| /* |
| * 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.annotation.TargetApi; |
| import android.app.Activity; |
| import android.app.WallpaperManager; |
| import android.content.ActivityNotFoundException; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.SharedPreferences; |
| 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.content.res.TypedArray; |
| import android.database.Cursor; |
| import android.graphics.Bitmap; |
| import android.graphics.BitmapFactory; |
| 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.RectF; |
| import android.graphics.drawable.BitmapDrawable; |
| import android.graphics.drawable.Drawable; |
| import android.graphics.drawable.PaintDrawable; |
| import android.os.Build; |
| import android.os.Build.VERSION; |
| import android.os.Bundle; |
| import android.os.PowerManager; |
| import android.text.Spannable; |
| import android.text.SpannableString; |
| import android.text.TextUtils; |
| import android.text.style.TtsSpan; |
| import android.util.DisplayMetrics; |
| import android.util.Log; |
| import android.util.Pair; |
| import android.util.SparseArray; |
| import android.util.TypedValue; |
| import android.view.MotionEvent; |
| import android.view.View; |
| import android.view.ViewParent; |
| import android.widget.Toast; |
| |
| import com.android.launcher3.compat.UserHandleCompat; |
| import com.android.launcher3.config.FeatureFlags; |
| import com.android.launcher3.config.ProviderConfig; |
| import com.android.launcher3.graphics.ShadowGenerator; |
| import com.android.launcher3.util.IconNormalizer; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.Closeable; |
| import java.io.IOException; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Locale; |
| import java.util.Set; |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.LinkedBlockingQueue; |
| import java.util.concurrent.ThreadPoolExecutor; |
| import java.util.concurrent.TimeUnit; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| /** |
| * Various utilities shared amongst the Launcher's classes. |
| */ |
| public final class Utilities { |
| |
| private static final String TAG = "Launcher.Utilities"; |
| |
| private static final Rect sOldBounds = new Rect(); |
| private static final Canvas sCanvas = new Canvas(); |
| |
| private static final Pattern sTrimPattern = |
| Pattern.compile("^[\\s|\\p{javaSpaceChar}]*(.*)[\\s|\\p{javaSpaceChar}]*$"); |
| |
| static { |
| sCanvas.setDrawFilter(new PaintFlagsDrawFilter(Paint.DITHER_FLAG, |
| Paint.FILTER_BITMAP_FLAG)); |
| } |
| static int sColors[] = { 0xffff0000, 0xff00ff00, 0xff0000ff }; |
| static int sColorIndex = 0; |
| |
| private static final int[] sLoc0 = new int[2]; |
| private static final int[] sLoc1 = new int[2]; |
| |
| public static boolean isNycMR1OrAbove() { |
| // TODO: Use the check from support lib |
| return !"REL".equals(VERSION.CODENAME) |
| && "NMR1".compareTo(VERSION.CODENAME) <= 0; |
| } |
| |
| public static final boolean ATLEAST_MARSHMALLOW = |
| Build.VERSION.SDK_INT >= Build.VERSION_CODES.M; |
| |
| public static final boolean ATLEAST_LOLLIPOP_MR1 = |
| Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1; |
| |
| public static final boolean ATLEAST_LOLLIPOP = |
| Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP; |
| |
| public static final boolean ATLEAST_KITKAT = |
| Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT; |
| |
| public static final boolean ATLEAST_JB_MR1 = |
| Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1; |
| |
| public static final boolean ATLEAST_JB_MR2 = |
| Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2; |
| |
| // An intent extra to indicate the horizontal scroll of the wallpaper. |
| public static final String EXTRA_WALLPAPER_OFFSET = "com.android.launcher3.WALLPAPER_OFFSET"; |
