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The Android Open Source Project31dd5032009-03-03 19:32:27 -08001/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
Daniel Sandler325dc232013-06-05 22:57:57 -040017package com.android.launcher3;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080018
Sunny Goyal1ed6c4a2016-04-21 15:16:11 -070019import android.app.WallpaperManager;
Sunny Goyalc5c60ad2014-07-14 12:02:01 -070020import android.content.ComponentName;
Winson Chungaafa03c2010-06-11 17:34:16 -070021import android.content.Context;
Michael Jurkaa805e1a2013-08-22 15:00:33 +020022import android.content.Intent;
Rahul Chaturvedi7fc77ca2015-05-19 18:02:16 -070023import android.content.SharedPreferences;
Sunny Goyalc5c60ad2014-07-14 12:02:01 -070024import android.content.pm.ApplicationInfo;
25import android.content.pm.PackageInfo;
26import android.content.pm.PackageManager;
27import android.content.pm.PackageManager.NameNotFoundException;
28import android.content.pm.ResolveInfo;
Winson Chungaafa03c2010-06-11 17:34:16 -070029import android.content.res.Resources;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080030import android.graphics.Bitmap;
Sunny Goyal95abbb32014-08-04 10:53:22 -070031import android.graphics.Color;
Winson Chungc763c4e2013-07-19 13:49:06 -070032import android.graphics.Matrix;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080033import android.graphics.Paint;
34import android.graphics.Rect;
Sandeep Siddhartha2efc7d92014-05-16 17:21:15 -070035import android.os.Build;
Sunny Goyal4e5cc642015-06-25 16:37:44 -070036import android.os.Bundle;
Sunny Goyal712ee532016-11-04 10:19:58 -070037import android.os.DeadObjectException;
Tony Wickham112ac952015-11-12 12:31:50 -080038import android.os.PowerManager;
Sunny Goyal712ee532016-11-04 10:19:58 -070039import android.os.TransactionTooLargeException;
Sunny Goyal88e5aa12016-12-16 09:15:32 -080040import android.support.v4.os.BuildCompat;
Sunny Goyale78e3d72015-09-24 11:23:31 -070041import android.text.Spannable;
42import android.text.SpannableString;
Sunny Goyal5c97f512015-05-19 16:03:28 -070043import android.text.TextUtils;
Sunny Goyale78e3d72015-09-24 11:23:31 -070044import android.text.style.TtsSpan;
Adam Cohen2e6da152015-05-06 11:42:25 -070045import android.util.DisplayMetrics;
Michael Jurkaa805e1a2013-08-22 15:00:33 +020046import android.util.Log;
Sunny Goyal0fe505b2014-08-06 09:55:36 -070047import android.util.Pair;
Sunny Goyal95abbb32014-08-04 10:53:22 -070048import android.util.SparseArray;
Adam Cohen2e6da152015-05-06 11:42:25 -070049import android.util.TypedValue;
Winson Chungc763c4e2013-07-19 13:49:06 -070050import android.view.View;
Sunny Goyal52851aa2016-09-02 10:41:43 -070051import android.view.accessibility.AccessibilityEvent;
52import android.view.accessibility.AccessibilityManager;
Sunny Goyalb1622cc2015-06-10 16:00:42 -070053
Sunny Goyal713edfc2016-05-06 09:58:34 -070054import com.android.launcher3.config.ProviderConfig;
Sunny Goyal6c56c682015-07-16 14:09:05 -070055
Sunny Goyal5b0e6692015-03-19 14:31:19 -070056import java.io.ByteArrayOutputStream;
Sunny Goyal713edfc2016-05-06 09:58:34 -070057import java.io.Closeable;
Sunny Goyal5b0e6692015-03-19 14:31:19 -070058import java.io.IOException;
Sunny Goyalab121c12016-12-02 19:29:43 +053059import java.lang.reflect.InvocationTargetException;
Sunny Goyal25aba0a2015-07-16 15:07:47 -070060import java.lang.reflect.Method;
Tony Wickham1bce7fd2016-04-28 17:39:03 -070061import java.util.Collection;
Tony Wickham580edcf2017-02-09 08:28:52 -080062import java.util.HashSet;
Sunny Goyalb1622cc2015-06-10 16:00:42 -070063import java.util.Locale;
Sunny Goyal4e5cc642015-06-25 16:37:44 -070064import java.util.Set;
Sunny Goyal8ac727b2015-09-23 15:38:09 -070065import java.util.concurrent.Executor;
66import java.util.concurrent.LinkedBlockingQueue;
67import java.util.concurrent.ThreadPoolExecutor;
68import java.util.concurrent.TimeUnit;
Winson Chung82b016c2015-05-08 17:00:10 -070069import java.util.regex.Matcher;
70import java.util.regex.Pattern;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080071
72/**
73 * Various utilities shared amongst the Launcher's classes.
