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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 Goyal594d76d2014-11-06 10:12:54 -080021import android.app.SearchManager;
22import android.appwidget.AppWidgetManager;
23import android.appwidget.AppWidgetProviderInfo;
Michael Jurkaa805e1a2013-08-22 15:00:33 +020024import android.content.ActivityNotFoundException;
Sunny Goyalc5c60ad2014-07-14 12:02:01 -070025import android.content.ComponentName;
Winson Chungaafa03c2010-06-11 17:34:16 -070026import android.content.Context;
Michael Jurkaa805e1a2013-08-22 15:00:33 +020027import android.content.Intent;
Rahul Chaturvedi7fc77ca2015-05-19 18:02:16 -070028import android.content.SharedPreferences;
Sunny Goyalc5c60ad2014-07-14 12:02:01 -070029import android.content.pm.ApplicationInfo;
30import android.content.pm.PackageInfo;
31import android.content.pm.PackageManager;
32import android.content.pm.PackageManager.NameNotFoundException;
33import android.content.pm.ResolveInfo;
Winson Chungaafa03c2010-06-11 17:34:16 -070034import android.content.res.Resources;
Sunny Goyal4fbc3822015-02-18 16:46:50 -080035import android.database.Cursor;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080036import android.graphics.Bitmap;
Sunny Goyal4fbc3822015-02-18 16:46:50 -080037import android.graphics.BitmapFactory;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080038import android.graphics.Canvas;
Sunny Goyal95abbb32014-08-04 10:53:22 -070039import android.graphics.Color;
Winson Chungc763c4e2013-07-19 13:49:06 -070040import android.graphics.Matrix;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080041import android.graphics.Paint;
Joe Onoratobf15cb42009-08-07 14:33:40 -070042import android.graphics.PaintFlagsDrawFilter;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080043import android.graphics.Rect;
Winson Chungaafa03c2010-06-11 17:34:16 -070044import android.graphics.drawable.BitmapDrawable;
45import android.graphics.drawable.Drawable;
46import android.graphics.drawable.PaintDrawable;
Sandeep Siddhartha2efc7d92014-05-16 17:21:15 -070047import android.os.Build;
Sunny Goyal4e5cc642015-06-25 16:37:44 -070048import android.os.Bundle;
Hyunyoung Song2bd3d7d2015-05-21 13:04:53 -070049import android.os.Process;
Sunny Goyal5c97f512015-05-19 16:03:28 -070050import android.text.TextUtils;
Adam Cohen2e6da152015-05-06 11:42:25 -070051import android.util.DisplayMetrics;
Michael Jurkaa805e1a2013-08-22 15:00:33 +020052import android.util.Log;
Sunny Goyal0fe505b2014-08-06 09:55:36 -070053import android.util.Pair;
Sunny Goyal95abbb32014-08-04 10:53:22 -070054import android.util.SparseArray;
Adam Cohen2e6da152015-05-06 11:42:25 -070055import android.util.TypedValue;
Winson Chungc763c4e2013-07-19 13:49:06 -070056import android.view.View;
Michael Jurkaa805e1a2013-08-22 15:00:33 +020057import android.widget.Toast;
Sunny Goyalb1622cc2015-06-10 16:00:42 -070058
Sunny Goyal6c56c682015-07-16 14:09:05 -070059import com.android.launcher3.config.ProviderConfig;
60
Sunny Goyal5b0e6692015-03-19 14:31:19 -070061import java.io.ByteArrayOutputStream;
62import java.io.IOException;
Sunny Goyal25aba0a2015-07-16 15:07:47 -070063import java.lang.reflect.Method;
Winson Chungc763c4e2013-07-19 13:49:06 -070064import java.util.ArrayList;
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
The Android Open Source Project31dd5032009-03-03 19:32:27 -080081 private static final Rect sOldBounds = new Rect();
Romain Guy89911d22009-09-28 18:48:49 -070082 private static final Canvas sCanvas = new Canvas();
The Android Open Source Project31dd5032009-03-03 19:32:27 -080083
Winson Chung82b016c2015-05-08 17:00:10 -070084 private static final Pattern sTrimPattern =
85 Pattern.compile("^[\\s|\\p{javaSpaceChar}]*(.*)[\\s|\\p{javaSpaceChar}]*$");
86
The Android Open Source Project31dd5032009-03-03 19:32:27 -080087 static {
88 sCanvas.setDrawFilter(new PaintFlagsDrawFilter(Paint.DITHER_FLAG,
89 Paint.FILTER_BITMAP_FLAG));
90 }
Joe Onorato6665c0f2009-09-02 15:27:24 -070091 static int sColors[] = { 0xffff0000, 0xff00ff00, 0xff0000ff };
92 static int sColorIndex = 0;
93
Sunny Goyal53d7ee42015-05-22 12:25:45 -070094 private static final int[] sLoc0 = new int[2];
95 private static final int[] sLoc1 = new int[2];
Michael Jurka7ad868b2013-12-12 15:04:25 +010096
Sunny Goyal9fc953b2015-08-17 12:24:25 -070097 // TODO: use Build.VERSION_CODES when available
98 public static final boolean ATLEAST_MARSHMALLOW = Build.VERSION.SDK_INT >= 23;
99
100 public static final boolean ATLEAST_LOLLIPOP_MR1 =
101 Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1;
102
103 public static final boolean ATLEAST_LOLLIPOP =
104 Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP;
105
106 public static final boolean ATLEAST_KITKAT =
107 Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
108
109 public static final boolean ATLEAST_JB_MR1 =
110 Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1;
111
112 public static final boolean ATLEAST_JB_MR2 =
113 Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2;
114
Sunny Goyal8ac727b2015-09-23 15:38:09 -0700115 // These values are same as that in {@link AsyncTask}.