| |
| // These values are same as that in {@link AsyncTask}. |
| private static final int CPU_COUNT = Runtime.getRuntime().availableProcessors(); |
| private static final int CORE_POOL_SIZE = CPU_COUNT + 1; |
| private static final int MAXIMUM_POOL_SIZE = CPU_COUNT * 2 + 1; |
| private static final int KEEP_ALIVE = 1; |
| /** |
| * An {@link Executor} to be used with async task with no limit on the queue size. |
| */ |
| public static final Executor THREAD_POOL_EXECUTOR = new ThreadPoolExecutor( |
| CORE_POOL_SIZE, MAXIMUM_POOL_SIZE, KEEP_ALIVE, |
| TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>()); |
| |
| public static final String ALLOW_ROTATION_PREFERENCE_KEY = "pref_allowRotation"; |
| |
| public static boolean isPropertyEnabled(String propertyName) { |
| return Log.isLoggable(propertyName, Log.VERBOSE); |
| } |
| |
| public static boolean isAllowRotationPrefEnabled(Context context) { |
| return getPrefs(context).getBoolean(ALLOW_ROTATION_PREFERENCE_KEY, |
| getAllowRotationDefaultValue(context)); |
| } |
| |
| public static boolean getAllowRotationDefaultValue(Context context) { |
| if (isNycOrAbove()) { |
| // If the device was scaled, used the original dimensions to determine if rotation |
| // is allowed of not. |
| try { |
| // TODO: Use the actual field when the API is finalized. |
| int originalDensity = |
| DisplayMetrics.class.getField("DENSITY_DEVICE_STABLE").getInt(null); |
| Resources res = context.getResources(); |
| int originalSmallestWidth = res.getConfiguration().smallestScreenWidthDp |
| * res.getDisplayMetrics().densityDpi / originalDensity; |
| return originalSmallestWidth >= 600; |
| } catch (Exception e) { |
| // Ignore |
| } |
| } |
| return false; |
| } |
| |
| public static boolean isNycOrAbove() { |
| // TODO(vadimt): Replace using reflection with looking at the API version once |
| // Build.VERSION.SDK_INT gets bumped to 24. b/22942492. |
| try { |
| View.class.getDeclaredField("DRAG_FLAG_OPAQUE"); |
| // View.DRAG_FLAG_OPAQUE doesn't exist in M-release, so it's an indication of N+. |
| return true; |
| } catch (NoSuchFieldException e) { |
| return false; |
| } |
| } |
| |
| // TODO: Use Intent.ACTION_APPLICATION_PREFERENCES when N SDK is available. |
| public static final String ACTION_APPLICATION_PREFERENCES |
| = "android.intent.action.APPLICATION_PREFERENCES"; |
| |
| public static Bitmap createIconBitmap(Cursor c, int iconIndex, Context context) { |
| byte[] data = c.getBlob(iconIndex); |
| try { |
| return createIconBitmap(BitmapFactory.decodeByteArray(data, 0, data.length), context); |
| } catch (Exception e) { |
| return null; |
| } |
| } |
| |
| /** |
| * Returns a bitmap suitable for the all apps view. If the package or the resource do not |
| * exist, it returns null. |
| */ |
| public static Bitmap createIconBitmap(String packageName, String resourceName, |
| Context context) { |
| PackageManager packageManager = context.getPackageManager(); |
| // the resource |
| try { |
| Resources resources = packageManager.getResourcesForApplication(packageName); |
| if (resources != null) { |
| final int id = resources.getIdentifier(resourceName, null, null); |
| return createIconBitmap( |
| resources.getDrawableForDensity(id, LauncherAppState.getInstance() |
| .getInvariantDeviceProfile().fillResIconDpi), context); |
| } |
| } catch (Exception e) { |
| // Icon not found. |
| } |
| return null; |
| } |
| |
| private static int getIconBitmapSize() { |
| return LauncherAppState.getInstance().getInvariantDeviceProfile().iconBitmapSize; |
| } |
| |
| /** |
| * Returns a bitmap which is of the appropriate size to be displayed as an icon |
| */ |
| public static Bitmap createIconBitmap(Bitmap icon, Context context) { |
