launcher2/LauncherModel.java
index ccf8328..9a5bd47 100644
--- a/src/com/android/launcher2/LauncherModel.java
+++ b/src/com/android/launcher2/LauncherModel.java
@@ -1988,6 +1988,7 @@
for (int i=0; i<N; i++) {
if (DEBUG_LOADERS) Log.d(TAG, "mAllAppsList.updatePackage " + packages[i]);
mBgAllAppsList.updatePackage(context, packages[i]);
+ WidgetPreviewLoader.removeFromDb(context, packages[i]);
}
break;
case OP_REMOVE:
@@ -1995,6 +1996,7 @@
for (int i=0; i<N; i++) {
if (DEBUG_LOADERS) Log.d(TAG, "mAllAppsList.removePackage " + packages[i]);
mBgAllAppsList.removePackage(packages[i]);
+ WidgetPreviewLoader.removeFromDb(context, packages[i]);
}
break;
}
diff --git a/src/com/android/launcher2/PackageChangedReceiver.java b/src/com/android/launcher2/PackageChangedReceiver.java
new file mode 100644
index 0000000..ce08b3a
--- /dev/null
+++ b/src/com/android/launcher2/PackageChangedReceiver.java
@@ -0,0 +1,18 @@
+package com.android.launcher2;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+public class PackageChangedReceiver extends BroadcastReceiver {
+ @Override
+ public void onReceive(final Context context, Intent intent) {
+ final String packageName = intent.getData().getSchemeSpecificPart();
+
+ if (packageName == null || packageName.length() == 0) {
+ // they sent us a bad intent
+ return;
+ }
+ WidgetPreviewLoader.removeFromDb(context, packageName);
+ }
+}
diff --git a/src/com/android/launcher2/PagedViewWidget.java b/src/com/android/launcher2/PagedViewWidget.java
index b804ab0..1ee1c4a 100644
--- a/src/com/android/launcher2/PagedViewWidget.java
+++ b/src/com/android/launcher2/PagedViewWidget.java
@@ -46,6 +46,7 @@
static PagedViewWidget sShortpressTarget = null;
boolean mIsAppWidget;
private final Rect mOriginalImagePadding = new Rect();
+ private Object mInfo;
public PagedViewWidget(Context context) {
this(context, null);
@@ -88,8 +89,8 @@
final ImageView image = (ImageView) findViewById(R.id.widget_preview);
if (image != null) {
FastBitmapDrawable preview = (FastBitmapDrawable) image.getDrawable();
- if (preview != null && preview.getBitmap() != null) {
- preview.getBitmap().recycle();
+ if (mInfo != null && preview != null && preview.getBitmap() != null) {
+ WidgetPreviewLoader.releaseBitmap(mInfo, preview.getBitmap());
}
image.setImageDrawable(null);
}
@@ -99,6 +100,7 @@
public void applyFromAppWidgetProviderInfo(AppWidgetProviderInfo info,
int maxWidth, int[] cellSpan) {
mIsAppWidget = true;
+ mInfo = info;
final ImageView image = (ImageView) findViewById(R.id.widget_preview);
if (maxWidth > -1) {
image.setMaxWidth(maxWidth);
@@ -116,6 +118,7 @@
public void applyFromResolveInfo(PackageManager pm, ResolveInfo info) {
mIsAppWidget = false;
+ mInfo = info;
CharSequence label = info.loadLabel(pm);
final ImageView image = (ImageView) findViewById(R.id.widget_preview);
image.setContentDescription(label);
diff --git a/src/com/android/launcher2/WidgetPreviewLoader.java b/src/com/android/launcher2/WidgetPreviewLoader.java
new file mode 100644
index 0000000..2d10967
--- /dev/null
+++ b/src/com/android/launcher2/WidgetPreviewLoader.java
@@ -0,0 +1,606 @@
+package com.android.launcher2;
+
+import android.appwidget.AppWidgetProviderInfo;
+import android.content.ComponentName;
