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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 Goyalfafca522014-11-03 11:30:01 -080019import android.annotation.TargetApi;
Michael Jurkaa805e1a2013-08-22 15:00:33 +020020import android.app.Activity;
Sunny Goyal1ed6c4a2016-04-21 15:16:11 -070021import android.app.WallpaperManager;
Michael Jurkaa805e1a2013-08-22 15:00:33 +020022import android.content.ActivityNotFoundException;
Sunny Goyalc5c60ad2014-07-14 12:02:01 -070023import android.content.ComponentName;
Winson Chungaafa03c2010-06-11 17:34:16 -070024import android.content.Context;
Michael Jurkaa805e1a2013-08-22 15:00:33 +020025import android.content.Intent;
Rahul Chaturvedi7fc77ca2015-05-19 18:02:16 -070026import android.content.SharedPreferences;
Sunny Goyalc5c60ad2014-07-14 12:02:01 -070027import android.content.pm.ApplicationInfo;
28import android.content.pm.PackageInfo;
29import android.content.pm.PackageManager;
30import android.content.pm.PackageManager.NameNotFoundException;
31import android.content.pm.ResolveInfo;
Winson Chungaafa03c2010-06-11 17:34:16 -070032import android.content.res.Resources;
Andrew Sappersteinabef55a2016-06-19 12:49:00 -070033import android.content.res.TypedArray;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080034import android.graphics.Bitmap;
Sunny Goyal95abbb32014-08-04 10:53:22 -070035import android.graphics.Color;
Winson Chungc763c4e2013-07-19 13:49:06 -070036import android.graphics.Matrix;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080037import android.graphics.Paint;
38import android.graphics.Rect;
Sandeep Siddhartha2efc7d92014-05-16 17:21:15 -070039import android.os.Build;
Sunny Goyal4e5cc642015-06-25 16:37:44 -070040import android.os.Bundle;
Tony Wickham112ac952015-11-12 12:31:50 -080041import android.os.PowerManager;
Sunny Goyale78e3d72015-09-24 11:23:31 -070042import android.text.Spannable;
43import android.text.SpannableString;
Sunny Goyal5c97f512015-05-19 16:03:28 -070044import android.text.TextUtils;
Sunny Goyale78e3d72015-09-24 11:23:31 -070045import android.text.style.TtsSpan;
Adam Cohen2e6da152015-05-06 11:42:25 -070046import android.util.DisplayMetrics;
Michael Jurkaa805e1a2013-08-22 15:00:33 +020047import android.util.Log;
Sunny Goyal0fe505b2014-08-06 09:55:36 -070048import android.util.Pair;
Sunny Goyal95abbb32014-08-04 10:53:22 -070049import android.util.SparseArray;
Adam Cohen2e6da152015-05-06 11:42:25 -070050import android.util.TypedValue;
Tony Wickham1bce7fd2016-04-28 17:39:03 -070051import android.view.MotionEvent;
Winson Chungc763c4e2013-07-19 13:49:06 -070052import android.view.View;
Sunny Goyal52851aa2016-09-02 10:41:43 -070053import android.view.accessibility.AccessibilityEvent;
54import android.view.accessibility.AccessibilityManager;
Michael Jurkaa805e1a2013-08-22 15:00:33 +020055import android.widget.Toast;
Sunny Goyalb1622cc2015-06-10 16:00:42 -070056
Sunny Goyal713edfc2016-05-06 09:58:34 -070057import com.android.launcher3.config.ProviderConfig;
Sunny Goyal6c56c682015-07-16 14:09:05 -070058
Sunny Goyal5b0e6692015-03-19 14:31:19 -070059import java.io.ByteArrayOutputStream;
Sunny Goyal713edfc2016-05-06 09:58:34 -070060import java.io.Closeable;
Sunny Goyal5b0e6692015-03-19 14:31:19 -070061import java.io.IOException;
Sunny Goyal25aba0a2015-07-16 15:07:47 -070062import java.lang.reflect.Method;
Winson Chungc763c4e2013-07-19 13:49:06 -070063import java.util.ArrayList;
Tony Wickham1bce7fd2016-04-28 17:39:03 -070064import java.util.Collection;
Sunny Goyalb1622cc2015-06-10 16:00:42 -070065import java.util.Locale;
Sunny Goyal4e5cc642015-06-25 16:37:44 -070066import java.util.Set;
Sunny Goyal8ac727b2015-09-23 15:38:09 -070067import java.util.concurrent.Executor;
68import java.util.concurrent.LinkedBlockingQueue;
69import java.util.concurrent.ThreadPoolExecutor;
70import java.util.concurrent.TimeUnit;
Winson Chung82b016c2015-05-08 17:00:10 -070071import java.util.regex.Matcher;
72import java.util.regex.Pattern;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080073
74/**
75 * Various utilities shared amongst the Launcher's classes.