| final int iconBitmapSize = getIconBitmapSize(); |
| if (iconBitmapSize == icon.getWidth() && iconBitmapSize == icon.getHeight()) { |
| return icon; |
| } |
| return createIconBitmap(new BitmapDrawable(context.getResources(), icon), context); |
| } |
| |
| /** |
| * Returns a bitmap suitable for the all apps view. The icon is badged for {@param user}. |
| * The bitmap is also visually normalized with other icons. |
| */ |
| @TargetApi(Build.VERSION_CODES.LOLLIPOP) |
| public static Bitmap createBadgedIconBitmap( |
| Drawable icon, UserHandleCompat user, Context context) { |
| float scale = FeatureFlags.LAUNCHER3_DISABLE_ICON_NORMALIZATION ? |
| 1 : IconNormalizer.getInstance().getScale(icon, null); |
| Bitmap bitmap = createIconBitmap(icon, context, scale); |
| return badgeIconForUser(bitmap, user, context); |
| } |
| |
| /** |
| * Badges the provided icon with the user badge if required. |
| */ |
| public static Bitmap badgeIconForUser(Bitmap icon, UserHandleCompat user, Context context) { |
| if (Utilities.ATLEAST_LOLLIPOP && user != null |
| && !UserHandleCompat.myUserHandle().equals(user)) { |
| BitmapDrawable drawable = new FixedSizeBitmapDrawable(icon); |
| Drawable badged = context.getPackageManager().getUserBadgedIcon( |
| drawable, user.getUser()); |
| if (badged instanceof BitmapDrawable) { |
| return ((BitmapDrawable) badged).getBitmap(); |
| } else { |
| return createIconBitmap(badged, context); |
| } |
| } else { |
| return icon; |
| } |
| } |
| |
| /** |
| * Creates a normalized bitmap suitable for the all apps view. The bitmap is also visually |
| * normalized with other icons and has enough spacing to add shadow. |
| */ |
| public static Bitmap createScaledBitmapWithoutShadow(Drawable icon, Context context) { |
| RectF iconBounds = new RectF(); |
| float scale = FeatureFlags.LAUNCHER3_DISABLE_ICON_NORMALIZATION ? |
| 1 : IconNormalizer.getInstance().getScale(icon, iconBounds); |
| scale = Math.min(scale, ShadowGenerator.getScaleForBounds(iconBounds)); |
| return createIconBitmap(icon, context, scale); |
| } |
| |
| /** |
| * Adds a shadow to the provided icon. It assumes that the icon has already been scaled using |
| * {@link #createScaledBitmapWithoutShadow(Drawable, Context)} |
| */ |
| public static Bitmap addShadowToIcon(Bitmap icon) { |
| return ShadowGenerator.getInstance().recreateIcon(icon); |
| } |
| |
| /** |
| * Adds the {@param badge} on top of {@param srcTgt} using the badge dimensions. |
| */ |
| @TargetApi(Build.VERSION_CODES.LOLLIPOP) |
| public static Bitmap badgeWithBitmap(Bitmap srcTgt, Bitmap badge, Context context) { |
| int badgeSize = context.getResources().getDimensionPixelSize(R.dimen.profile_badge_size); |
| synchronized (sCanvas) { |
| sCanvas.setBitmap(srcTgt); |
| sCanvas.drawBitmap(badge, new Rect(0, 0, badge.getWidth(), badge.getHeight()), |
| new Rect(srcTgt.getWidth() - badgeSize, |
| srcTgt.getHeight() - badgeSize, srcTgt.getWidth(), srcTgt.getHeight()), |
| new Paint(Paint.FILTER_BITMAP_FLAG)); |
| sCanvas.setBitmap(null); |
| } |
| return srcTgt; |
| } |
| |
| /** |
| * Returns a bitmap suitable for the all apps view. |
| */ |
| public static Bitmap createIconBitmap(Drawable icon, Context context) { |
| return createIconBitmap(icon, context, 1.0f /* scale */); |
| } |
| |
| /** |
| * @param scale the scale to apply before drawing {@param icon} on the canvas |
| */ |
| public static Bitmap createIconBitmap(Drawable icon, Context context, float scale) { |
| synchronized (sCanvas) { |
| final int iconBitmapSize = getIconBitmapSize(); |
| |
| int width = iconBitmapSize; |
| int height = iconBitmapSize; |
| |
| 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 != null && 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 = iconBitmapSize; |