+import android.content.ContentValues;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.content.res.Resources;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+import android.graphics.Bitmap;
+import android.graphics.Bitmap.Config;
+import android.graphics.BitmapFactory;
+import android.graphics.Canvas;
+import android.graphics.ColorMatrix;
+import android.graphics.ColorMatrixColorFilter;
+import android.graphics.Paint;
+import android.graphics.PorterDuff;
+import android.graphics.Rect;
+import android.graphics.Shader;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.os.AsyncTask;
+import android.util.Log;
+
+import com.android.launcher.R;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.lang.ref.SoftReference;
+import java.lang.ref.WeakReference;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+
+abstract class SoftReferenceThreadLocal<T> {
+ private ThreadLocal<SoftReference<T>> mThreadLocal;
+ public SoftReferenceThreadLocal() {
+ mThreadLocal = new ThreadLocal<SoftReference<T>>();
+ }
+
+ abstract T initialValue();
+
+ public void set(T t) {
+ mThreadLocal.set(new SoftReference<T>(t));
+ }
+
+ public T get() {
+ SoftReference<T> reference = mThreadLocal.get();
+ T obj;
+ if (reference == null) {
+ obj = initialValue();
+ mThreadLocal.set(new SoftReference<T>(obj));
+ return obj;
+ } else {
+ obj = reference.get();
+ if (obj == null) {
+ obj = initialValue();
+ mThreadLocal.set(new SoftReference<T>(obj));
+ }
+ return obj;
+ }
+ }
+}
+
+class CanvasCache extends SoftReferenceThreadLocal<Canvas> {
+ @Override
+ protected Canvas initialValue() {
+ return new Canvas();
+ }
+}
+
+class PaintCache extends SoftReferenceThreadLocal<Paint> {
+ @Override
+ protected Paint initialValue() {
+ return null;
+ }
+}
+
+class BitmapCache extends SoftReferenceThreadLocal<Bitmap> {
+ @Override
+ protected Bitmap initialValue() {
+ return null;
+ }
+}
+
+class RectCache extends SoftReferenceThreadLocal<Rect> {
+ @Override
+ protected Rect initialValue() {
+ return new Rect();
+ }
+}
+
+class BitmapFactoryOptionsCache extends SoftReferenceThreadLocal<BitmapFactory.Options> {
+ @Override
+ protected BitmapFactory.Options initialValue() {
+ return new BitmapFactory.Options();
+ }
+}
+
+public class WidgetPreviewLoader {
+ static final String TAG = "WidgetPreviewLoader";
+
+ private int mPreviewBitmapMaxWidth;
+ private int mPreviewBitmapMaxHeight;
+ private String mSize;
+ private Context mContext;
+ private Launcher mLauncher;
+ private PackageManager mPackageManager;
+ private PagedViewCellLayout mWidgetSpacingLayout;
+
+ // Used for drawing shortcut previews
+ private BitmapCache mCachedShortcutPreviewBitmap = new BitmapCache();
+ private PaintCache mCachedShortcutPreviewPaint = new PaintCache();
+ private CanvasCache mCachedShortcutPreviewCanvas = new CanvasCache();
+
+ // Used for drawing widget previews
+ private CanvasCache mCachedAppWidgetPreviewCanvas = new CanvasCache();
+ private RectCache mCachedAppWidgetPreviewSrcRect = new RectCache();
+ private RectCache mCachedAppWidgetPreviewDestRect = new RectCache();
+ private PaintCache mCachedAppWidgetPreviewPaint = new PaintCache();
+ private String mCachedSelectQuery;
+ private BitmapFactoryOptionsCache mCachedBitmapFactoryOptions = new BitmapFactoryOptionsCache();