76 */
Mathew Inwood72fbec12013-11-19 15:45:07 +000077public final class Utilities {
Rahul Chaturvedi7fc77ca2015-05-19 18:02:16 -070078
Joe Onorato1291a8c2009-09-15 15:07:25 -040079 private static final String TAG = "Launcher.Utilities";
80
Winson Chung82b016c2015-05-08 17:00:10 -070081 private static final Pattern sTrimPattern =
82 Pattern.compile("^[\\s|\\p{javaSpaceChar}]*(.*)[\\s|\\p{javaSpaceChar}]*$");
83
Sunny Goyal53d7ee42015-05-22 12:25:45 -070084 private static final int[] sLoc0 = new int[2];
85 private static final int[] sLoc1 = new int[2];
Michael Jurka7ad868b2013-12-12 15:04:25 +010086
Sunny Goyalf5e37442016-11-02 10:31:24 -070087 public static final boolean ATLEAST_NOUGAT_MR1 =
88 Build.VERSION.SDK_INT >= Build.VERSION_CODES.N_MR1;
Sunny Goyal9994b2b2016-06-23 14:17:24 -070089
Sunny Goyalf5e37442016-11-02 10:31:24 -070090 public static final boolean ATLEAST_NOUGAT =
91 Build.VERSION.SDK_INT >= Build.VERSION_CODES.N;
Sunny Goyale2ec8a32016-09-01 11:00:49 -070092
Winsonbe9798b2016-07-20 12:55:49 -070093 public static final boolean ATLEAST_MARSHMALLOW =
94 Build.VERSION.SDK_INT >= Build.VERSION_CODES.M;
Sunny Goyal9fc953b2015-08-17 12:24:25 -070095
96 public static final boolean ATLEAST_LOLLIPOP_MR1 =
97 Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1;
98
99 public static final boolean ATLEAST_LOLLIPOP =
100 Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP;
101
102 public static final boolean ATLEAST_KITKAT =
103 Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
104
105 public static final boolean ATLEAST_JB_MR1 =
106 Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1;
107
108 public static final boolean ATLEAST_JB_MR2 =
109 Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2;
110
Sunny Goyal6f866092016-03-17 17:04:15 -0700111 // An intent extra to indicate the horizontal scroll of the wallpaper.
112 public static final String EXTRA_WALLPAPER_OFFSET = "com.android.launcher3.WALLPAPER_OFFSET";
113
Sunny Goyal8ac727b2015-09-23 15:38:09 -0700114 // These values are same as that in {@link AsyncTask}.
115 private static final int CPU_COUNT = Runtime.getRuntime().availableProcessors();
116 private static final int CORE_POOL_SIZE = CPU_COUNT + 1;
117 private static final int MAXIMUM_POOL_SIZE = CPU_COUNT * 2 + 1;
118 private static final int KEEP_ALIVE = 1;
119 /**
120 * An {@link Executor} to be used with async task with no limit on the queue size.
121 */
122 public static final Executor THREAD_POOL_EXECUTOR = new ThreadPoolExecutor(
123 CORE_POOL_SIZE, MAXIMUM_POOL_SIZE, KEEP_ALIVE,
124 TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
125
Rahul Chaturvedi7fc77ca2015-05-19 18:02:16 -0700126 public static final String ALLOW_ROTATION_PREFERENCE_KEY = "pref_allowRotation";
127
Sunny Goyal4bbf4192014-11-11 12:23:59 -0800128 public static boolean isPropertyEnabled(String propertyName) {
Michael Jurka7ad868b2013-12-12 15:04:25 +0100129 return Log.isLoggable(propertyName, Log.VERBOSE);
130 }
131
Sunny Goyal21bf5312015-08-21 11:08:24 -0700132 public static boolean isAllowRotationPrefEnabled(Context context) {
Sunny Goyalf48e5922016-05-12 15:36:20 -0700133 return getPrefs(context).getBoolean(ALLOW_ROTATION_PREFERENCE_KEY,
134 getAllowRotationDefaultValue(context));
135 }
136
137 public static boolean getAllowRotationDefaultValue(Context context) {
Sunny Goyalf5e37442016-11-02 10:31:24 -0700138 if (ATLEAST_NOUGAT) {
Sunny Goyal8f3819b2016-02-23 14:49:22 -0800139 // If the device was scaled, used the original dimensions to determine if rotation
140 // is allowed of not.