| int textureHeight = iconBitmapSize; |
| |
| 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); |
| canvas.save(Canvas.MATRIX_SAVE_FLAG); |
| canvas.scale(scale, scale, textureWidth / 2, textureHeight / 2); |
| icon.draw(canvas); |
| canvas.restore(); |
| icon.setBounds(sOldBounds); |
| canvas.setBitmap(null); |
| |
| return bitmap; |
| } |
| } |
| |
| /** |
| * 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 ancestor 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 getDescendantCoordRelativeToAncestor( |
| View descendant, View ancestor, int[] coord, boolean includeRootScroll) { |
| float[] pt = {coord[0], coord[1]}; |
| float scale = 1.0f; |
| View v = descendant; |
| while(v != ancestor && v != null) { |
| // For TextViews, scroll has a meaning which relates to the text position |
| // which is very strange... ignore the scroll. |
| if (v != descendant || includeRootScroll) { |
| pt[0] -= v.getScrollX(); |
| pt[1] -= v.getScrollY(); |
| } |
| |
| v.getMatrix().mapPoints(pt); |
| pt[0] += v.getLeft(); |
| pt[1] += v.getTop(); |
| scale *= v.getScaleX(); |
| |
| v = (View) v.getParent(); |
| } |
| |
| coord[0] = Math.round(pt[0]); |
| coord[1] = Math.round(pt[1]); |
| return scale; |
| } |
| |
| /** |
| * Inverse of {@link #getDescendantCoordRelativeToAncestor(View, View, int[], boolean)}. |
| */ |
| public static float mapCoordInSelfToDescendent(View descendant, View root, |
| int[] coord) { |
| ArrayList<View> ancestorChain = new ArrayList<View>(); |
| |
| 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); |
| } |
| |
| /** Translates MotionEvents from src's coordinate system to dst's. */ |
| public static void translateEventCoordinates(View src, View dst, MotionEvent dstEvent) { |
| toGlobalMotionEvent(src, dstEvent); |
| toLocalMotionEvent(dst, dstEvent); |
| } |
| |
| /** |
| * Emulates View.toGlobalMotionEvent(). This implementation does not handle transformations |
| * (scaleX, scaleY, etc). |
| */ |
| private static void toGlobalMotionEvent(View view, MotionEvent event) { |
| view.getLocationOnScreen(sLoc0); |
| event.offsetLocation(sLoc0[0], sLoc0[1]); |
| } |
| |
| /** |
| * Emulates View.toLocalMotionEvent(). This implementation does not handle transformations |
| * (scaleX, scaleY, etc). |
| */ |
| private static void toLocalMotionEvent(View view, MotionEvent event) { |
| view.getLocationOnScreen(sLoc0); |
| event.offsetLocation(-sLoc0[0], -sLoc0[1]); |
| } |
| |
| 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) { |
| if (scale != 1.0f) { |
| int cx = r.centerX(); |
| int cy = r.centerY(); |
| r.offset(-cx, -cy); |
| |
| 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); |
| |
| 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<Float> rgbScores = new SparseArray<Float>(); |
| 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<String, Resources> 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; |
| } |
| |
| /** |
| * Compresses the bitmap to a byte array for serialization. |
| */ |
| public static byte[] flattenBitmap(Bitmap bitmap) { |
| // Try go guesstimate how much space the icon will take when serialized |
| // to avoid unnecessary allocations/copies during the write. |
| int size = bitmap.getWidth() * bitmap.getHeight() * 4; |
| ByteArrayOutputStream out = new ByteArrayOutputStream(size); |
| try { |
| bitmap.compress(Bitmap.CompressFormat.PNG, 100, out); |
| out.flush(); |
| out.close(); |
| return out.toByteArray(); |
| } catch (IOException e) { |
| Log.w(TAG, "Could not write bitmap"); |
| return null; |
| } |
| } |
| |
| /** |
| * Trims the string, removing all whitespace at the beginning and end of the string. |
| * Non-breaking whitespaces are also removed. |