116 private static final int CPU_COUNT = Runtime.getRuntime().availableProcessors();
117 private static final int CORE_POOL_SIZE = CPU_COUNT + 1;
118 private static final int MAXIMUM_POOL_SIZE = CPU_COUNT * 2 + 1;
119 private static final int KEEP_ALIVE = 1;
120 /**
121 * An {@link Executor} to be used with async task with no limit on the queue size.
122 */
123 public static final Executor THREAD_POOL_EXECUTOR = new ThreadPoolExecutor(
124 CORE_POOL_SIZE, MAXIMUM_POOL_SIZE, KEEP_ALIVE,
125 TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
126
Michael Jurka7ad868b2013-12-12 15:04:25 +0100127 // To turn on these properties, type
128 // adb shell setprop log.tag.PROPERTY_NAME [VERBOSE | SUPPRESS]
Sunny Goyal53d7ee42015-05-22 12:25:45 -0700129 private static final String FORCE_ENABLE_ROTATION_PROPERTY = "launcher_force_rotate";
130 private static boolean sForceEnableRotation = isPropertyEnabled(FORCE_ENABLE_ROTATION_PROPERTY);
Michael Jurka7ad868b2013-12-12 15:04:25 +0100131
Rahul Chaturvedi7fc77ca2015-05-19 18:02:16 -0700132 public static final String ALLOW_ROTATION_PREFERENCE_KEY = "pref_allowRotation";
133
Sunny Goyal4bbf4192014-11-11 12:23:59 -0800134 public static boolean isPropertyEnabled(String propertyName) {
Michael Jurka7ad868b2013-12-12 15:04:25 +0100135 return Log.isLoggable(propertyName, Log.VERBOSE);
136 }
137
Sunny Goyal21bf5312015-08-21 11:08:24 -0700138 public static boolean isAllowRotationPrefEnabled(Context context) {
Sunny Goyal7779d622015-06-11 16:18:39 -0700139 SharedPreferences sharedPrefs = context.getSharedPreferences(
Sunny Goyal21bf5312015-08-21 11:08:24 -0700140 LauncherAppState.getSharedPreferencesKey(), Context.MODE_PRIVATE);
Rahul Chaturvedi7fc77ca2015-05-19 18:02:16 -0700141 boolean allowRotationPref = sharedPrefs.getBoolean(ALLOW_ROTATION_PREFERENCE_KEY, false);
142 return sForceEnableRotation || allowRotationPref;
143 }
144
145 public static boolean isRotationAllowedForDevice(Context context) {
146 return sForceEnableRotation || context.getResources().getBoolean(R.bool.allow_rotation);
Michael Jurka7ad868b2013-12-12 15:04:25 +0100147 }
148
Vadim Tryshev9de91272015-08-03 18:37:17 -0700149 public static boolean isNycOrAbove() {
150 // TODO(vadimt): Replace using reflection with looking at the API version once
151 // Build.VERSION.SDK_INT gets bumped to 24. b/22942492.
152 try {
153 View.class.getDeclaredField("DRAG_FLAG_OPAQUE");
154 // View.DRAG_FLAG_OPAQUE doesn't exist in M-release, so it's an indication of N+.