Sunny Goyale2ec8a32016-09-01 11:00:49 -0700141 Resources res = context.getResources();
142 int originalSmallestWidth = res.getConfiguration().smallestScreenWidthDp
143 * res.getDisplayMetrics().densityDpi / DisplayMetrics.DENSITY_DEVICE_STABLE;
144 return originalSmallestWidth >= 600;
Sunny Goyal8f3819b2016-02-23 14:49:22 -0800145 }
Sunny Goyalf48e5922016-05-12 15:36:20 -0700146 return false;
Michael Jurka7ad868b2013-12-12 15:04:25 +0100147 }
148
The Android Open Source Project31dd5032009-03-03 19:32:27 -0800149 /**
Winson Chungc763c4e2013-07-19 13:49:06 -0700150 * Given a coordinate relative to the descendant, find the coordinate in a parent view's
151 * coordinates.
152 *
153 * @param descendant The descendant to which the passed coordinate is relative.
Sunny Goyale8b5d202016-06-13 16:36:59 -0700154 * @param ancestor The root view to make the coordinates relative to.
Winson Chungc763c4e2013-07-19 13:49:06 -0700155 * @param coord The coordinate that we want mapped.
156 * @param includeRootScroll Whether or not to account for the scroll of the descendant:
157 * sometimes this is relevant as in a child's coordinates within the descendant.
158 * @return The factor by which this descendant is scaled relative to this DragLayer. Caution
159 * this scale factor is assumed to be equal in X and Y, and so if at any point this
160 * assumption fails, we will need to return a pair of scale factors.
161 */
Sunny Goyale8b5d202016-06-13 16:36:59 -0700162 public static float getDescendantCoordRelativeToAncestor(
163 View descendant, View ancestor, int[] coord, boolean includeRootScroll) {
Winson Chungc763c4e2013-07-19 13:49:06 -0700164 float[] pt = {coord[0], coord[1]};
Sunny Goyal8cf47a52016-06-15 10:11:30 -0700165 float scale = 1.0f;
Winson Chungc763c4e2013-07-19 13:49:06 -0700166 View v = descendant;
Sunny Goyale8b5d202016-06-13 16:36:59 -0700167 while(v != ancestor && v != null) {
Sunny Goyal8cf47a52016-06-15 10:11:30 -0700168 // For TextViews, scroll has a meaning which relates to the text position
169 // which is very strange... ignore the scroll.
170 if (v != descendant || includeRootScroll) {
171 pt[0] -= v.getScrollX();
172 pt[1] -= v.getScrollY();
173 }
174
175 v.getMatrix().mapPoints(pt);
176 pt[0] += v.getLeft();
177 pt[1] += v.getTop();
178 scale *= v.getScaleX();
179
Winson Chungc763c4e2013-07-19 13:49:06 -0700180 v = (View) v.getParent();
181 }
Winson Chungc763c4e2013-07-19 13:49:06 -0700182
Sunny Goyal8cf47a52016-06-15 10:11:30 -0700183 coord[0] = Math.round(pt[0]);
184 coord[1] = Math.round(pt[1]);
Winson Chungc763c4e2013-07-19 13:49:06 -0700185 return scale;
186 }
187
188 /**
Sunny Goyale8b5d202016-06-13 16:36:59 -0700189 * Inverse of {@link #getDescendantCoordRelativeToAncestor(View, View, int[], boolean)}.
Winson Chungc763c4e2013-07-19 13:49:06 -0700190 */
191 public static float mapCoordInSelfToDescendent(View descendant, View root,
192 int[] coord) {
193 ArrayList<View> ancestorChain = new ArrayList<View>();
194
195 float[] pt = {coord[0], coord[1]};
196
197 View v = descendant;
198 while(v != root) {
199 ancestorChain.add(v);
200 v = (View) v.getParent();
201 }
202 ancestorChain.add(root);
203
204 float scale = 1.0f;
205 Matrix inverse = new Matrix();
206 int count = ancestorChain.size();
207 for (int i = count - 1; i >= 0; i--) {
208 View ancestor = ancestorChain.get(i);
209 View next = i > 0 ? ancestorChain.get(i-1) : null;
210
211 pt[0] += ancestor.getScrollX();
212 pt[1] += ancestor.getScrollY();
213
214 if (next != null) {
215 pt[0] -= next.getLeft();
216 pt[1] -= next.getTop();
217 next.getMatrix().invert(inverse);
218 inverse.mapPoints(pt);
219 scale *= next.getScaleX();
220 }
221 }
222
223 coord[0] = (int) Math.round(pt[0]);
224 coord[1] = (int) Math.round(pt[1]);
225 return scale;
226 }
227
Jason Monk02dd7ae2014-04-15 15:23:31 -0400228 /**
229 * Utility method to determine whether the given point, in local coordinates,
230 * is inside the view, where the area of the view is expanded by the slop factor.