74 */
Mathew Inwood72fbec12013-11-19 15:45:07 +000075public final class Utilities {
Rahul Chaturvedi7fc77ca2015-05-19 18:02:16 -070076
Joe Onorato1291a8c2009-09-15 15:07:25 -040077 private static final String TAG = "Launcher.Utilities";
78
Winson Chung82b016c2015-05-08 17:00:10 -070079 private static final Pattern sTrimPattern =
80 Pattern.compile("^[\\s|\\p{javaSpaceChar}]*(.*)[\\s|\\p{javaSpaceChar}]*$");
81
Sunny Goyal53d7ee42015-05-22 12:25:45 -070082 private static final int[] sLoc0 = new int[2];
83 private static final int[] sLoc1 = new int[2];
Sunny Goyal5e0e94f2016-10-28 10:01:00 -070084 private static final float[] sPoint = new float[2];
85 private static final Matrix sMatrix = new Matrix();
86 private static final Matrix sInverseMatrix = new Matrix();
Michael Jurka7ad868b2013-12-12 15:04:25 +010087
Sunny Goyaldcc0ba22016-11-02 11:22:39 -070088 public static boolean isAtLeastO() {
Sunny Goyal88e5aa12016-12-16 09:15:32 -080089 return BuildCompat.isAtLeastO();
Sunny Goyaldcc0ba22016-11-02 11:22:39 -070090 }
91
Sunny Goyalf5e37442016-11-02 10:31:24 -070092 public static final boolean ATLEAST_NOUGAT_MR1 =
93 Build.VERSION.SDK_INT >= Build.VERSION_CODES.N_MR1;
Sunny Goyal9994b2b2016-06-23 14:17:24 -070094
Sunny Goyalf5e37442016-11-02 10:31:24 -070095 public static final boolean ATLEAST_NOUGAT =
96 Build.VERSION.SDK_INT >= Build.VERSION_CODES.N;
Sunny Goyale2ec8a32016-09-01 11:00:49 -070097
Winsonbe9798b2016-07-20 12:55:49 -070098 public static final boolean ATLEAST_MARSHMALLOW =
99 Build.VERSION.SDK_INT >= Build.VERSION_CODES.M;
Sunny Goyal9fc953b2015-08-17 12:24:25 -0700100
101 public static final boolean ATLEAST_LOLLIPOP_MR1 =
102 Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1;
103
Sunny Goyal49f19f02017-01-05 14:36:02 -0800104 /**
105 * Indicates if the device has a debug build. Should only be used to store additional info or
106 * add extra logging and not for changing the app behavior.
107 */
108 public static final boolean IS_DEBUG_DEVICE = Build.TYPE.toLowerCase().contains("debug");
109
Sunny Goyal6f866092016-03-17 17:04:15 -0700110 // An intent extra to indicate the horizontal scroll of the wallpaper.
111 public static final String EXTRA_WALLPAPER_OFFSET = "com.android.launcher3.WALLPAPER_OFFSET";
112
Sunny Goyal8ac727b2015-09-23 15:38:09 -0700113 // These values are same as that in {@link AsyncTask}.
114 private static final int CPU_COUNT = Runtime.getRuntime().availableProcessors();
115 private static final int CORE_POOL_SIZE = CPU_COUNT + 1;
116 private static final int MAXIMUM_POOL_SIZE = CPU_COUNT * 2 + 1;
117 private static final int KEEP_ALIVE = 1;
118 /**
119 * An {@link Executor} to be used with async task with no limit on the queue size.
120 */
121 public static final Executor THREAD_POOL_EXECUTOR = new ThreadPoolExecutor(
122 CORE_POOL_SIZE, MAXIMUM_POOL_SIZE, KEEP_ALIVE,
123 TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
124
Rahul Chaturvedi7fc77ca2015-05-19 18:02:16 -0700125 public static final String ALLOW_ROTATION_PREFERENCE_KEY = "pref_allowRotation";
126
Sunny Goyal4bbf4192014-11-11 12:23:59 -0800127 public static boolean isPropertyEnabled(String propertyName) {
Michael Jurka7ad868b2013-12-12 15:04:25 +0100128 return Log.isLoggable(propertyName, Log.VERBOSE);
129 }
130
Sunny Goyal21bf5312015-08-21 11:08:24 -0700131 public static boolean isAllowRotationPrefEnabled(Context context) {
Sunny Goyalf48e5922016-05-12 15:36:20 -0700132 return getPrefs(context).getBoolean(ALLOW_ROTATION_PREFERENCE_KEY,
133 getAllowRotationDefaultValue(context));
134 }
135
136 public static boolean getAllowRotationDefaultValue(Context context) {
Sunny Goyalf5e37442016-11-02 10:31:24 -0700137 if (ATLEAST_NOUGAT) {
Sunny Goyal8f3819b2016-02-23 14:49:22 -0800138 // If the device was scaled, used the original dimensions to determine if rotation
139 // is allowed of not.