155 return true;
156 } catch (NoSuchFieldException e) {
157 return false;
158 }
159 }
160
Sunny Goyal53d7ee42015-05-22 12:25:45 -0700161 public static Bitmap createIconBitmap(Cursor c, int iconIndex, Context context) {
Sunny Goyal4fbc3822015-02-18 16:46:50 -0800162 byte[] data = c.getBlob(iconIndex);
163 try {
164 return createIconBitmap(BitmapFactory.decodeByteArray(data, 0, data.length), context);
165 } catch (Exception e) {
166 return null;
167 }
168 }
169
Sandeep Siddhartha2efc7d92014-05-16 17:21:15 -0700170 /**
Sunny Goyalb50cc8c2014-10-06 16:23:56 -0700171 * Returns a bitmap suitable for the all apps view. If the package or the resource do not
172 * exist, it returns null.
173 */
Sunny Goyal53d7ee42015-05-22 12:25:45 -0700174 public static Bitmap createIconBitmap(String packageName, String resourceName,
Sunny Goyalb50cc8c2014-10-06 16:23:56 -0700175 Context context) {
176 PackageManager packageManager = context.getPackageManager();
177 // the resource
178 try {
179 Resources resources = packageManager.getResourcesForApplication(packageName);
180 if (resources != null) {
181 final int id = resources.getIdentifier(resourceName, null, null);
182 return createIconBitmap(
Sunny Goyal53d7ee42015-05-22 12:25:45 -0700183 resources.getDrawableForDensity(id, LauncherAppState.getInstance()
184 .getInvariantDeviceProfile().fillResIconDpi), context);
Sunny Goyalb50cc8c2014-10-06 16:23:56 -0700185 }
186 } catch (Exception e) {
187 // Icon not found.
188 }
189 return null;
190 }
191
Sunny Goyal53d7ee42015-05-22 12:25:45 -0700192 private static int getIconBitmapSize() {
193 return LauncherAppState.getInstance().getInvariantDeviceProfile().iconBitmapSize;
194 }
195
Sunny Goyalb50cc8c2014-10-06 16:23:56 -0700196 /**
Sunny Goyal2fce90c2014-10-07 12:01:58 -0700197 * Returns a bitmap which is of the appropriate size to be displayed as an icon
Michael Jurka931dc972011-08-05 15:08:15 -0700198 */
Sunny Goyal53d7ee42015-05-22 12:25:45 -0700199 public static Bitmap createIconBitmap(Bitmap icon, Context context) {
200 final int iconBitmapSize = getIconBitmapSize();
201 if (iconBitmapSize == icon.getWidth() && iconBitmapSize == icon.getHeight()) {
Sunny Goyal2fce90c2014-10-07 12:01:58 -0700202 return icon;
203 }
204 return createIconBitmap(new BitmapDrawable(context.getResources(), icon), context);
Michael Jurka931dc972011-08-05 15:08:15 -0700205 }
206
207 /**
208 * Returns a bitmap suitable for the all apps view.
Joe Onorato6665c0f2009-09-02 15:27:24 -0700209 */
Mathew Inwood72fbec12013-11-19 15:45:07 +0000210 public static Bitmap createIconBitmap(Drawable icon, Context context) {
Sunny Goyal53d7ee42015-05-22 12:25:45 -0700211 synchronized (sCanvas) {
212 final int iconBitmapSize = getIconBitmapSize();
Joe Onorato6665c0f2009-09-02 15:27:24 -0700213
Sunny Goyal53d7ee42015-05-22 12:25:45 -0700214 int width = iconBitmapSize;
215 int height = iconBitmapSize;
Joe Onorato6665c0f2009-09-02 15:27:24 -0700216
Joe Onorato6665c0f2009-09-02 15:27:24 -0700217 if (icon instanceof PaintDrawable) {
218 PaintDrawable painter = (PaintDrawable) icon;
219 painter.setIntrinsicWidth(width);
220 painter.setIntrinsicHeight(height);
221 } else if (icon instanceof BitmapDrawable) {
222 // Ensure the bitmap has a density.
