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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;
Sunny Goyalc5c60ad2014-07-14 12:02:01 -070028import android.content.pm.ApplicationInfo;
29import android.content.pm.PackageInfo;
30import android.content.pm.PackageManager;
31import android.content.pm.PackageManager.NameNotFoundException;
32import android.content.pm.ResolveInfo;
Winson Chungaafa03c2010-06-11 17:34:16 -070033import android.content.res.Resources;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080034import android.graphics.Bitmap;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080035import android.graphics.Canvas;
Sunny Goyal95abbb32014-08-04 10:53:22 -070036import android.graphics.Color;
Winson Chungc763c4e2013-07-19 13:49:06 -070037import android.graphics.Matrix;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080038import android.graphics.Paint;
Joe Onoratobf15cb42009-08-07 14:33:40 -070039import android.graphics.PaintFlagsDrawFilter;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080040import android.graphics.Rect;
Winson Chungaafa03c2010-06-11 17:34:16 -070041import android.graphics.drawable.BitmapDrawable;
42import android.graphics.drawable.Drawable;
43import android.graphics.drawable.PaintDrawable;
Sandeep Siddhartha2efc7d92014-05-16 17:21:15 -070044import android.os.Build;
Michael Jurkaa805e1a2013-08-22 15:00:33 +020045import android.util.Log;
Sunny Goyal0fe505b2014-08-06 09:55:36 -070046import android.util.Pair;
Sunny Goyal95abbb32014-08-04 10:53:22 -070047import android.util.SparseArray;
Winson Chungc763c4e2013-07-19 13:49:06 -070048import android.view.View;
Michael Jurkaa805e1a2013-08-22 15:00:33 +020049import android.widget.Toast;
Winson Chungc763c4e2013-07-19 13:49:06 -070050
51import java.util.ArrayList;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080052
53/**
54 * Various utilities shared amongst the Launcher's classes.
55 */
Mathew Inwood72fbec12013-11-19 15:45:07 +000056public final class Utilities {
Joe Onorato1291a8c2009-09-15 15:07:25 -040057 private static final String TAG = "Launcher.Utilities";
58
The Android Open Source Project31dd5032009-03-03 19:32:27 -080059 private static int sIconWidth = -1;
60 private static int sIconHeight = -1;
61
The Android Open Source Project31dd5032009-03-03 19:32:27 -080062 private static final Rect sOldBounds = new Rect();
Romain Guy89911d22009-09-28 18:48:49 -070063 private static final Canvas sCanvas = new Canvas();
The Android Open Source Project31dd5032009-03-03 19:32:27 -080064
65 static {
66 sCanvas.setDrawFilter(new PaintFlagsDrawFilter(Paint.DITHER_FLAG,
67 Paint.FILTER_BITMAP_FLAG));
68 }
Joe Onorato6665c0f2009-09-02 15:27:24 -070069 static int sColors[] = { 0xffff0000, 0xff00ff00, 0xff0000ff };
70 static int sColorIndex = 0;
71
Adam Cohen63f1ec02014-08-12 09:23:13 -070072 static int[] sLoc0 = new int[2];
73 static int[] sLoc1 = new int[2];
Michael Jurka7ad868b2013-12-12 15:04:25 +010074
75 // To turn on these properties, type
76 // adb shell setprop log.tag.PROPERTY_NAME [VERBOSE | SUPPRESS]
77 static final String FORCE_ENABLE_ROTATION_PROPERTY = "launcher_force_rotate";
78 public static boolean sForceEnableRotation = isPropertyEnabled(FORCE_ENABLE_ROTATION_PROPERTY);
79
Joe Onorato6665c0f2009-09-02 15:27:24 -070080 /**
Winson Chung0dbd7342013-10-13 22:46:20 -070081 * Returns a FastBitmapDrawable with the icon, accurately sized.
82 */
Sunny Goyalffe83f12014-08-14 17:39:34 -070083 public static FastBitmapDrawable createIconDrawable(Bitmap icon) {
Winson Chung0dbd7342013-10-13 22:46:20 -070084 FastBitmapDrawable d = new FastBitmapDrawable(icon);
Winson Chung54000492013-10-14 16:29:29 -070085 d.setFilterBitmap(true);
Winson Chung0dbd7342013-10-13 22:46:20 -070086 resizeIconDrawable(d);
87 return d;
88 }
89
90 /**
91 * Resizes an icon drawable to the correct icon size.