| */ |
| public static String trim(CharSequence s) { |
| if (s == null) { |
| return null; |
| } |
| |
| // Just strip any sequence of whitespace or java space characters from the beginning and end |
| Matcher m = sTrimPattern.matcher(s); |
| return m.replaceAll("$1"); |
| } |
| |
| /** |
| * Calculates the height of a given string at a specific text size. |
| */ |
| public static float calculateTextHeight(float textSizePx) { |
| Paint p = new Paint(); |
| p.setTextSize(textSizePx); |
| Paint.FontMetrics fm = p.getFontMetrics(); |
| return -fm.top + fm.bottom; |
| } |
| |
| /** |
| * Convenience println with multiple args. |
| */ |
| public static void println(String key, Object... args) { |
| StringBuilder b = new StringBuilder(); |
| b.append(key); |
| b.append(": "); |
| boolean isFirstArgument = true; |
| for (Object arg : args) { |
| if (isFirstArgument) { |
| isFirstArgument = false; |
| } else { |
| b.append(", "); |
| } |
| b.append(arg); |
| } |
| System.out.println(b.toString()); |
| } |
| |
| @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1) |
| public static boolean isRtl(Resources res) { |
| return ATLEAST_JB_MR1 && |
| (res.getConfiguration().getLayoutDirection() == View.LAYOUT_DIRECTION_RTL); |
| } |
| |
| /** |
| * Returns true if the intent is a valid launch intent for a launcher activity of an app. |
| * This is used to identify shortcuts which are different from the ones exposed by the |
| * applications' manifest file. |
| * |
| * @param launchIntent The intent that will be launched when the shortcut is clicked. |
| */ |
| public static boolean isLauncherAppTarget(Intent launchIntent) { |
| if (launchIntent != null |
| && Intent.ACTION_MAIN.equals(launchIntent.getAction()) |
| && launchIntent.getComponent() != null |
| && launchIntent.getCategories() != null |
| && launchIntent.getCategories().size() == 1 |
| && launchIntent.hasCategory(Intent.CATEGORY_LAUNCHER) |
| && TextUtils.isEmpty(launchIntent.getDataString())) { |
| // An app target can either have no extra or have ItemInfo.EXTRA_PROFILE. |
| Bundle extras = launchIntent.getExtras(); |
| if (extras == null) { |
| return true; |
| } else { |
| Set<String> keys = extras.keySet(); |
| return keys.size() == 1 && keys.contains(ItemInfo.EXTRA_PROFILE); |
| } |
| }; |
| return false; |
| } |
| |
| public static float dpiFromPx(int size, DisplayMetrics metrics){ |
| float densityRatio = (float) metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT; |
| return (size / densityRatio); |
| } |
| public static int pxFromDp(float size, DisplayMetrics metrics) { |
| return (int) Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, |
| size, metrics)); |
| } |
| public static int pxFromSp(float size, DisplayMetrics metrics) { |
| return (int) Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, |
| size, metrics)); |
| } |
| |
| public static String createDbSelectionQuery(String columnName, Iterable<?> values) { |
| return String.format(Locale.ENGLISH, "%s IN (%s)", columnName, TextUtils.join(", ", values)); |
| } |
| |
| public static boolean isBootCompleted() { |
| try { |
| Class clazz = Class.forName("android.os.SystemProperties"); |
| Method getter = clazz.getDeclaredMethod("get", String.class); |
| String value = (String) getter.invoke(null, "sys.boot_completed"); |
| return "1".equals(value); |
| } catch (Exception e) { |
| Log.d(TAG, "Unable to read system properties"); |
| // Assume that boot has completed |
| return true; |
| } |
| } |
| |
| /** |
| * Ensures that a value is within given bounds. Specifically: |
| * If value is less than lowerBound, return lowerBound; else if value is greater than upperBound, |
| * return upperBound; else return value unchanged. |
| */ |