231 * This method is called while processing touch-move events to determine if the event
232 * is still within the view.
233 */
234 public static boolean pointInView(View v, float localX, float localY, float slop) {
235 return localX >= -slop && localY >= -slop && localX < (v.getWidth() + slop) &&
236 localY < (v.getHeight() + slop);
237 }
238
Tony Wickham1bce7fd2016-04-28 17:39:03 -0700239 /** Translates MotionEvents from src's coordinate system to dst's. */
240 public static void translateEventCoordinates(View src, View dst, MotionEvent dstEvent) {
241 toGlobalMotionEvent(src, dstEvent);
242 toLocalMotionEvent(dst, dstEvent);
243 }
244
245 /**
246 * Emulates View.toGlobalMotionEvent(). This implementation does not handle transformations
247 * (scaleX, scaleY, etc).
248 */
249 private static void toGlobalMotionEvent(View view, MotionEvent event) {
250 view.getLocationOnScreen(sLoc0);
251 event.offsetLocation(sLoc0[0], sLoc0[1]);
252 }
253
254 /**
255 * Emulates View.toLocalMotionEvent(). This implementation does not handle transformations
256 * (scaleX, scaleY, etc).
257 */
258 private static void toLocalMotionEvent(View view, MotionEvent event) {
259 view.getLocationOnScreen(sLoc0);
260 event.offsetLocation(-sLoc0[0], -sLoc0[1]);
261 }
262
Adam Cohen63f1ec02014-08-12 09:23:13 -0700263 public static int[] getCenterDeltaInScreenSpace(View v0, View v1, int[] delta) {
264 v0.getLocationInWindow(sLoc0);
265 v1.getLocationInWindow(sLoc1);
266
267 sLoc0[0] += (v0.getMeasuredWidth() * v0.getScaleX()) / 2;
268 sLoc0[1] += (v0.getMeasuredHeight() * v0.getScaleY()) / 2;
269 sLoc1[0] += (v1.getMeasuredWidth() * v1.getScaleX()) / 2;
270 sLoc1[1] += (v1.getMeasuredHeight() * v1.getScaleY()) / 2;
271
272 if (delta == null) {
273 delta = new int[2];
274 }
275
276 delta[0] = sLoc1[0] - sLoc0[0];
277 delta[1] = sLoc1[1] - sLoc0[1];
278
279 return delta;
280 }
281
Winson Chung3a6e7f32013-10-09 15:50:52 -0700282 public static void scaleRectAboutCenter(Rect r, float scale) {
Sunny Goyal106bf642015-07-16 12:18:06 -0700283 if (scale != 1.0f) {
284 int cx = r.centerX();
285 int cy = r.centerY();
286 r.offset(-cx, -cy);
287
288 r.left = (int) (r.left * scale + 0.5f);
289 r.top = (int) (r.top * scale + 0.5f);
290 r.right = (int) (r.right * scale + 0.5f);
291 r.bottom = (int) (r.bottom * scale + 0.5f);
292
293 r.offset(cx, cy);
294 }
Winson Chung3a6e7f32013-10-09 15:50:52 -0700295 }
296
Michael Jurkaa805e1a2013-08-22 15:00:33 +0200297 public static void startActivityForResultSafely(
298 Activity activity, Intent intent, int requestCode) {
299 try {
300 activity.startActivityForResult(intent, requestCode);
301 } catch (ActivityNotFoundException e) {
302 Toast.makeText(activity, R.string.activity_not_found, Toast.LENGTH_SHORT).show();
303 } catch (SecurityException e) {
304 Toast.makeText(activity, R.string.activity_not_found, Toast.LENGTH_SHORT).show();
305 Log.e(TAG, "Launcher does not have the permission to launch " + intent +
306 ". Make sure to create a MAIN intent-filter for the corresponding activity " +
307 "or use the exported attribute for this activity.", e);
308 }
309 }
Sunny Goyalc5c60ad2014-07-14 12:02:01 -0700310
311 static boolean isSystemApp(Context context, Intent intent) {
312 PackageManager pm = context.getPackageManager();
313 ComponentName cn = intent.getComponent();
314 String packageName = null;
315 if (cn == null) {
316 ResolveInfo info = pm.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
317 if ((info != null) && (info.activityInfo != null)) {
318 packageName = info.activityInfo.packageName;
319 }
320 } else {
321 packageName = cn.getPackageName();
322 }
323 if (packageName != null) {
324 try {
325 PackageInfo info = pm.getPackageInfo(packageName, 0);
326 return (info != null) && (info.applicationInfo != null) &&
327 ((info.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0);
328 } catch (NameNotFoundException e) {
329 return false;
330 }
331 } else {
332 return false;
333 }
334 }
Sunny Goyal95abbb32014-08-04 10:53:22 -0700335
336 /**
337 * This picks a dominant color, looking for high-saturation, high-value, repeated hues.