223 BitmapDrawable bitmapDrawable = (BitmapDrawable) icon;
224 Bitmap bitmap = bitmapDrawable.getBitmap();
225 if (bitmap.getDensity() == Bitmap.DENSITY_NONE) {
226 bitmapDrawable.setTargetDensity(context.getResources().getDisplayMetrics());
227 }
228 }
229 int sourceWidth = icon.getIntrinsicWidth();
230 int sourceHeight = icon.getIntrinsicHeight();
Michael Jurka931dc972011-08-05 15:08:15 -0700231 if (sourceWidth > 0 && sourceHeight > 0) {
Winson Chung5f8afe62013-08-12 16:19:28 -0700232 // Scale the icon proportionally to the icon dimensions
233 final float ratio = (float) sourceWidth / sourceHeight;
234 if (sourceWidth > sourceHeight) {
235 height = (int) (width / ratio);
236 } else if (sourceHeight > sourceWidth) {
237 width = (int) (height * ratio);
Joe Onorato6665c0f2009-09-02 15:27:24 -0700238 }
239 }
240
241 // no intrinsic size --> use default size
Sunny Goyal53d7ee42015-05-22 12:25:45 -0700242 int textureWidth = iconBitmapSize;
243 int textureHeight = iconBitmapSize;
Joe Onorato6665c0f2009-09-02 15:27:24 -0700244
245 final Bitmap bitmap = Bitmap.createBitmap(textureWidth, textureHeight,
246 Bitmap.Config.ARGB_8888);
247 final Canvas canvas = sCanvas;
248 canvas.setBitmap(bitmap);
249
250 final int left = (textureWidth-width) / 2;
251 final int top = (textureHeight-height) / 2;
252
Michael Jurka3a9fced2012-04-13 14:44:29 -0700253 @SuppressWarnings("all") // suppress dead code warning
254 final boolean debug = false;
255 if (debug) {
Joe Onorato6665c0f2009-09-02 15:27:24 -0700256 // draw a big box for the icon for debugging
257 canvas.drawColor(sColors[sColorIndex]);
258 if (++sColorIndex >= sColors.length) sColorIndex = 0;
259 Paint debugPaint = new Paint();
260 debugPaint.setColor(0xffcccc00);
261 canvas.drawRect(left, top, left+width, top+height, debugPaint);
262 }
263
264 sOldBounds.set(icon.getBounds());
265 icon.setBounds(left, top, left+width, top+height);
266 icon.draw(canvas);
267 icon.setBounds(sOldBounds);
Adam Cohenaaf473c2011-08-03 12:02:47 -0700268 canvas.setBitmap(null);
Joe Onorato6665c0f2009-09-02 15:27:24 -0700269
270 return bitmap;
271 }
272 }
273
The Android Open Source Project31dd5032009-03-03 19:32:27 -0800274 /**
Winson Chungc763c4e2013-07-19 13:49:06 -0700275 * Given a coordinate relative to the descendant, find the coordinate in a parent view's
276 * coordinates.
277 *
278 * @param descendant The descendant to which the passed coordinate is relative.
279 * @param root The root view to make the coordinates relative to.
280 * @param coord The coordinate that we want mapped.
281 * @param includeRootScroll Whether or not to account for the scroll of the descendant:
282 * sometimes this is relevant as in a child's coordinates within the descendant.
283 * @return The factor by which this descendant is scaled relative to this DragLayer. Caution
284 * this scale factor is assumed to be equal in X and Y, and so if at any point this
285 * assumption fails, we will need to return a pair of scale factors.
286 */
287 public static float getDescendantCoordRelativeToParent(View descendant, View root,
288 int[] coord, boolean includeRootScroll) {
289 ArrayList<View> ancestorChain = new ArrayList<View>();
290
291 float[] pt = {coord[0], coord[1]};
292
293 View v = descendant;
294 while(v != root && v != null) {
295 ancestorChain.add(v);
296 v = (View) v.getParent();
297 }
298 ancestorChain.add(root);
299
300 float scale = 1.0f;
301 int count = ancestorChain.size();
302 for (int i = 0; i < count; i++) {
303 View v0 = ancestorChain.get(i);
Winson Chungc763c4e2013-07-19 13:49:06 -0700304 // For TextViews, scroll has a meaning which relates to the text position
305 // which is very strange... ignore the scroll.
306 if (v0 != descendant || includeRootScroll) {
307 pt[0] -= v0.getScrollX();
308 pt[1] -= v0.getScrollY();
309 }
310
311 v0.getMatrix().mapPoints(pt);
312 pt[0] += v0.getLeft();
313 pt[1] += v0.getTop();
314 scale *= v0.getScaleX();
315 }
316
317 coord[0] = (int) Math.round(pt[0]);
318 coord[1] = (int) Math.round(pt[1]);
319 return scale;
320 }
321
322 /**
323 * Inverse of {@link #getDescendantCoordRelativeToSelf(View, int[])}.