+
+ private int mAppIconSize;
+ private IconCache mIconCache;
+
+ private final float sWidgetPreviewIconPaddingPercentage = 0.25f;
+
+ private WidgetPreviewCacheDb mDb;
+
+ private static HashMap<String, WeakReference<Bitmap>> sLoadedPreviews;
+ private static ArrayList<SoftReference<Bitmap>> sUnusedBitmaps;
+ private static HashSet<String> sInvalidPackages;
+
+ static {
+ sLoadedPreviews = new HashMap<String, WeakReference<Bitmap>>();
+ sUnusedBitmaps = new ArrayList<SoftReference<Bitmap>>();
+ sInvalidPackages = new HashSet<String>();
+ }
+
+ public WidgetPreviewLoader(int previewWidth, int previewHeight,
+ Launcher launcher, PagedViewCellLayout widgetSpacingLayout) {
+ mPreviewBitmapMaxWidth = previewWidth;
+ mPreviewBitmapMaxHeight = previewHeight;
+ mSize = previewWidth + "x" + previewHeight;
+ mContext = mLauncher = launcher;
+ mPackageManager = mContext.getPackageManager();
+ mAppIconSize = mContext.getResources().getDimensionPixelSize(R.dimen.app_icon_size);
+ mIconCache = ((LauncherApplication) launcher.getApplicationContext()).getIconCache();
+ mWidgetSpacingLayout = widgetSpacingLayout;
+ mDb = new WidgetPreviewCacheDb(mContext);
+ }
+
+ public Bitmap getPreview(final Object o) {
+ String name = getObjectName(o);
+ // check if the package is valid
+ boolean packageValid = true;
+ synchronized(sInvalidPackages) {
+ packageValid = !sInvalidPackages.contains(getObjectPackage(o));
+ }
+ if (!packageValid) {
+ return null;
+ }
+ if (packageValid) {
+ synchronized(sLoadedPreviews) {
+ // check if it exists in our existing cache
+ if (sLoadedPreviews.containsKey(name) && sLoadedPreviews.get(name).get() != null) {
+ return sLoadedPreviews.get(name).get();
+ }
+ }
+ }
+
+ Bitmap unusedBitmap = null;
+ synchronized(sUnusedBitmaps) {
+ // not in cache; we need to load it from the db
+ while ((unusedBitmap == null || !unusedBitmap.isMutable())
+ && sUnusedBitmaps.size() > 0) {
+ unusedBitmap = sUnusedBitmaps.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(mPreviewBitmapMaxWidth, mPreviewBitmapMaxHeight,
+ Bitmap.Config.ARGB_8888);
+ }
+
+ Bitmap preview = null;
+
+ if (packageValid) {
+ preview = readFromDb(name, unusedBitmap);
+ }
+
+ if (preview != null) {
+ synchronized(sLoadedPreviews) {
+ sLoadedPreviews.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(sLoadedPreviews) {
+ sLoadedPreviews.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;
+ }
+ }
+
+ public static void releaseBitmap(Object o, Bitmap bitmapToFree) {
+ // enable this code when doDecode doesn't force Bitmaps to become immutable
+ String name = getObjectName(o);
+ synchronized(sLoadedPreviews) {
+ synchronized(sUnusedBitmaps) {
+ Bitmap b = sLoadedPreviews.get(name).get();
+ if (b == bitmapToFree) {
+ sLoadedPreviews.remove(name);
+ if (bitmapToFree.isMutable()) {
+ sUnusedBitmaps.add(new SoftReference<Bitmap>(b));
+ }
+ } else {
+ throw new RuntimeException("Bitmap passed in doesn't match up");
+ }
+ }
+ }
+ }
+
+ static class WidgetPreviewCacheDb extends SQLiteOpenHelper {
+ final static int DB_VERSION = 1;
+ final static String DB_NAME = "widgetpreviews.db";
+ final static String TABLE_NAME = "shortcut_and_widget_previews";
+ final static String COLUMN_NAME = "name";