Sunny Goyale2ec8a32016-09-01 11:00:49 -0700140 Resources res = context.getResources();
141 int originalSmallestWidth = res.getConfiguration().smallestScreenWidthDp
142 * res.getDisplayMetrics().densityDpi / DisplayMetrics.DENSITY_DEVICE_STABLE;
143 return originalSmallestWidth >= 600;
Sunny Goyal8f3819b2016-02-23 14:49:22 -0800144 }
Sunny Goyalf48e5922016-05-12 15:36:20 -0700145 return false;
Michael Jurka7ad868b2013-12-12 15:04:25 +0100146 }
147
The Android Open Source Project31dd5032009-03-03 19:32:27 -0800148 /**
Winson Chungc763c4e2013-07-19 13:49:06 -0700149 * Given a coordinate relative to the descendant, find the coordinate in a parent view's
150 * coordinates.
151 *
152 * @param descendant The descendant to which the passed coordinate is relative.
Sunny Goyale8b5d202016-06-13 16:36:59 -0700153 * @param ancestor The root view to make the coordinates relative to.
Winson Chungc763c4e2013-07-19 13:49:06 -0700154 * @param coord The coordinate that we want mapped.
155 * @param includeRootScroll Whether or not to account for the scroll of the descendant:
156 * sometimes this is relevant as in a child's coordinates within the descendant.
157 * @return The factor by which this descendant is scaled relative to this DragLayer. Caution
158 * this scale factor is assumed to be equal in X and Y, and so if at any point this
159 * assumption fails, we will need to return a pair of scale factors.
160 */
Sunny Goyale8b5d202016-06-13 16:36:59 -0700161 public static float getDescendantCoordRelativeToAncestor(
162 View descendant, View ancestor, int[] coord, boolean includeRootScroll) {
Sunny Goyal5e0e94f2016-10-28 10:01:00 -0700163 sPoint[0] = coord[0];
164 sPoint[1] = coord[1];
165
Sunny Goyal8cf47a52016-06-15 10:11:30 -0700166 float scale = 1.0f;
Winson Chungc763c4e2013-07-19 13:49:06 -0700167 View v = descendant;
Sunny Goyale8b5d202016-06-13 16:36:59 -0700168 while(v != ancestor && v != null) {
Sunny Goyal8cf47a52016-06-15 10:11:30 -0700169 // For TextViews, scroll has a meaning which relates to the text position
170 // which is very strange... ignore the scroll.
171 if (v != descendant || includeRootScroll) {
Sunny Goyal5e0e94f2016-10-28 10:01:00 -0700172 sPoint[0] -= v.getScrollX();
173 sPoint[1] -= v.getScrollY();
Sunny Goyal8cf47a52016-06-15 10:11:30 -0700174 }
175
Sunny Goyal5e0e94f2016-10-28 10:01:00 -0700176 v.getMatrix().mapPoints(sPoint);
177 sPoint[0] += v.getLeft();
178 sPoint[1] += v.getTop();
Sunny Goyal8cf47a52016-06-15 10:11:30 -0700179 scale *= v.getScaleX();
180
Winson Chungc763c4e2013-07-19 13:49:06 -0700181 v = (View) v.getParent();
182 }
Winson Chungc763c4e2013-07-19 13:49:06 -0700183
Sunny Goyal5e0e94f2016-10-28 10:01:00 -0700184 coord[0] = Math.round(sPoint[0]);
185 coord[1] = Math.round(sPoint[1]);
Winson Chungc763c4e2013-07-19 13:49:06 -0700186 return scale;
187 }
188
189 /**
Sunny Goyale8b5d202016-06-13 16:36:59 -0700190 * Inverse of {@link #getDescendantCoordRelativeToAncestor(View, View, int[], boolean)}.
