/* * Copyright (C) 2008 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.launcher3; import android.app.Activity; import android.content.ActivityNotFoundException; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.pm.ApplicationInfo; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; import android.content.pm.PackageManager.NameNotFoundException; import android.content.pm.ResolveInfo; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Matrix; import android.graphics.Paint; import android.graphics.PaintFlagsDrawFilter; import android.graphics.Rect; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; import android.graphics.drawable.PaintDrawable; import android.os.Build; import android.util.Log; import android.util.Pair; import android.util.SparseArray; import android.view.View; import android.widget.Toast; import java.util.ArrayList; /** * Various utilities shared amongst the Launcher's classes. */ public final class Utilities { private static final String TAG = "Launcher.Utilities"; private static int sIconWidth = -1; private static int sIconHeight = -1; public static int sIconTextureWidth = -1; public static int sIconTextureHeight = -1; private static final Rect sOldBounds = new Rect(); private static final Canvas sCanvas = new Canvas(); static { sCanvas.setDrawFilter(new PaintFlagsDrawFilter(Paint.DITHER_FLAG, Paint.FILTER_BITMAP_FLAG)); } static int sColors[] = { 0xffff0000, 0xff00ff00, 0xff0000ff }; static int sColorIndex = 0; static int[] sLoc0 = new int[2]; static int[] sLoc1 = new int[2]; // To turn on these properties, type // adb shell setprop log.tag.PROPERTY_NAME [VERBOSE | SUPPRESS] static final String FORCE_ENABLE_ROTATION_PROPERTY = "launcher_force_rotate"; public static boolean sForceEnableRotation = isPropertyEnabled(FORCE_ENABLE_ROTATION_PROPERTY); /** * Returns a FastBitmapDrawable with the icon, accurately sized. */ public static FastBitmapDrawable createIconDrawable(Bitmap icon) { FastBitmapDrawable d = new FastBitmapDrawable(icon); d.setFilterBitmap(true); resizeIconDrawable(d); return d; } /** * Resizes an icon drawable to the correct icon size. */ static void resizeIconDrawable(Drawable icon) { icon.setBounds(0, 0, sIconTextureWidth, sIconTextureHeight); } private static boolean isPropertyEnabled(String propertyName) { return Log.isLoggable(propertyName, Log.VERBOSE); } public static boolean isRotationEnabled(Context c) { boolean enableRotation = sForceEnableRotation || c.getResources().getBoolean(R.bool.allow_rotation); return enableRotation; } /** * Indicates if the device is running LMP or higher. */ public static boolean isLmpOrAbove() { return Build.VERSION.SDK_INT >= Build.VERSION_CODES.L; } /** * Returns a bitmap suitable for the all apps view. Used to convert pre-ICS * icon bitmaps that are stored in the database (which were 74x74 pixels at hdpi size) * to the proper size (48dp) */ static Bitmap createIconBitmap(Bitmap icon, Context context) { int textureWidth = sIconTextureWidth; int textureHeight = sIconTextureHeight; int sourceWidth = icon.getWidth(); int sourceHeight = icon.getHeight(); if (sourceWidth > textureWidth && sourceHeight > textureHeight) { // Icon is bigger than it should be; clip it (solves the GB->ICS migration case) return Bitmap.createBitmap(icon, (sourceWidth - textureWidth) / 2, (sourceHeight - textureHeight) / 2, textureWidth, textureHeight); } else if (sourceWidth == textureWidth && sourceHeight == textureHeight) { // Icon is the right size, no need to change it return icon; } else { // Icon is too small, render to a larger bitmap final Resources resources = context.getResources(); return createIconBitmap(new BitmapDrawable(resources, icon), context); } } /** * Returns a bitmap suitable for the all apps view. */ public static Bitmap