+ final static String COLUMN_SIZE = "size";
+ final static String COLUMN_PREVIEW_BITMAP = "preview_bitmap";
+ Context mContext;
+
+ public WidgetPreviewCacheDb(Context context) {
+ super(context, new File(context.getCacheDir(), DB_NAME).getPath(), null, DB_VERSION);
+ // Store the context for later use
+ mContext = context;
+ }
+
+ @Override
+ public void onCreate(SQLiteDatabase database) {
+ database.execSQL("CREATE TABLE " + TABLE_NAME + " (" +
+ COLUMN_NAME + " TEXT NOT NULL, " +
+ COLUMN_SIZE + " TEXT NOT NULL, " +
+ COLUMN_PREVIEW_BITMAP + " BLOB NOT NULL, " +
+ "PRIMARY KEY (" + COLUMN_NAME + ", " + COLUMN_SIZE + ") " +
+ ");");
+ }
+
+ @Override
+ public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+ // We are still only on version 1
+ }
+ }
+
+ private static final String WIDGET_PREFIX = "Widget:";
+ private static final String SHORTCUT_PREFIX = "Shortcut:";
+
+ private static String getObjectName(Object o) {
+ // should cache the string builder
+ StringBuilder sb = new StringBuilder();
+ String output;
+ if (o instanceof AppWidgetProviderInfo) {
+ sb.append(WIDGET_PREFIX);
+ sb.append(((AppWidgetProviderInfo) o).provider.flattenToString());
+ output = sb.toString();
+ sb.setLength(0);
+ } else {
+ sb.append(SHORTCUT_PREFIX);
+
+ ResolveInfo info = (ResolveInfo) o;
+ sb.append(new ComponentName(info.activityInfo.packageName,
+ info.activityInfo.name).flattenToString());
+ output = sb.toString();
+ sb.setLength(0);
+ }
+ return output;
+ }
+
+ private String getObjectPackage(Object o) {
+ if (o instanceof AppWidgetProviderInfo) {
+ return ((AppWidgetProviderInfo) o).provider.getPackageName();
+ } else {
+ ResolveInfo info = (ResolveInfo) o;
+ return info.activityInfo.packageName;
+ }
+ }
+
+ private void writeToDb(Object o, Bitmap preview) {
+ String name = getObjectName(o);
+ SQLiteDatabase db = mDb.getWritableDatabase();
+ ContentValues values = new ContentValues();
+
+ values.put(WidgetPreviewCacheDb.COLUMN_NAME, name);
+ ByteArrayOutputStream stream = new ByteArrayOutputStream();
+ preview.compress(Bitmap.CompressFormat.PNG, 100, stream);
+ values.put(WidgetPreviewCacheDb.COLUMN_PREVIEW_BITMAP, stream.toByteArray());
+ values.put(WidgetPreviewCacheDb.COLUMN_SIZE, mSize);
+ db.insert(WidgetPreviewCacheDb.TABLE_NAME, null, values);
+ }
+
+ public static void removeFromDb(final Context mContext, final String packageName) {
+ synchronized(sInvalidPackages) {
+ sInvalidPackages.add(packageName);
+ }
+ new AsyncTask<Void, Void, Void>() {
+ public Void doInBackground(Void ... args) {
+ SQLiteDatabase db = new WidgetPreviewCacheDb(mContext).getWritableDatabase();
+ db.delete(WidgetPreviewCacheDb.TABLE_NAME,
+ WidgetPreviewCacheDb.COLUMN_NAME + " LIKE ? OR " +
+ WidgetPreviewCacheDb.COLUMN_NAME + " LIKE ?", // SELECT query
+ new String[] {
+ WIDGET_PREFIX + packageName + "/%",
+ SHORTCUT_PREFIX + packageName + "/%"} // args to SELECT query
+ );
+ db.close();
+ synchronized(sInvalidPackages) {
+ sInvalidPackages.remove(packageName);
+ }
+ return null;
+ }
+ }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void) null);
+ }
+
+ private Bitmap readFromDb(String name, Bitmap b) {
+ if (mCachedSelectQuery == null) {
+ mCachedSelectQuery = WidgetPreviewCacheDb.COLUMN_NAME + " = ? AND " +