338 * @param bitmap The bitmap to scan
339 * @param samples The approximate max number of samples to use.
340 */
341 static int findDominantColorByHue(Bitmap bitmap, int samples) {
342 final int height = bitmap.getHeight();
343 final int width = bitmap.getWidth();
344 int sampleStride = (int) Math.sqrt((height * width) / samples);
345 if (sampleStride < 1) {
346 sampleStride = 1;
347 }
348
349 // This is an out-param, for getting the hsv values for an rgb
350 float[] hsv = new float[3];
351
352 // First get the best hue, by creating a histogram over 360 hue buckets,
353 // where each pixel contributes a score weighted by saturation, value, and alpha.
354 float[] hueScoreHistogram = new float[360];
355 float highScore = -1;
356 int bestHue = -1;
357
358 for (int y = 0; y < height; y += sampleStride) {
359 for (int x = 0; x < width; x += sampleStride) {
360 int argb = bitmap.getPixel(x, y);
361 int alpha = 0xFF & (argb >> 24);
362 if (alpha < 0x80) {
363 // Drop mostly-transparent pixels.
364 continue;
365 }
366 // Remove the alpha channel.
367 int rgb = argb | 0xFF000000;
368 Color.colorToHSV(rgb, hsv);
369 // Bucket colors by the 360 integer hues.
370 int hue = (int) hsv[0];
371 if (hue < 0 || hue >= hueScoreHistogram.length) {
372 // Defensively avoid array bounds violations.
373 continue;
374 }
375 float score = hsv[1] * hsv[2];
376 hueScoreHistogram[hue] += score;
377 if (hueScoreHistogram[hue] > highScore) {
378 highScore = hueScoreHistogram[hue];
379 bestHue = hue;
380 }
381 }
382 }
383
384 SparseArray<Float> rgbScores = new SparseArray<Float>();
385 int bestColor = 0xff000000;
386 highScore = -1;
387 // Go back over the RGB colors that match the winning hue,
388 // creating a histogram of weighted s*v scores, for up to 100*100 [s,v] buckets.
389 // The highest-scoring RGB color wins.
390 for (int y = 0; y < height; y += sampleStride) {
391 for (int x = 0; x < width; x += sampleStride) {
392 int rgb = bitmap.getPixel(x, y) | 0xff000000;
393 Color.colorToHSV(rgb, hsv);
394 int hue = (int) hsv[0];
395 if (hue == bestHue) {
396 float s = hsv[1];
397 float v = hsv[2];
398 int bucket = (int) (s * 100) + (int) (v * 10000);
399 // Score by cumulative saturation * value.
400 float score = s * v;
401 Float oldTotal = rgbScores.get(bucket);
402 float newTotal = oldTotal == null ? score : oldTotal + score;
403 rgbScores.put(bucket, newTotal);
404 if (newTotal > highScore) {
405 highScore = newTotal;
406 // All the colors in the winning bucket are very similar. Last in wins.
407 bestColor = rgb;
408 }
409 }
410 }
411 }
412 return bestColor;
413 }
Sunny Goyal0fe505b2014-08-06 09:55:36 -0700414
415 /*
416 * Finds a system apk which had a broadcast receiver listening to a particular action.
417 * @param action intent action used to find the apk
418 * @return a pair of apk package name and the resources.