324 */
325 public static float mapCoordInSelfToDescendent(View descendant, View root,
326 int[] coord) {
327 ArrayList<View> ancestorChain = new ArrayList<View>();
328
329 float[] pt = {coord[0], coord[1]};
330
331 View v = descendant;
332 while(v != root) {
333 ancestorChain.add(v);
334 v = (View) v.getParent();
335 }
336 ancestorChain.add(root);
337
338 float scale = 1.0f;
339 Matrix inverse = new Matrix();
340 int count = ancestorChain.size();
341 for (int i = count - 1; i >= 0; i--) {
342 View ancestor = ancestorChain.get(i);
343 View next = i > 0 ? ancestorChain.get(i-1) : null;
344
345 pt[0] += ancestor.getScrollX();
346 pt[1] += ancestor.getScrollY();
347
348 if (next != null) {
349 pt[0] -= next.getLeft();
350 pt[1] -= next.getTop();
351 next.getMatrix().invert(inverse);
352 inverse.mapPoints(pt);
353 scale *= next.getScaleX();
354 }
355 }
356
357 coord[0] = (int) Math.round(pt[0]);
358 coord[1] = (int) Math.round(pt[1]);
359 return scale;
360 }
361
Jason Monk02dd7ae2014-04-15 15:23:31 -0400362 /**
363 * Utility method to determine whether the given point, in local coordinates,
364 * is inside the view, where the area of the view is expanded by the slop factor.
365 * This method is called while processing touch-move events to determine if the event
366 * is still within the view.
367 */
368 public static boolean pointInView(View v, float localX, float localY, float slop) {
369 return localX >= -slop && localY >= -slop && localX < (v.getWidth() + slop) &&
370 localY < (v.getHeight() + slop);
371 }
372
Adam Cohen63f1ec02014-08-12 09:23:13 -0700373 public static int[] getCenterDeltaInScreenSpace(View v0, View v1, int[] delta) {
374 v0.getLocationInWindow(sLoc0);
375 v1.getLocationInWindow(sLoc1);
376
377 sLoc0[0] += (v0.getMeasuredWidth() * v0.getScaleX()) / 2;
378 sLoc0[1] += (v0.getMeasuredHeight() * v0.getScaleY()) / 2;
379 sLoc1[0] += (v1.getMeasuredWidth() * v1.getScaleX()) / 2;
380 sLoc1[1] += (v1.getMeasuredHeight() * v1.getScaleY()) / 2;
381
382 if (delta == null) {
383 delta = new int[2];
384 }
385
386 delta[0] = sLoc1[0] - sLoc0[0];
387 delta[1] = sLoc1[1] - sLoc0[1];
388
389 return delta;
390 }
391
Winson Chung3a6e7f32013-10-09 15:50:52 -0700392 public static void scaleRectAboutCenter(Rect r, float scale) {
Sunny Goyal106bf642015-07-16 12:18:06 -0700393 if (scale != 1.0f) {
394 int cx = r.centerX();
395 int cy = r.centerY();
396 r.offset(-cx, -cy);
397
398 r.left = (int) (r.left * scale + 0.5f);
399 r.top = (int) (r.top * scale + 0.5f);
400 r.right = (int) (r.right * scale + 0.5f);
401 r.bottom = (int) (r.bottom * scale + 0.5f);
402
403 r.offset(cx, cy);
404 }
Winson Chung3a6e7f32013-10-09 15:50:52 -0700405 }
406
Michael Jurkaa805e1a2013-08-22 15:00:33 +0200407 public static void startActivityForResultSafely(
408 Activity activity, Intent intent, int requestCode) {
409 try {
410 activity.startActivityForResult(intent, requestCode);
411 } catch (ActivityNotFoundException e) {
412 Toast.makeText(activity, R.string.activity_not_found, Toast.LENGTH_SHORT).show();
413 } catch (SecurityException e) {
414 Toast.makeText(activity, R.string.activity_not_found, Toast.LENGTH_SHORT).show();
415 Log.e(TAG, "Launcher does not have the permission to launch " + intent +
416 ". Make sure to create a MAIN intent-filter for the corresponding activity " +
417 "or use the exported attribute for this activity.", e);
418 }
419 }
Sunny Goyalc5c60ad2014-07-14 12:02:01 -0700420
421 static boolean isSystemApp(Context context, Intent intent) {
422 PackageManager pm = context.getPackageManager();
423 ComponentName cn = intent.getComponent();
424 String packageName = null;
425 if (cn == null) {
426 ResolveInfo info = pm.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
427 if ((info != null) && (info.activityInfo != null)) {
428 packageName = info.activityInfo.packageName;
429 }
430 } else {
431 packageName = cn.getPackageName();
432 }
433 if (packageName != null) {
434 try {
435 PackageInfo info = pm.getPackageInfo(packageName, 0);
436 return (info != null) && (info.applicationInfo != null) &&
437 ((info.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0);
438 } catch (NameNotFoundException e) {
439 return false;
440 }
441 } else {
442 return false;
443 }
444 }
Sunny Goyal95abbb32014-08-04 10:53:22 -0700445
446 /**
447 * This picks a dominant color, looking for high-saturation, high-value, repeated hues.