+ WidgetPreviewCacheDb.COLUMN_SIZE + " = ?";
+ }
+ SQLiteDatabase db = mDb.getReadableDatabase();
+ Cursor result = db.query(WidgetPreviewCacheDb.TABLE_NAME,
+ new String[] { WidgetPreviewCacheDb.COLUMN_PREVIEW_BITMAP }, // cols to return
+ mCachedSelectQuery, // select query
+ new String[] { name, mSize }, // args to select query
+ null,
+ null,
+ null,
+ null);
+ if (result.getCount() > 0) {
+ result.moveToFirst();
+ byte[] blob = result.getBlob(0);
+ result.close();
+ final BitmapFactory.Options opts = mCachedBitmapFactoryOptions.get();
+ opts.inBitmap = b;
+ opts.inSampleSize = 1;
+ Bitmap out = BitmapFactory.decodeByteArray(blob, 0, blob.length, opts);
+ return out;
+ } else {
+ result.close();
+ return null;
+ }
+ }
+
+ public Bitmap generatePreview(Object info, Bitmap preview) {
+ if (preview != null &&
+ (preview.getWidth() != mPreviewBitmapMaxWidth ||
+ preview.getHeight() != mPreviewBitmapMaxHeight)) {
+ throw new RuntimeException("Improperly sized bitmap passed as argument");
+ }
+ if (info instanceof AppWidgetProviderInfo) {
+ return generateWidgetPreview((AppWidgetProviderInfo) info, preview);
+ } else {
+ return generateShortcutPreview(
+ (ResolveInfo) info, mPreviewBitmapMaxWidth, mPreviewBitmapMaxHeight, preview);
+ }
+ }
+
+ public Bitmap generateWidgetPreview(AppWidgetProviderInfo info, Bitmap preview) {
+ // should just read what's in the DB, and return it
+ // what's the method that's used?
+ // going to have to track down more or less how the DB stuff works
+ // when you long click on something, we're going to have to load the bigger preview at that
+ // time (worry about it later)
+ int[] cellSpans = Launcher.getSpanForWidget(mLauncher, info);
+ int maxWidth = maxWidthForWidgetPreview(cellSpans[0]);
+ int maxHeight = maxHeightForWidgetPreview(cellSpans[1]);
+ return generateWidgetPreview(info.provider, info.previewImage, info.icon,
+ cellSpans[0], cellSpans[1], maxWidth, maxHeight, preview, null);
+ }
+
+ public int maxWidthForWidgetPreview(int spanX) {
+ return Math.min(mPreviewBitmapMaxWidth,
+ mWidgetSpacingLayout.estimateCellWidth(spanX));
+ }
+
+ public int maxHeightForWidgetPreview(int spanY) {
+ return Math.min(mPreviewBitmapMaxHeight,
+ mWidgetSpacingLayout.estimateCellHeight(spanY));
+ }
+
+ 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_preview_tile);
+ final int previewDrawableWidth = previewDrawable
+ .getIntrinsicWidth();
+ final int previewDrawableHeight = previewDrawable
+ .getIntrinsicHeight();
+ previewWidth = previewDrawableWidth * cellHSpan; // subtract 2 dips
+ 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, 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;
+ }
+
+ 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 static void renderDrawableToBitmap(
+ Drawable d, Bitmap bitmap, int x, int y, int w, int h) {
+ renderDrawableToBitmap(d, bitmap, x, y, w, h, 1f);
+ }
+
+ private static void renderDrawableToBitmap(
+ Drawable d, Bitmap bitmap, int x, int y, int w, int h,
+ float scale) {
+ if (bitmap != null) {
+ Canvas c = new Canvas(bitmap);
+ c.scale(scale, scale);
+ Rect oldBounds = d.copyBounds();
+ d.setBounds(x, y, x + w, y + h);
+ d.draw(c);
+ d.setBounds(oldBounds); // Restore the bounds
+ c.setBitmap(null);
+ }
+ }
+
+}