419 */
420 static Pair<String, Resources> findSystemApk(String action, PackageManager pm) {
421 final Intent intent = new Intent(action);
422 for (ResolveInfo info : pm.queryBroadcastReceivers(intent, 0)) {
423 if (info.activityInfo != null &&
424 (info.activityInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
425 final String packageName = info.activityInfo.packageName;
426 try {
427 final Resources res = pm.getResourcesForApplication(packageName);
428 return Pair.create(packageName, res);
429 } catch (NameNotFoundException e) {
430 Log.w(TAG, "Failed to find resources for " + packageName);
431 }
432 }
433 }
434 return null;
435 }
Sunny Goyalfafca522014-11-03 11:30:01 -0800436
Sunny Goyal594d76d2014-11-06 10:12:54 -0800437 /**
Sunny Goyal5b0e6692015-03-19 14:31:19 -0700438 * Compresses the bitmap to a byte array for serialization.
439 */
440 public static byte[] flattenBitmap(Bitmap bitmap) {
441 // Try go guesstimate how much space the icon will take when serialized
442 // to avoid unnecessary allocations/copies during the write.
443 int size = bitmap.getWidth() * bitmap.getHeight() * 4;
444 ByteArrayOutputStream out = new ByteArrayOutputStream(size);
445 try {
446 bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
447 out.flush();
448 out.close();
449 return out.toByteArray();
450 } catch (IOException e) {
451 Log.w(TAG, "Could not write bitmap");
452 return null;
453 }
454 }
455
Sunny Goyalf7a29e82015-04-24 15:20:43 -0700456 /**
Winson Chung82b016c2015-05-08 17:00:10 -0700457 * Trims the string, removing all whitespace at the beginning and end of the string.
458 * Non-breaking whitespaces are also removed.
459 */
460 public static String trim(CharSequence s) {
Winson Chungafa77e92015-05-15 12:04:03 -0700461 if (s == null) {
462 return null;
463 }
464
Winson Chung82b016c2015-05-08 17:00:10 -0700465 // Just strip any sequence of whitespace or java space characters from the beginning and end
466 Matcher m = sTrimPattern.matcher(s);
467 return m.replaceAll("$1");
468 }
Sunny Goyal70660032015-05-14 00:07:08 -0700469
Winson Chung2c6e5cc2015-06-01 14:38:24 -0700470 /**
471 * Calculates the height of a given string at a specific text size.
472 */
Sunny Goyalbaec6ff2016-09-14 11:26:21 -0700473 public static int calculateTextHeight(float textSizePx) {
Winson Chung2c6e5cc2015-06-01 14:38:24 -0700474 Paint p = new Paint();
475 p.setTextSize(textSizePx);
476 Paint.FontMetrics fm = p.getFontMetrics();
Sunny Goyalbaec6ff2016-09-14 11:26:21 -0700477 return (int) Math.ceil(fm.bottom - fm.top);
Winson Chung2c6e5cc2015-06-01 14:38:24 -0700478 }
479
Winson Chungb1777442015-06-16 13:35:04 -0700480 /**
481 * Convenience println with multiple args.
482 */
483 public static void println(String key, Object... args) {
484 StringBuilder b = new StringBuilder();
485 b.append(key);
486 b.append(": ");
487 boolean isFirstArgument = true;
488 for (Object arg : args) {
489 if (isFirstArgument) {
490 isFirstArgument = false;
491 } else {
492 b.append(", ");
493 }
494 b.append(arg);
495 }
496 System.out.println(b.toString());
497 }
498
Sunny Goyal70660032015-05-14 00:07:08 -0700499 @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
500 public static boolean isRtl(Resources res) {
Sunny Goyal9fc953b2015-08-17 12:24:25 -0700501 return ATLEAST_JB_MR1 &&
Sunny Goyal70660032015-05-14 00:07:08 -0700502 (res.getConfiguration().getLayoutDirection() == View.LAYOUT_DIRECTION_RTL);
503 }
Hyunyoung Song2bd3d7d2015-05-21 13:04:53 -0700504
Sunny Goyal5c97f512015-05-19 16:03:28 -0700505 /**
506 * Returns true if the intent is a valid launch intent for a launcher activity of an app.
507 * This is used to identify shortcuts which are different from the ones exposed by the
508 * applications' manifest file.
509 *
510 * @param launchIntent The intent that will be launched when the shortcut is clicked.