448 * @param bitmap The bitmap to scan
449 * @param samples The approximate max number of samples to use.
450 */
451 static int findDominantColorByHue(Bitmap bitmap, int samples) {
452 final int height = bitmap.getHeight();
453 final int width = bitmap.getWidth();
454 int sampleStride = (int) Math.sqrt((height * width) / samples);
455 if (sampleStride < 1) {
456 sampleStride = 1;
457 }
458
459 // This is an out-param, for getting the hsv values for an rgb
460 float[] hsv = new float[3];
461
462 // First get the best hue, by creating a histogram over 360 hue buckets,
463 // where each pixel contributes a score weighted by saturation, value, and alpha.
464 float[] hueScoreHistogram = new float[360];
465 float highScore = -1;
466 int bestHue = -1;
467
468 for (int y = 0; y < height; y += sampleStride) {
469 for (int x = 0; x < width; x += sampleStride) {
470 int argb = bitmap.getPixel(x, y);
471 int alpha = 0xFF & (argb >> 24);
472 if (alpha < 0x80) {
473 // Drop mostly-transparent pixels.
474 continue;
475 }
476 // Remove the alpha channel.
477 int rgb = argb | 0xFF000000;
478 Color.colorToHSV(rgb, hsv);
479 // Bucket colors by the 360 integer hues.
480 int hue = (int) hsv[0];
481 if (hue < 0 || hue >= hueScoreHistogram.length) {
482 // Defensively avoid array bounds violations.
483 continue;
484 }
485 float score = hsv[1] * hsv[2];
486 hueScoreHistogram[hue] += score;
487 if (hueScoreHistogram[hue] > highScore) {
488 highScore = hueScoreHistogram[hue];
489 bestHue = hue;
490 }
491 }
492 }
493
494 SparseArray<Float> rgbScores = new SparseArray<Float>();
495 int bestColor = 0xff000000;
496 highScore = -1;
497 // Go back over the RGB colors that match the winning hue,
498 // creating a histogram of weighted s*v scores, for up to 100*100 [s,v] buckets.
499 // The highest-scoring RGB color wins.
500 for (int y = 0; y < height; y += sampleStride) {
501 for (int x = 0; x < width; x += sampleStride) {
502 int rgb = bitmap.getPixel(x, y) | 0xff000000;
503 Color.colorToHSV(rgb, hsv);
504 int hue = (int) hsv[0];
505 if (hue == bestHue) {
506 float s = hsv[1];
507 float v = hsv[2];
508 int bucket = (int) (s * 100) + (int) (v * 10000);
509 // Score by cumulative saturation * value.
510 float score = s * v;
511 Float oldTotal = rgbScores.get(bucket);
512 float newTotal = oldTotal == null ? score : oldTotal + score;
513 rgbScores.put(bucket, newTotal);
514 if (newTotal > highScore) {
515 highScore = newTotal;
516 // All the colors in the winning bucket are very similar. Last in wins.
517 bestColor = rgb;
518 }
519 }
520 }
521 }
522 return bestColor;
523 }
Sunny Goyal0fe505b2014-08-06 09:55:36 -0700524
525 /*
526 * Finds a system apk which had a broadcast receiver listening to a particular action.
527 * @param action intent action used to find the apk
528 * @return a pair of apk package name and the resources.
529 */
530 static Pair<String, Resources> findSystemApk(String action, PackageManager pm) {
531 final Intent intent = new Intent(action);
532 for (ResolveInfo info : pm.queryBroadcastReceivers(intent, 0)) {
533 if (info.activityInfo != null &&
534 (info.activityInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
535 final String packageName = info.activityInfo.packageName;
536 try {
537 final Resources res = pm.getResourcesForApplication(packageName);
538 return Pair.create(packageName, res);
539 } catch (NameNotFoundException e) {
540 Log.w(TAG, "Failed to find resources for " + packageName);
541 }
542 }
543 }
544 return null;
545 }
Sunny Goyalfafca522014-11-03 11:30:01 -0800546
Sunny Goyal594d76d2014-11-06 10:12:54 -0800547 /**
548 * Returns a widget with category {@link AppWidgetProviderInfo#WIDGET_CATEGORY_SEARCHBOX}
549 * provided by the same package which is set to be global search activity.
550 * If widgetCategory is not supported, or no such widget is found, returns the first widget
551 * provided by the package.
