/* * 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.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.accessibility.AccessibilityEvent; import android.view.accessibility.AccessibilityManager; 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.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() { return Build.VERSION.SDK_INT >= Build.VERSION_CODES.N_MR1; } public static boolean isNycOrAbove() { return Build.VERSION.SDK_INT >= Build.VERSION_CODES.N; } 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()); 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. Resources res = context.getResources(); int originalSmallestWidth = res.getConfiguration().smallestScreenWidthDp * res.getDisplayMetrics().densityDpi / DisplayMetrics.DENSITY_DEVICE_STABLE; return originalSmallestWidth >= 600; } return false; } 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 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); } /** 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 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; } /** * 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 int calculateTextHeight(float textSizePx) { Paint p = new Paint(); p.setTextSize(textSizePx); Paint.FontMetrics fm = p.getFontMetrics(); return (int) Math.ceil(fm.bottom - fm.top); } /** * 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 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() { return "1".equals(getSystemProperty("sys.boot_completed", "1")); } public static String getSystemProperty(String property, String defaultValue) { try { Class clazz = Class.forName("android.os.SystemProperties"); Method getter = clazz.getDeclaredMethod("get", String.class); String value = (String) getter.invoke(null, property); if (!TextUtils.isEmpty(value)) { return value; } } catch (Exception e) { Log.d(TAG, "Unable to read system properties"); } return defaultValue; } /** * 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; } public static void sendCustomAccessibilityEvent(View target, int type, String text) { AccessibilityManager accessibilityManager = (AccessibilityManager) target.getContext().getSystemService(Context.ACCESSIBILITY_SERVICE); if (accessibilityManager.isEnabled()) { AccessibilityEvent event = AccessibilityEvent.obtain(type); target.onInitializeAccessibilityEvent(event); event.getText().add(text); accessibilityManager.sendAccessibilityEvent(event); } } }