511 */
512 public static boolean isLauncherAppTarget(Intent launchIntent) {
Sunny Goyal4e5cc642015-06-25 16:37:44 -0700513 if (launchIntent != null
Sunny Goyal5c97f512015-05-19 16:03:28 -0700514 && Intent.ACTION_MAIN.equals(launchIntent.getAction())
515 && launchIntent.getComponent() != null
516 && launchIntent.getCategories() != null
517 && launchIntent.getCategories().size() == 1
518 && launchIntent.hasCategory(Intent.CATEGORY_LAUNCHER)
Sunny Goyal4e5cc642015-06-25 16:37:44 -0700519 && TextUtils.isEmpty(launchIntent.getDataString())) {
520 // An app target can either have no extra or have ItemInfo.EXTRA_PROFILE.
521 Bundle extras = launchIntent.getExtras();
522 if (extras == null) {
523 return true;
524 } else {
525 Set<String> keys = extras.keySet();
526 return keys.size() == 1 && keys.contains(ItemInfo.EXTRA_PROFILE);
527 }
528 };
529 return false;
Sunny Goyal5c97f512015-05-19 16:03:28 -0700530 }
Adam Cohen2e6da152015-05-06 11:42:25 -0700531
532 public static float dpiFromPx(int size, DisplayMetrics metrics){
533 float densityRatio = (float) metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT;
534 return (size / densityRatio);
535 }
536 public static int pxFromDp(float size, DisplayMetrics metrics) {
537 return (int) Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
538 size, metrics));
539 }
540 public static int pxFromSp(float size, DisplayMetrics metrics) {
541 return (int) Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,
542 size, metrics));
543 }
Sunny Goyalb1622cc2015-06-10 16:00:42 -0700544
545 public static String createDbSelectionQuery(String columnName, Iterable<?> values) {
546 return String.format(Locale.ENGLISH, "%s IN (%s)", columnName, TextUtils.join(", ", values));
547 }
Sunny Goyal25aba0a2015-07-16 15:07:47 -0700548
Sunny Goyal25aba0a2015-07-16 15:07:47 -0700549 public static boolean isBootCompleted() {
Sunny Goyaldfc8b662016-08-30 12:05:48 -0700550 return "1".equals(getSystemProperty("sys.boot_completed", "1"));
551 }
552
553 public static String getSystemProperty(String property, String defaultValue) {
Sunny Goyal25aba0a2015-07-16 15:07:47 -0700554 try {
555 Class clazz = Class.forName("android.os.SystemProperties");
556 Method getter = clazz.getDeclaredMethod("get", String.class);
Sunny Goyaldfc8b662016-08-30 12:05:48 -0700557 String value = (String) getter.invoke(null, property);
558 if (!TextUtils.isEmpty(value)) {
559 return value;
560 }
Sunny Goyal25aba0a2015-07-16 15:07:47 -0700561 } catch (Exception e) {
562 Log.d(TAG, "Unable to read system properties");
Sunny Goyal25aba0a2015-07-16 15:07:47 -0700563 }
Sunny Goyaldfc8b662016-08-30 12:05:48 -0700564 return defaultValue;
Sunny Goyal25aba0a2015-07-16 15:07:47 -0700565 }
Tony Wickham29d853c2015-09-08 10:35:56 -0700566
567 /**
568 * Ensures that a value is within given bounds. Specifically:
569 * If value is less than lowerBound, return lowerBound; else if value is greater than upperBound,
570 * return upperBound; else return value unchanged.
571 */
Tony Wickhamf549dab2016-05-16 09:54:06 -0700572 public static int boundToRange(int value, int lowerBound, int upperBound) {
573 return Math.max(lowerBound, Math.min(value, upperBound));
574 }
575
576 /**
577 * @see #boundToRange(int, int, int).
578 */
579 public static float boundToRange(float value, float lowerBound, float upperBound) {
Tony Wickham29d853c2015-09-08 10:35:56 -0700580 return Math.max(lowerBound, Math.min(value, upperBound));
581 }
Sunny Goyal9d438082015-09-25 11:50:16 -0700582
Sunny Goyale78e3d72015-09-24 11:23:31 -0700583 /**
584 * Wraps a message with a TTS span, so that a different message is spoken than
585 * what is getting displayed.