552 */
553 @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
554 public static AppWidgetProviderInfo getSearchWidgetProvider(Context context) {
555 SearchManager searchManager =
556 (SearchManager) context.getSystemService(Context.SEARCH_SERVICE);
557 ComponentName searchComponent = searchManager.getGlobalSearchActivity();
558 if (searchComponent == null) return null;
559 String providerPkg = searchComponent.getPackageName();
560
561 AppWidgetProviderInfo defaultWidgetForSearchPackage = null;
562
563 AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
564 for (AppWidgetProviderInfo info : appWidgetManager.getInstalledProviders()) {
565 if (info.provider.getPackageName().equals(providerPkg)) {
Sunny Goyal9fc953b2015-08-17 12:24:25 -0700566 if (ATLEAST_JB_MR1) {
Sunny Goyal594d76d2014-11-06 10:12:54 -0800567 if ((info.widgetCategory & AppWidgetProviderInfo.WIDGET_CATEGORY_SEARCHBOX) != 0) {
568 return info;
569 } else if (defaultWidgetForSearchPackage == null) {
570 defaultWidgetForSearchPackage = info;
571 }
572 } else {
573 return info;
574 }
575 }
576 }
577 return defaultWidgetForSearchPackage;
578 }
Sunny Goyal08f72612015-01-05 13:41:43 -0800579
Sunny Goyal5b0e6692015-03-19 14:31:19 -0700580 /**
581 * Compresses the bitmap to a byte array for serialization.
582 */
583 public static byte[] flattenBitmap(Bitmap bitmap) {
584 // Try go guesstimate how much space the icon will take when serialized
585 // to avoid unnecessary allocations/copies during the write.
586 int size = bitmap.getWidth() * bitmap.getHeight() * 4;
587 ByteArrayOutputStream out = new ByteArrayOutputStream(size);
588 try {
589 bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
590 out.flush();
591 out.close();
592 return out.toByteArray();
593 } catch (IOException e) {
594 Log.w(TAG, "Could not write bitmap");
595 return null;
596 }
597 }
598
Sunny Goyalf7a29e82015-04-24 15:20:43 -0700599 /**
600 * Find the first vacant cell, if there is one.
601 *
602 * @param vacant Holds the x and y coordinate of the vacant cell
603 * @param spanX Horizontal cell span.
604 * @param spanY Vertical cell span.
605 *
606 * @return true if a vacant cell was found
607 */
608 public static boolean findVacantCell(int[] vacant, int spanX, int spanY,
609 int xCount, int yCount, boolean[][] occupied) {
610
611 for (int y = 0; (y + spanY) <= yCount; y++) {
612 for (int x = 0; (x + spanX) <= xCount; x++) {
613 boolean available = !occupied[x][y];
614 out: for (int i = x; i < x + spanX; i++) {
615 for (int j = y; j < y + spanY; j++) {
616 available = available && !occupied[i][j];
617 if (!available) break out;
618 }
619 }
620
621 if (available) {
622 vacant[0] = x;
623 vacant[1] = y;
624 return true;
625 }
626 }
627 }
628
629 return false;
630 }
Winson Chung82b016c2015-05-08 17:00:10 -0700631
632 /**
633 * Trims the string, removing all whitespace at the beginning and end of the string.
634 * Non-breaking whitespaces are also removed.
635 */
636 public static String trim(CharSequence s) {
Winson Chungafa77e92015-05-15 12:04:03 -0700637 if (s == null) {
638 return null;
639 }
640
Winson Chung82b016c2015-05-08 17:00:10 -0700641 // Just strip any sequence of whitespace or java space characters from the beginning and end
642 Matcher m = sTrimPattern.matcher(s);
643 return m.replaceAll("$1");
644 }
Sunny Goyal70660032015-05-14 00:07:08 -0700645
Winson Chung2c6e5cc2015-06-01 14:38:24 -0700646 /**
647 * Calculates the height of a given string at a specific text size.
648 */
649 public static float calculateTextHeight(float textSizePx) {
650 Paint p = new Paint();
651 p.setTextSize(textSizePx);
652 Paint.FontMetrics fm = p.getFontMetrics();
653 return -fm.top + fm.bottom;
654 }
655
Winson Chungb1777442015-06-16 13:35:04 -0700656 /**
657 * Convenience println with multiple args.