| public static int boundToRange(int value, int lowerBound, int upperBound) { |
| return Math.max(lowerBound, Math.min(value, upperBound)); |
| } |
| |
| /** |
| * @see #boundToRange(int, int, int). |
| */ |
| public static float boundToRange(float value, float lowerBound, float upperBound) { |
| return Math.max(lowerBound, Math.min(value, upperBound)); |
| } |
| |
| /** |
| * Wraps a message with a TTS span, so that a different message is spoken than |
| * what is getting displayed. |
| * @param msg original message |
| * @param ttsMsg message to be spoken |
| */ |
| @TargetApi(Build.VERSION_CODES.LOLLIPOP) |
| public static CharSequence wrapForTts(CharSequence msg, String ttsMsg) { |
| if (Utilities.ATLEAST_LOLLIPOP) { |
| SpannableString spanned = new SpannableString(msg); |
| spanned.setSpan(new TtsSpan.TextBuilder(ttsMsg).build(), |
| 0, spanned.length(), Spannable.SPAN_INCLUSIVE_INCLUSIVE); |
| return spanned; |
| } else { |
| return msg; |
| } |
| } |
| |
| /** |
| * Replacement for Long.compare() which was added in API level 19. |
| */ |
| public static int longCompare(long lhs, long rhs) { |
| return lhs < rhs ? -1 : (lhs == rhs ? 0 : 1); |
| } |
| |
| public static SharedPreferences getPrefs(Context context) { |
| return context.getSharedPreferences( |
| LauncherFiles.SHARED_PREFERENCES_KEY, Context.MODE_PRIVATE); |
| } |
| |
| @TargetApi(Build.VERSION_CODES.LOLLIPOP) |
| public static boolean isPowerSaverOn(Context context) { |
| PowerManager powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE); |
| return ATLEAST_LOLLIPOP && powerManager.isPowerSaveMode(); |
| } |
| |
| public static boolean isWallapaperAllowed(Context context) { |
| if (isNycOrAbove()) { |
| try { |
| WallpaperManager wm = context.getSystemService(WallpaperManager.class); |
| return (Boolean) wm.getClass().getDeclaredMethod("isSetWallpaperAllowed") |
| .invoke(wm); |
| } catch (Exception e) { } |
| } |
| return true; |
| } |
| |
| public static void closeSilently(Closeable c) { |
| if (c != null) { |
| try { |
| c.close(); |
| } catch (IOException e) { |
| if (ProviderConfig.IS_DOGFOOD_BUILD) { |
| Log.d(TAG, "Error closing", e); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Returns true if {@param original} contains all entries defined in {@param updates} and |
| * have the same value. |
| * The comparison uses {@link Object#equals(Object)} to compare the values. |
| */ |
| public static boolean containsAll(Bundle original, Bundle updates) { |
| for (String key : updates.keySet()) { |
| Object value1 = updates.get(key); |
| Object value2 = original.get(key); |
| if (value1 == null) { |
| if (value2 != null) { |
| return false; |
| } |
| } else if (!value1.equals(value2)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** Returns whether the collection is null or empty. */ |
| public static boolean isEmpty(Collection c) { |
| return c == null || c.isEmpty(); |
| } |
| |
| /** |
| * An extension of {@link BitmapDrawable} which returns the bitmap pixel size as intrinsic size. |
| * This allows the badging to be done based on the action bitmap size rather than |
| * the scaled bitmap size. |
| */ |
| private static class FixedSizeBitmapDrawable extends BitmapDrawable { |
| |
| public FixedSizeBitmapDrawable(Bitmap bitmap) { |
| super(null, bitmap); |
| } |
| |
| @Override |
| public int getIntrinsicHeight() { |
| return getBitmap().getWidth(); |
| } |
| |
| @Override |
| public int getIntrinsicWidth() { |
| return getBitmap().getWidth(); |
| } |
| } |
| |
| public static int getColorAccent(Context context) { |
| TypedArray ta = context.obtainStyledAttributes(new int[]{android.R.attr.colorAccent}); |
| int colorAccent = ta.getColor(0, 0); |
| ta.recycle(); |
| return colorAccent; |
| } |
| } |