Winson Chungc763c4e2013-07-19 13:49:06 -0700191 */
Sunny Goyal5e0e94f2016-10-28 10:01:00 -0700192 public static void mapCoordInSelfToDescendant(View descendant, View root, int[] coord) {
193 sMatrix.reset();
Winson Chungc763c4e2013-07-19 13:49:06 -0700194 View v = descendant;
195 while(v != root) {
Sunny Goyal5e0e94f2016-10-28 10:01:00 -0700196 sMatrix.postTranslate(-v.getScrollX(), -v.getScrollY());
197 sMatrix.postConcat(v.getMatrix());
198 sMatrix.postTranslate(v.getLeft(), v.getTop());
Winson Chungc763c4e2013-07-19 13:49:06 -0700199 v = (View) v.getParent();
200 }
Sunny Goyal5e0e94f2016-10-28 10:01:00 -0700201 sMatrix.postTranslate(-v.getScrollX(), -v.getScrollY());
202 sMatrix.invert(sInverseMatrix);
Winson Chungc763c4e2013-07-19 13:49:06 -0700203
Sunny Goyal5e0e94f2016-10-28 10:01:00 -0700204 sPoint[0] = coord[0];
205 sPoint[1] = coord[1];
206 sInverseMatrix.mapPoints(sPoint);
207 coord[0] = Math.round(sPoint[0]);
208 coord[1] = Math.round(sPoint[1]);
Winson Chungc763c4e2013-07-19 13:49:06 -0700209 }
210
Jason Monk02dd7ae2014-04-15 15:23:31 -0400211 /**
212 * Utility method to determine whether the given point, in local coordinates,
213 * is inside the view, where the area of the view is expanded by the slop factor.
214 * This method is called while processing touch-move events to determine if the event
215 * is still within the view.
216 */
217 public static boolean pointInView(View v, float localX, float localY, float slop) {
218 return localX >= -slop && localY >= -slop && localX < (v.getWidth() + slop) &&
219 localY < (v.getHeight() + slop);
220 }
221
Sunny Goyala52ecb02016-12-16 15:04:51 -0800222 public static int[] getCenterDeltaInScreenSpace(View v0, View v1) {
Adam Cohen63f1ec02014-08-12 09:23:13 -0700223 v0.getLocationInWindow(sLoc0);
224 v1.getLocationInWindow(sLoc1);
225
226 sLoc0[0] += (v0.getMeasuredWidth() * v0.getScaleX()) / 2;
227 sLoc0[1] += (v0.getMeasuredHeight() * v0.getScaleY()) / 2;
228 sLoc1[0] += (v1.getMeasuredWidth() * v1.getScaleX()) / 2;
229 sLoc1[1] += (v1.getMeasuredHeight() * v1.getScaleY()) / 2;
Sunny Goyala52ecb02016-12-16 15:04:51 -0800230 return new int[] {sLoc1[0] - sLoc0[0], sLoc1[1] - sLoc0[1]};
Adam Cohen63f1ec02014-08-12 09:23:13 -0700231 }
232
Jon Miranda6f6a06a2016-12-15 11:24:18 -0800233 public static void scaleRectAboutCenter(Rect r, float scale) {
234 if (scale != 1.0f) {
235 int cx = r.centerX();
236 int cy = r.centerY();
237 r.offset(-cx, -cy);
238
239 r.left = (int) (r.left * scale + 0.5f);
240 r.top = (int) (r.top * scale + 0.5f);
241 r.right = (int) (r.right * scale + 0.5f);
242 r.bottom = (int) (r.bottom * scale + 0.5f);
243
244 r.offset(cx, cy);
245 }
246 }
247
248 public static float shrinkRect(Rect r, float scaleX, float scaleY) {
Jon Mirandae96798e2016-12-07 12:10:44 -0800249 float scale = Math.min(Math.min(scaleX, scaleY), 1.0f);
250 if (scale < 1.0f) {
251 int deltaX = (int) (r.width() * (scaleX - scale) * 0.5f);
252 r.left += deltaX;
253 r.right -= deltaX;
Sunny Goyal106bf642015-07-16 12:18:06 -0700254
Jon Mirandae96798e2016-12-07 12:10:44 -0800255 int deltaY = (int) (r.height() * (scaleY - scale) * 0.5f);
256 r.top += deltaY;
257 r.bottom -= deltaY;
Sunny Goyal106bf642015-07-16 12:18:06 -0700258 }
Jon Mirandae96798e2016-12-07 12:10:44 -0800259 return scale;
Winson Chung3a6e7f32013-10-09 15:50:52 -0700260 }
261
Sunny Goyalc5c60ad2014-07-14 12:02:01 -0700262 static boolean isSystemApp(Context context, Intent intent) {
263 PackageManager pm = context.getPackageManager();
264 ComponentName cn = intent.getComponent();
265 String packageName = null;
266 if (cn == null) {
267 ResolveInfo info = pm.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
268 if ((info != null) && (info.activityInfo != null)) {
269 packageName = info.activityInfo.packageName;
270 }
271 } else {
272 packageName = cn.getPackageName();
273 }
274 if (packageName != null) {
275 try {
276 PackageInfo info = pm.getPackageInfo(packageName, 0);
277 return (info != null) && (info.applicationInfo != null) &&
278 ((info.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0);
279 } catch (NameNotFoundException e) {
280 return false;
281 }
282 } else {
283 return false;
284 }
285 }
Sunny Goyal95abbb32014-08-04 10:53:22 -0700286
287 /**
288 * This picks a dominant color, looking for high-saturation, high-value, repeated hues.