658 */
659 public static void println(String key, Object... args) {
660 StringBuilder b = new StringBuilder();
661 b.append(key);
662 b.append(": ");
663 boolean isFirstArgument = true;
664 for (Object arg : args) {
665 if (isFirstArgument) {
666 isFirstArgument = false;
667 } else {
668 b.append(", ");
669 }
670 b.append(arg);
671 }
672 System.out.println(b.toString());
673 }
674
Sunny Goyal70660032015-05-14 00:07:08 -0700675 @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
676 public static boolean isRtl(Resources res) {
Sunny Goyal9fc953b2015-08-17 12:24:25 -0700677 return ATLEAST_JB_MR1 &&
Sunny Goyal70660032015-05-14 00:07:08 -0700678 (res.getConfiguration().getLayoutDirection() == View.LAYOUT_DIRECTION_RTL);
679 }
Hyunyoung Song2bd3d7d2015-05-21 13:04:53 -0700680
681 public static void assertWorkerThread() {
Sunny Goyal6c56c682015-07-16 14:09:05 -0700682 if (ProviderConfig.IS_DOGFOOD_BUILD &&
Sunny Goyal11d49112015-06-26 14:00:57 -0700683 (LauncherModel.sWorkerThread.getThreadId() != Process.myTid())) {
684 throw new IllegalStateException();
Hyunyoung Song2bd3d7d2015-05-21 13:04:53 -0700685 }
686 }
Sunny Goyal5c97f512015-05-19 16:03:28 -0700687
688 /**
689 * Returns true if the intent is a valid launch intent for a launcher activity of an app.
690 * This is used to identify shortcuts which are different from the ones exposed by the
691 * applications' manifest file.
692 *
693 * @param launchIntent The intent that will be launched when the shortcut is clicked.
694 */
695 public static boolean isLauncherAppTarget(Intent launchIntent) {
Sunny Goyal4e5cc642015-06-25 16:37:44 -0700696 if (launchIntent != null
Sunny Goyal5c97f512015-05-19 16:03:28 -0700697 && Intent.ACTION_MAIN.equals(launchIntent.getAction())
698 && launchIntent.getComponent() != null
699 && launchIntent.getCategories() != null
700 && launchIntent.getCategories().size() == 1
701 && launchIntent.hasCategory(Intent.CATEGORY_LAUNCHER)
Sunny Goyal4e5cc642015-06-25 16:37:44 -0700702 && TextUtils.isEmpty(launchIntent.getDataString())) {
703 // An app target can either have no extra or have ItemInfo.EXTRA_PROFILE.
704 Bundle extras = launchIntent.getExtras();
705 if (extras == null) {
706 return true;
707 } else {
708 Set<String> keys = extras.keySet();
709 return keys.size() == 1 && keys.contains(ItemInfo.EXTRA_PROFILE);
710 }
711 };
712 return false;
Sunny Goyal5c97f512015-05-19 16:03:28 -0700713 }
Adam Cohen2e6da152015-05-06 11:42:25 -0700714
715 public static float dpiFromPx(int size, DisplayMetrics metrics){
716 float densityRatio = (float) metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT;
717 return (size / densityRatio);
718 }
719 public static int pxFromDp(float size, DisplayMetrics metrics) {
720 return (int) Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
721 size, metrics));
722 }
723 public static int pxFromSp(float size, DisplayMetrics metrics) {
724 return (int) Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,
725 size, metrics));
726 }
Sunny Goyalb1622cc2015-06-10 16:00:42 -0700727
728 public static String createDbSelectionQuery(String columnName, Iterable<?> values) {
729 return String.format(Locale.ENGLISH, "%s IN (%s)", columnName, TextUtils.join(", ", values));
730 }
Sunny Goyal25aba0a2015-07-16 15:07:47 -0700731
732 @SuppressWarnings({"unchecked", "rawtypes"})
733 public static boolean isBootCompleted() {
734 try {
735 Class clazz = Class.forName("android.os.SystemProperties");
736 Method getter = clazz.getDeclaredMethod("get", String.class);
737 String value = (String) getter.invoke(null, "sys.boot_completed");
738 return "1".equals(value);
739 } catch (Exception e) {
740 Log.d(TAG, "Unable to read system properties");
741 // Assume that boot has completed
742 return true;
743 }
744 }
Tony Wickham29d853c2015-09-08 10:35:56 -0700745
746 /**
747 * Ensures that a value is within given bounds. Specifically:
748 * If value is less than lowerBound, return lowerBound; else if value is greater than upperBound,
749 * return upperBound; else return value unchanged.
750 */
751 public static int boundInRange(int value, int lowerBound, int upperBound) {
752 return Math.max(lowerBound, Math.min(value, upperBound));
753 }
The Android Open Source Project31dd5032009-03-03 19:32:27 -0800754}