createIconBitmap(Drawable icon, Context context) { synchronized (sCanvas) { // we share the statics :-( if (sIconWidth == -1) { initStatics(context); } int width = sIconWidth; int height = sIconHeight; if (icon instanceof PaintDrawable) { PaintDrawable painter = (PaintDrawable) icon; painter.setIntrinsicWidth(width); painter.setIntrinsicHeight(height); } else if (icon instanceof BitmapDrawable) { // Ensure the bitmap has a density. BitmapDrawable bitmapDrawable = (BitmapDrawable) icon; Bitmap bitmap = bitmapDrawable.getBitmap(); if (bitmap.getDensity() == Bitmap.DENSITY_NONE) { bitmapDrawable.setTargetDensity(context.getResources().getDisplayMetrics()); } } int sourceWidth = icon.getIntrinsicWidth(); int sourceHeight = icon.getIntrinsicHeight(); if (sourceWidth > 0 && sourceHeight > 0) { // Scale the icon proportionally to the icon dimensions final float ratio = (float) sourceWidth / sourceHeight; if (sourceWidth > sourceHeight) { height = (int) (width / ratio); } else if (sourceHeight > sourceWidth) { width = (int) (height * ratio); } } // no intrinsic size --> use default size int textureWidth = sIconTextureWidth; int textureHeight = sIconTextureHeight; final Bitmap bitmap = Bitmap.createBitmap(textureWidth, textureHeight, Bitmap.Config.ARGB_8888); final Canvas canvas = sCanvas; canvas.setBitmap(bitmap); final int left = (textureWidth-width) / 2; final int top = (textureHeight-height) / 2; @SuppressWarnings("all") // suppress dead code warning final boolean debug = false; if (debug) { // draw a big box for the icon for debugging canvas.drawColor(sColors[sColorIndex]); if (++sColorIndex >= sColors.length) sColorIndex = 0; Paint debugPaint = new Paint(); debugPaint.setColor(0xffcccc00); canvas.drawRect(left, top, left+width, top+height, debugPaint); } sOldBounds.set(icon.getBounds()); icon.setBounds(left, top, left+width, top+height); icon.draw(canvas); icon.setBounds(sOldBounds); canvas.setBitmap(null); return bitmap; } } /** * Returns a Bitmap representing the thumbnail of the specified Bitmap. * * @param bitmap The bitmap to get a thumbnail of. * @param context The application's context. * * @return A thumbnail for the specified bitmap or the bitmap itself if the * thumbnail could not be created. */ static Bitmap resampleIconBitmap(Bitmap bitmap, Context context) { synchronized (sCanvas) { // we share the statics :-( if (sIconWidth == -1) { initStatics(context); } if (bitmap.getWidth() == sIconWidth && bitmap.getHeight() == sIconHeight) { return bitmap; } else { final Resources resources = context.getResources(); return createIconBitmap(new BitmapDrawable(resources, bitmap), context); } } } /** * Given a coordinate relative to the descendant, find the coordinate in a parent view's * coordinates. * * @param descendant The descendant to which the passed coordinate is relative. * @param root The root view to make the coordinates relative to. * @param coord The coordinate that we want mapped. * @param includeRootScroll Whether or not to account for the scroll of the descendant: * sometimes this is relevant as in a child's coordinates within the descendant. * @return The factor by which this descendant is scaled relative to this DragLayer. Caution * this scale factor is assumed to be equal in X and Y, and so if at any point this * assumption fails, we will need to return a pair of scale factors. */ public static float getDescendantCoordRelativeToParent(View descendant, View root, int[] coord, boolean includeRootScroll) { ArrayList ancestorChain = new ArrayList(); float[] pt = {coord[0], coord[1]}; View v = descendant; while(v != root && v != null) { ancestorChain.add(v); v = (View) v.getParent(); } ancestorChain.add(root); float scale = 1.0f; int count = ancestorChain.size(); for (int i = 0; i < count; i++) { View v0 = ancestorChain.get(i); // For TextViews, scroll has a meaning which relates to the text position // which is very strange... ignore the scroll. if (v0 != descendant || includeRootScroll) { pt[0] -= v0.getScrollX(); pt[1] -= v0.getScrollY(); } v0.getMatrix().mapPoints(pt); pt[0] += v0.getLeft(); pt[1] += v0.getTop(); scale *= v0.getScaleX(); } coord[0] = (int) Math.round(pt[0]); coord[1] = (int) Math.round(pt[1]); return scale; } /** * Inverse of {@link #getDescendantCoordRelativeToSelf(View, int[])}. */ public static float mapCoordInSelfToDescendent(View descendant, View root, int[] coord) { ArrayList ancestorChain = new ArrayList(); float[] pt = {coord[0], coord[1]}; View v = descendant; while(v != root) { ancestorChain.add(v); v = (View) v.getParent(); } ancestorChain.add(root); float scale = 1.0f; Matrix inverse = new Matrix(); int count = ancestorChain.size(); for (int i = count - 1; i >= 0; i--) { View ancestor = ancestorChain.get(i); View next = i > 0 ? ancestorChain.get(i-1) : null; pt[0] += ancestor.getScrollX(); pt[1] += ancestor.getScrollY(); if (next != null) { pt[0] -= next.getLeft(); pt[1] -= next.getTop(); next.getMatrix().invert(inverse); inverse.mapPoints(pt); scale *= next.getScaleX(); } } coord[0] = (int) Math.round(pt[0]); coord[1] = (int) Math.round(pt[1]); return scale; } /** * Utility method to determine whether the given point, in local coordinates, * is inside the view, where the area of the view is expanded by the slop factor. * This method is called while processing touch-move events to determine if the event * is still within the view. */ public static boolean pointInView(View v, float localX, float localY, float slop) { return localX >= -slop && localY >= -slop && localX < (v.getWidth() + slop) && localY < (v.getHeight() + slop); } private static void initStatics(Context context) { final Resources resources = context.getResources(); sIconWidth = sIconHeight = (int) resources.getDimension(R.dimen.app_icon_size); sIconTextureWidth = sIconTextureHeight = sIconWidth; } public static void setIconSize(int widthPx) { sIconWidth = sIconHeight = widthPx; sIconTextureWidth = sIconTextureHeight = widthPx; } public static void scaleRect(Rect r, float scale) { if (scale != 1.0f) { r.left = (int) (r.left * scale + 0.5f); r.top = (int) (r.top * scale + 0.5f); r.right = (int) (r.right * scale + 0.5f); r.bottom = (int) (r.bottom * scale + 0.5f); } } public static int[] getCenterDeltaInScreenSpace(View v0, View v1, int[] delta) { v0.getLocationInWindow(sLoc0); v1.getLocationInWindow(sLoc1); sLoc0[0] += (v0.getMeasuredWidth() * v0.getScaleX()) / 2; sLoc0[1] += (v0.getMeasuredHeight() * v0.getScaleY()) / 2; sLoc1[0] += (v1.getMeasuredWidth() * v1.getScaleX()) / 2; sLoc1[1] += (v1.getMeasuredHeight() * v1.getScaleY()) / 2; if (delta == null) { delta = new int[2]; } delta[0] = sLoc1[0] - sLoc0[0]; delta[1] = sLoc1[1] - sLoc0[1]; return delta; } public static void scaleRectAboutCenter(Rect r, float scale) { int cx = r.centerX(); int cy = r.centerY(); r.offset(-cx, -cy); Utilities.scaleRect(r, scale); r.offset(cx, cy); } public static void startActivityForResultSafely( Activity activity, Intent intent, int requestCode) { try { activity.startActivityForResult(intent, requestCode); } catch (ActivityNotFoundException e) { Toast.makeText(activity, R.string.activity_not_found, Toast.LENGTH_SHORT).show(); } catch (SecurityException e) { Toast.makeText(activity, R.string.activity_not_found, Toast.LENGTH_SHORT).show(); Log.e(TAG, "Launcher does not have the permission to launch " + intent + ". Make sure to create a MAIN intent-filter for the corresponding activity " + "or use the exported attribute for this activity.", e); } } static boolean isSystemApp(Context context, Intent intent) { PackageManager pm = context.getPackageManager(); ComponentName cn = intent.getComponent(); String packageName = null; if (cn == null) { ResolveInfo info = pm.