586 * @param msg original message
587 * @param ttsMsg message to be spoken
588 */
589 @TargetApi(Build.VERSION_CODES.LOLLIPOP)
590 public static CharSequence wrapForTts(CharSequence msg, String ttsMsg) {
591 if (Utilities.ATLEAST_LOLLIPOP) {
592 SpannableString spanned = new SpannableString(msg);
593 spanned.setSpan(new TtsSpan.TextBuilder(ttsMsg).build(),
594 0, spanned.length(), Spannable.SPAN_INCLUSIVE_INCLUSIVE);
595 return spanned;
596 } else {
597 return msg;
598 }
599 }
Winson12fb9fc2015-10-01 15:34:08 -0700600
601 /**
602 * Replacement for Long.compare() which was added in API level 19.
603 */
604 public static int longCompare(long lhs, long rhs) {
605 return lhs < rhs ? -1 : (lhs == rhs ? 0 : 1);
606 }
Sunny Goyalf7258242015-10-19 16:59:07 -0700607
608 public static SharedPreferences getPrefs(Context context) {
609 return context.getSharedPreferences(
610 LauncherFiles.SHARED_PREFERENCES_KEY, Context.MODE_PRIVATE);
611 }
Tony Wickham112ac952015-11-12 12:31:50 -0800612
613 @TargetApi(Build.VERSION_CODES.LOLLIPOP)
614 public static boolean isPowerSaverOn(Context context) {
615 PowerManager powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
616 return ATLEAST_LOLLIPOP && powerManager.isPowerSaveMode();
617 }
Sunny Goyale1483fb2016-01-08 12:16:15 -0800618
Hyunyoung Song0de01172016-10-05 16:27:48 -0700619 public static boolean isWallpaperAllowed(Context context) {
Sunny Goyalf5e37442016-11-02 10:31:24 -0700620 if (ATLEAST_NOUGAT) {
Sunny Goyal1ed6c4a2016-04-21 15:16:11 -0700621 try {
622 WallpaperManager wm = context.getSystemService(WallpaperManager.class);
Kenny Guy367da9f2016-05-25 19:22:14 +0100623 return (Boolean) wm.getClass().getDeclaredMethod("isSetWallpaperAllowed")
Sunny Goyal1ed6c4a2016-04-21 15:16:11 -0700624 .invoke(wm);
625 } catch (Exception e) { }
626 }
627 return true;
628 }
629
Sunny Goyal713edfc2016-05-06 09:58:34 -0700630 public static void closeSilently(Closeable c) {
631 if (c != null) {
632 try {
633 c.close();
634 } catch (IOException e) {
635 if (ProviderConfig.IS_DOGFOOD_BUILD) {
636 Log.d(TAG, "Error closing", e);
637 }
638 }
639 }
640 }
641
Sunny Goyale1483fb2016-01-08 12:16:15 -0800642 /**
Sunny Goyal3f732192016-05-13 13:48:44 -0700643 * Returns true if {@param original} contains all entries defined in {@param updates} and
644 * have the same value.
645 * The comparison uses {@link Object#equals(Object)} to compare the values.
646 */
647 public static boolean containsAll(Bundle original, Bundle updates) {
648 for (String key : updates.keySet()) {
649 Object value1 = updates.get(key);
650 Object value2 = original.get(key);
651 if (value1 == null) {
652 if (value2 != null) {
653 return false;
654 }
655 } else if (!value1.equals(value2)) {
656 return false;
657 }
658 }
659 return true;
660 }
661
Tony Wickham1bce7fd2016-04-28 17:39:03 -0700662 /** Returns whether the collection is null or empty. */
663 public static boolean isEmpty(Collection c) {
664 return c == null || c.isEmpty();
665 }
666
Andrew Sappersteinabef55a2016-06-19 12:49:00 -0700667 public static int getColorAccent(Context context) {
668 TypedArray ta = context.obtainStyledAttributes(new int[]{android.R.attr.colorAccent});
669 int colorAccent = ta.getColor(0, 0);
670 ta.recycle();
671 return colorAccent;
672 }
Sunny Goyal52851aa2016-09-02 10:41:43 -0700673
674 public static void sendCustomAccessibilityEvent(View target, int type, String text) {
675 AccessibilityManager accessibilityManager = (AccessibilityManager)
676 target.getContext().getSystemService(Context.ACCESSIBILITY_SERVICE);
677 if (accessibilityManager.isEnabled()) {
678 AccessibilityEvent event = AccessibilityEvent.obtain(type);
679 target.onInitializeAccessibilityEvent(event);
680 event.getText().add(text);
681 accessibilityManager.sendAccessibilityEvent(event);
682 }
683 }
The Android Open Source Project31dd5032009-03-03 19:32:27 -0800684}