289 * @param bitmap The bitmap to scan
290 * @param samples The approximate max number of samples to use.
291 */
Tony Wickham9a8d11f2017-01-11 09:53:12 -0800292 public static int findDominantColorByHue(Bitmap bitmap, int samples) {
Sunny Goyal95abbb32014-08-04 10:53:22 -0700293 final int height = bitmap.getHeight();
294 final int width = bitmap.getWidth();
295 int sampleStride = (int) Math.sqrt((height * width) / samples);
296 if (sampleStride < 1) {
297 sampleStride = 1;
298 }
299
300 // This is an out-param, for getting the hsv values for an rgb
301 float[] hsv = new float[3];
302
303 // First get the best hue, by creating a histogram over 360 hue buckets,
304 // where each pixel contributes a score weighted by saturation, value, and alpha.
305 float[] hueScoreHistogram = new float[360];
306 float highScore = -1;
307 int bestHue = -1;
308
309 for (int y = 0; y < height; y += sampleStride) {
310 for (int x = 0; x < width; x += sampleStride) {
311 int argb = bitmap.getPixel(x, y);
312 int alpha = 0xFF & (argb >> 24);
313 if (alpha < 0x80) {
314 // Drop mostly-transparent pixels.
315 continue;
316 }
317 // Remove the alpha channel.
318 int rgb = argb | 0xFF000000;
319 Color.colorToHSV(rgb, hsv);
320 // Bucket colors by the 360 integer hues.
321 int hue = (int) hsv[0];
322 if (hue < 0 || hue >= hueScoreHistogram.length) {
323 // Defensively avoid array bounds violations.
324 continue;
325 }
326 float score = hsv[1] * hsv[2];
327 hueScoreHistogram[hue] += score;
328 if (hueScoreHistogram[hue] > highScore) {
329 highScore = hueScoreHistogram[hue];
330 bestHue = hue;
331 }
332 }
333 }
334
335 SparseArray<Float> rgbScores = new SparseArray<Float>();
336 int bestColor = 0xff000000;
337 highScore = -1;
338 // Go back over the RGB colors that match the winning hue,
339 // creating a histogram of weighted s*v scores, for up to 100*100 [s,v] buckets.
340 // The highest-scoring RGB color wins.
341 for (int y = 0; y < height; y += sampleStride) {
342 for (int x = 0; x < width; x += sampleStride) {
343 int rgb = bitmap.getPixel(x, y) | 0xff000000;
344 Color.colorToHSV(rgb, hsv);
345 int hue = (int) hsv[0];
346 if (hue == bestHue) {
347 float s = hsv[1];
348 float v = hsv[2];
349 int bucket = (int) (s * 100) + (int) (v * 10000);
350 // Score by cumulative saturation * value.
351 float score = s * v;
352 Float oldTotal = rgbScores.get(bucket);
353 float newTotal = oldTotal == null ? score : oldTotal + score;
354 rgbScores.put(bucket, newTotal);
355 if (newTotal > highScore) {
356 highScore = newTotal;
357 // All the colors in the winning bucket are very similar. Last in wins.
358 bestColor = rgb;
359 }
360 }
361 }
362 }
363 return bestColor;
364 }
Sunny Goyal0fe505b2014-08-06 09:55:36 -0700365
366 /*
367 * Finds a system apk which had a broadcast receiver listening to a particular action.
368 * @param action intent action used to find the apk
369 * @return a pair of apk package name and the resources.
370 */
371 static Pair<String, Resources> findSystemApk(String action, PackageManager pm) {
372 final Intent intent = new Intent(action);
373 for (ResolveInfo info : pm.queryBroadcastReceivers(intent, 0)) {
374 if (info.activityInfo != null &&
375 (info.activityInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
376 final String packageName = info.activityInfo.packageName;
377 try {
378 final Resources res = pm.getResourcesForApplication(packageName);
379 return Pair.create(packageName, res);
380 } catch (NameNotFoundException e) {
381 Log.w(TAG, "Failed to find resources for " + packageName);
382 }
383 }
384 }
385 return null;
386 }
Sunny Goyalfafca522014-11-03 11:30:01 -0800387
Sunny Goyal594d76d2014-11-06 10:12:54 -0800388 /**
Sunny Goyal5b0e6692015-03-19 14:31:19 -0700389 * Compresses the bitmap to a byte array for serialization.