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY); if ((info != null) && (info.activityInfo != null)) { packageName = info.activityInfo.packageName; } } else { packageName = cn.getPackageName(); } if (packageName != null) { try { PackageInfo info = pm.getPackageInfo(packageName, 0); return (info != null) && (info.applicationInfo != null) && ((info.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0); } catch (NameNotFoundException e) { return false; } } else { return false; } } /** * This picks a dominant color, looking for high-saturation, high-value, repeated hues. * @param bitmap The bitmap to scan * @param samples The approximate max number of samples to use. */ static int findDominantColorByHue(Bitmap bitmap, int samples) { final int height = bitmap.getHeight(); final int width = bitmap.getWidth(); int sampleStride = (int) Math.sqrt((height * width) / samples); if (sampleStride < 1) { sampleStride = 1; } // This is an out-param, for getting the hsv values for an rgb float[] hsv = new float[3]; // First get the best hue, by creating a histogram over 360 hue buckets, // where each pixel contributes a score weighted by saturation, value, and alpha. float[] hueScoreHistogram = new float[360]; float highScore = -1; int bestHue = -1; for (int y = 0; y < height; y += sampleStride) { for (int x = 0; x < width; x += sampleStride) { int argb = bitmap.getPixel(x, y); int alpha = 0xFF & (argb >> 24); if (alpha < 0x80) { // Drop mostly-transparent pixels. continue; } // Remove the alpha channel. int rgb = argb | 0xFF000000; Color.colorToHSV(rgb, hsv); // Bucket colors by the 360 integer hues. int hue = (int) hsv[0]; if (hue < 0 || hue >= hueScoreHistogram.length) { // Defensively avoid array bounds violations. continue; } float score = hsv[1] * hsv[2]; hueScoreHistogram[hue] += score; if (hueScoreHistogram[hue] > highScore) { highScore = hueScoreHistogram[hue]; bestHue = hue; } } } SparseArray rgbScores = new SparseArray(); int bestColor = 0xff000000; highScore = -1; // Go back over the RGB colors that match the winning hue, // creating a histogram of weighted s*v scores, for up to 100*100 [s,v] buckets. // The highest-scoring RGB color wins. for (int y = 0; y < height; y += sampleStride) { for (int x = 0; x < width; x += sampleStride) { int rgb = bitmap.getPixel(x, y) | 0xff000000; Color.colorToHSV(rgb, hsv); int hue = (int) hsv[0]; if (hue == bestHue) { float s = hsv[1]; float v = hsv[2]; int bucket = (int) (s * 100) + (int) (v * 10000); // Score by cumulative saturation * value. float score = s * v; Float oldTotal = rgbScores.get(bucket); float newTotal = oldTotal == null ? score : oldTotal + score; rgbScores.put(bucket, newTotal); if (newTotal > highScore) { highScore = newTotal; // All the colors in the winning bucket are very similar. Last in wins. bestColor = rgb; } } } } return bestColor; } /* * Finds a system apk which had a broadcast receiver listening to a particular action. * @param action intent action used to find the apk * @return a pair of apk package name and the resources. */ static Pair findSystemApk(String action, PackageManager pm) { final Intent intent = new Intent(action); for (ResolveInfo info : pm.queryBroadcastReceivers(intent, 0)) { if (info.activityInfo != null && (info.activityInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) { final String packageName = info.activityInfo.packageName; try { final Resources res = pm.getResourcesForApplication(packageName); return Pair.create(packageName, res); } catch (NameNotFoundException e) { Log.w(TAG, "Failed to find resources for " + packageName); } } } return null; } }