390 */
391 public static byte[] flattenBitmap(Bitmap bitmap) {
392 // Try go guesstimate how much space the icon will take when serialized
393 // to avoid unnecessary allocations/copies during the write.
394 int size = bitmap.getWidth() * bitmap.getHeight() * 4;
395 ByteArrayOutputStream out = new ByteArrayOutputStream(size);
396 try {
397 bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
398 out.flush();
399 out.close();
400 return out.toByteArray();
401 } catch (IOException e) {
402 Log.w(TAG, "Could not write bitmap");
403 return null;
404 }
405 }
406
Sunny Goyalf7a29e82015-04-24 15:20:43 -0700407 /**
Winson Chung82b016c2015-05-08 17:00:10 -0700408 * Trims the string, removing all whitespace at the beginning and end of the string.
409 * Non-breaking whitespaces are also removed.
410 */
411 public static String trim(CharSequence s) {
Winson Chungafa77e92015-05-15 12:04:03 -0700412 if (s == null) {
413 return null;
414 }
415
Winson Chung82b016c2015-05-08 17:00:10 -0700416 // Just strip any sequence of whitespace or java space characters from the beginning and end
417 Matcher m = sTrimPattern.matcher(s);
418 return m.replaceAll("$1");
419 }
Sunny Goyal70660032015-05-14 00:07:08 -0700420
Winson Chung2c6e5cc2015-06-01 14:38:24 -0700421 /**
422 * Calculates the height of a given string at a specific text size.
423 */
Sunny Goyalbaec6ff2016-09-14 11:26:21 -0700424 public static int calculateTextHeight(float textSizePx) {
Winson Chung2c6e5cc2015-06-01 14:38:24 -0700425 Paint p = new Paint();
426 p.setTextSize(textSizePx);
427 Paint.FontMetrics fm = p.getFontMetrics();
Sunny Goyalbaec6ff2016-09-14 11:26:21 -0700428 return (int) Math.ceil(fm.bottom - fm.top);
Winson Chung2c6e5cc2015-06-01 14:38:24 -0700429 }
430
Winson Chungb1777442015-06-16 13:35:04 -0700431 /**
432 * Convenience println with multiple args.
433 */
434 public static void println(String key, Object... args) {
435 StringBuilder b = new StringBuilder();
436 b.append(key);
437 b.append(": ");
438 boolean isFirstArgument = true;
439 for (Object arg : args) {
440 if (isFirstArgument) {
441 isFirstArgument = false;
442 } else {
443 b.append(", ");
444 }
445 b.append(arg);
446 }
447 System.out.println(b.toString());
448 }
449
Sunny Goyal70660032015-05-14 00:07:08 -0700450 public static boolean isRtl(Resources res) {
Sunny Goyala52ecb02016-12-16 15:04:51 -0800451 return res.getConfiguration().getLayoutDirection() == View.LAYOUT_DIRECTION_RTL;
Sunny Goyal70660032015-05-14 00:07:08 -0700452 }
Hyunyoung Song2bd3d7d2015-05-21 13:04:53 -0700453
Sunny Goyal5c97f512015-05-19 16:03:28 -0700454 /**
455 * Returns true if the intent is a valid launch intent for a launcher activity of an app.
456 * This is used to identify shortcuts which are different from the ones exposed by the
457 * applications' manifest file.
458 *
459 * @param launchIntent The intent that will be launched when the shortcut is clicked.
460 */
461 public static boolean isLauncherAppTarget(Intent launchIntent) {
Sunny Goyal4e5cc642015-06-25 16:37:44 -0700462 if (launchIntent != null
Sunny Goyal5c97f512015-05-19 16:03:28 -0700463 && Intent.ACTION_MAIN.equals(launchIntent.getAction())
464 && launchIntent.getComponent() != null
465 && launchIntent.getCategories() != null
466 && launchIntent.getCategories().size() == 1
467 && launchIntent.hasCategory(Intent.CATEGORY_LAUNCHER)
Sunny Goyal4e5cc642015-06-25 16:37:44 -0700468 && TextUtils.isEmpty(launchIntent.getDataString())) {
469 // An app target can either have no extra or have ItemInfo.EXTRA_PROFILE.
470 Bundle extras = launchIntent.getExtras();
Sunny Goyal24bb66a2017-03-21 15:12:01 -0700471 return extras == null || extras.keySet().isEmpty();
472 }
Sunny Goyal4e5cc642015-06-25 16:37:44 -0700473 return false;
Sunny Goyal5c97f512015-05-19 16:03:28 -0700474 }
Adam Cohen2e6da152015-05-06 11:42:25 -0700475
476 public static float dpiFromPx(int size, DisplayMetrics metrics){
477 float densityRatio = (float) metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT;
478 return (size / densityRatio);
479 }
480 public static int pxFromDp(float size, DisplayMetrics metrics) {
481 return (int) Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
482 size, metrics));
483 }
484 public static int pxFromSp(float size, DisplayMetrics metrics) {
485 return (int) Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,
486 size, metrics));
487 }
Sunny Goyalb1622cc2015-06-10 16:00:42 -0700488
489 public static String createDbSelectionQuery(String columnName, Iterable<?> values) {
490 return String.format(Locale.ENGLISH, "%s IN (%s)", columnName, TextUtils.join(", ", values));
491 }
Sunny Goyal25aba0a2015-07-16 15:07:47 -0700492
Sunny Goyal25aba0a2015-07-16 15:07:47 -0700493 public static boolean isBootCompleted() {
Sunny Goyaldfc8b662016-08-30 12:05:48 -0700494 return "1".equals(getSystemProperty("sys.boot_completed", "1"));
495 }
496
497 public static String getSystemProperty(String property, String defaultValue) {
Sunny Goyal25aba0a2015-07-16 15:07:47 -0700498 try {
499 Class clazz = Class.forName("android.os.SystemProperties");
500 Method getter = clazz.getDeclaredMethod("get", String.class);
Sunny Goyaldfc8b662016-08-30 12:05:48 -0700501 String value = (String) getter.invoke(null, property);
502 if (!TextUtils.isEmpty(value)) {
503 return value;
504 }
Sunny Goyal25aba0a2015-07-16 15:07:47 -0700505 } catch (Exception e) {
506 Log.d(TAG, "Unable to read system properties");
Sunny Goyal25aba0a2015-07-16 15:07:47 -0700507 }
Sunny Goyaldfc8b662016-08-30 12:05:48 -0700508 return defaultValue;
Sunny Goyal25aba0a2015-07-16 15:07:47 -0700509 }
Tony Wickham29d853c2015-09-08 10:35:56 -0700510
511 /**
512 * Ensures that a value is within given bounds. Specifically:
513 * If value is less than lowerBound, return lowerBound; else if value is greater than upperBound,
514 * return upperBound; else return value unchanged.
515 */
Tony Wickhamf549dab2016-05-16 09:54:06 -0700516 public static int boundToRange(int value, int lowerBound, int upperBound) {
517 return Math.max(lowerBound, Math.min(value, upperBound));
518 }
519
520 /**
521 * @see #boundToRange(int, int, int).
522 */
523 public static float boundToRange(float value, float lowerBound, float upperBound) {
Tony Wickham29d853c2015-09-08 10:35:56 -0700524 return Math.max(lowerBound, Math.min(value, upperBound));
525 }
Sunny Goyal9d438082015-09-25 11:50:16 -0700526
Sunny Goyale78e3d72015-09-24 11:23:31 -0700527 /**
528 * Wraps a message with a TTS span, so that a different message is spoken than
529 * what is getting displayed.
530 * @param msg original message
531 * @param ttsMsg message to be spoken
532 */
Sunny Goyale78e3d72015-09-24 11:23:31 -0700533 public static CharSequence wrapForTts(CharSequence msg, String ttsMsg) {
Sunny Goyala52ecb02016-12-16 15:04:51 -0800534 SpannableString spanned = new SpannableString(msg);
535 spanned.setSpan(new TtsSpan.TextBuilder(ttsMsg).build(),
536 0, spanned.length(), Spannable.SPAN_INCLUSIVE_INCLUSIVE);
537 return spanned;
Sunny Goyale78e3d72015-09-24 11:23:31 -0700538 }
Winson12fb9fc2015-10-01 15:34:08 -0700539
540 /**
541 * Replacement for Long.compare() which was added in API level 19.
542 */
543 public static int longCompare(long lhs, long rhs) {
544 return lhs < rhs ? -1 : (lhs == rhs ? 0 : 1);
545 }
Sunny Goyalf7258242015-10-19 16:59:07 -0700546
547 public static SharedPreferences getPrefs(Context context) {
548 return context.getSharedPreferences(
549 LauncherFiles.SHARED_PREFERENCES_KEY, Context.MODE_PRIVATE);
550 }
Tony Wickham112ac952015-11-12 12:31:50 -0800551
Tony Wickham112ac952015-11-12 12:31:50 -0800552 public static boolean isPowerSaverOn(Context context) {
553 PowerManager powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
Sunny Goyala52ecb02016-12-16 15:04:51 -0800554 return powerManager.isPowerSaveMode();
Tony Wickham112ac952015-11-12 12:31:50 -0800555 }
Sunny Goyale1483fb2016-01-08 12:16:15 -0800556
Hyunyoung Song0de01172016-10-05 16:27:48 -0700557 public static boolean isWallpaperAllowed(Context context) {
Sunny Goyalf5e37442016-11-02 10:31:24 -0700558 if (ATLEAST_NOUGAT) {
Sunny Goyal1ed6c4a2016-04-21 15:16:11 -0700559 try {
560 WallpaperManager wm = context.getSystemService(WallpaperManager.class);
Kenny Guy367da9f2016-05-25 19:22:14 +0100561 return (Boolean) wm.getClass().getDeclaredMethod("isSetWallpaperAllowed")
Sunny Goyal1ed6c4a2016-04-21 15:16:11 -0700562 .invoke(wm);
563 } catch (Exception e) { }
564 }
565 return true;
566 }
567
Sunny Goyal713edfc2016-05-06 09:58:34 -0700568 public static void closeSilently(Closeable c) {
569 if (c != null) {
570 try {
571 c.close();
572 } catch (IOException e) {
573 if (ProviderConfig.IS_DOGFOOD_BUILD) {
574 Log.d(TAG, "Error closing", e);
575 }
576 }
577 }
578 }
579
Sunny Goyale1483fb2016-01-08 12:16:15 -0800580 /**
Sunny Goyal3f732192016-05-13 13:48:44 -0700581 * Returns true if {@param original} contains all entries defined in {@param updates} and
582 * have the same value.
583 * The comparison uses {@link Object#equals(Object)} to compare the values.
584 */
585 public static boolean containsAll(Bundle original, Bundle updates) {
586 for (String key : updates.keySet()) {
587 Object value1 = updates.get(key);
588 Object value2 = original.get(key);
589 if (value1 == null) {
590 if (value2 != null) {
591 return false;
592 }
593 } else if (!value1.equals(value2)) {
594 return false;
595 }
596 }
597 return true;
598 }
599
Tony Wickham1bce7fd2016-04-28 17:39:03 -0700600 /** Returns whether the collection is null or empty. */
601 public static boolean isEmpty(Collection c) {
602 return c == null || c.isEmpty();
603 }
604
Sunny Goyal52851aa2016-09-02 10:41:43 -0700605 public static void sendCustomAccessibilityEvent(View target, int type, String text) {
606 AccessibilityManager accessibilityManager = (AccessibilityManager)
607 target.getContext().getSystemService(Context.ACCESSIBILITY_SERVICE);
608 if (accessibilityManager.isEnabled()) {
609 AccessibilityEvent event = AccessibilityEvent.obtain(type);
610 target.onInitializeAccessibilityEvent(event);
611 event.getText().add(text);
612 accessibilityManager.sendAccessibilityEvent(event);
613 }
614 }
Sunny Goyal712ee532016-11-04 10:19:58 -0700615
616 public static boolean isBinderSizeError(Exception e) {
617 return e.getCause() instanceof TransactionTooLargeException
618 || e.getCause() instanceof DeadObjectException;
619 }
Sunny Goyalab121c12016-12-02 19:29:43 +0530620
621 public static <T> T getOverrideObject(Class<T> clazz, Context context, int resId) {
622 String className = context.getString(resId);
623 if (!TextUtils.isEmpty(className)) {
624 try {
625 Class<?> cls = Class.forName(className);
626 return (T) cls.getDeclaredConstructor(Context.class).newInstance(context);
627 } catch (ClassNotFoundException | InstantiationException | IllegalAccessException
628 | ClassCastException | NoSuchMethodException | InvocationTargetException e) {
629 Log.e(TAG, "Bad overriden class", e);
630 }
631 }
632
633 try {
634 return clazz.newInstance();
635 } catch (InstantiationException|IllegalAccessException e) {
636 throw new RuntimeException(e);
637 }
638 }
Tony Wickham580edcf2017-02-09 08:28:52 -0800639
640 /**
641 * Returns a HashSet with a single element. We use this instead of Collections.singleton()
642 * because HashSet ensures all operations, such as remove, are supported.
643 */
644 public static <T> HashSet<T> singletonHashSet(T elem) {
645 HashSet<T> hashSet = new HashSet<>(1);
646 hashSet.add(elem);
647 return hashSet;
648 }
The Android Open Source Project31dd5032009-03-03 19:32:27 -0800649}