92 */
93 static void resizeIconDrawable(Drawable icon) {
Sunny Goyal2fce90c2014-10-07 12:01:58 -070094 icon.setBounds(0, 0, sIconWidth, sIconHeight);
Winson Chung0dbd7342013-10-13 22:46:20 -070095 }
96
Sunny Goyal4bbf4192014-11-11 12:23:59 -080097 public static boolean isPropertyEnabled(String propertyName) {
Michael Jurka7ad868b2013-12-12 15:04:25 +010098 return Log.isLoggable(propertyName, Log.VERBOSE);
99 }
100
101 public static boolean isRotationEnabled(Context c) {
102 boolean enableRotation = sForceEnableRotation ||
103 c.getResources().getBoolean(R.bool.allow_rotation);
104 return enableRotation;
105 }
106
Winson Chung0dbd7342013-10-13 22:46:20 -0700107 /**
Kenny Guyd794a3f2014-09-16 15:17:58 +0100108 * Indicates if the device is running LMP or higher.
Sandeep Siddhartha2efc7d92014-05-16 17:21:15 -0700109 */
Kenny Guyd794a3f2014-09-16 15:17:58 +0100110 public static boolean isLmpOrAbove() {
Brian Parfett1bc1ae62014-12-12 12:30:00 -0800111 return Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP;
Sandeep Siddhartha2efc7d92014-05-16 17:21:15 -0700112 }
113
114 /**
Sunny Goyalb50cc8c2014-10-06 16:23:56 -0700115 * Returns a bitmap suitable for the all apps view. If the package or the resource do not
116 * exist, it returns null.
117 */
118 static Bitmap createIconBitmap(String packageName, String resourceName, IconCache cache,
119 Context context) {
120 PackageManager packageManager = context.getPackageManager();
121 // the resource
122 try {
123 Resources resources = packageManager.getResourcesForApplication(packageName);
124 if (resources != null) {
125 final int id = resources.getIdentifier(resourceName, null, null);
126 return createIconBitmap(
127 resources.getDrawableForDensity(id, cache.getFullResIconDpi()), context);
128 }
129 } catch (Exception e) {
130 // Icon not found.
131 }
132 return null;
133 }
134
135 /**
Sunny Goyal2fce90c2014-10-07 12:01:58 -0700136 * Returns a bitmap which is of the appropriate size to be displayed as an icon
Michael Jurka931dc972011-08-05 15:08:15 -0700137 */
138 static Bitmap createIconBitmap(Bitmap icon, Context context) {
Sunny Goyal2fce90c2014-10-07 12:01:58 -0700139 synchronized (sCanvas) { // we share the statics :-(
140 if (sIconWidth == -1) {
141 initStatics(context);
142 }
Michael Jurka931dc972011-08-05 15:08:15 -0700143 }
Sunny Goyal2fce90c2014-10-07 12:01:58 -0700144 if (sIconWidth == icon.getWidth() && sIconHeight == icon.getHeight()) {
145 return icon;
146 }
147 return createIconBitmap(new BitmapDrawable(context.getResources(), icon), context);
Michael Jurka931dc972011-08-05 15:08:15 -0700148 }
149
150 /**
151 * Returns a bitmap suitable for the all apps view.
Joe Onorato6665c0f2009-09-02 15:27:24 -0700152 */
Mathew Inwood72fbec12013-11-19 15:45:07 +0000153 public static Bitmap createIconBitmap(Drawable icon, Context context) {
Joe Onorato6665c0f2009-09-02 15:27:24 -0700154 synchronized (sCanvas) { // we share the statics :-(
155 if (sIconWidth == -1) {
156 initStatics(context);
157 }
158
159 int width = sIconWidth;
160 int height = sIconHeight;
161
Joe Onorato6665c0f2009-09-02 15:27:24 -0700162 if (icon instanceof PaintDrawable) {
163 PaintDrawable painter = (PaintDrawable) icon;
164 painter.setIntrinsicWidth(width);
165 painter.setIntrinsicHeight(height);
166 } else if (icon instanceof BitmapDrawable) {
167 // Ensure the bitmap has a density.
168 BitmapDrawable bitmapDrawable = (BitmapDrawable) icon;
169 Bitmap bitmap = bitmapDrawable.getBitmap();
170 if (bitmap.getDensity() == Bitmap.DENSITY_NONE) {
171 bitmapDrawable.setTargetDensity(context.getResources().getDisplayMetrics());
172 }
173 }
174 int sourceWidth = icon.getIntrinsicWidth();
175 int sourceHeight = icon.getIntrinsicHeight();
Michael Jurka931dc972011-08-05 15:08:15 -0700176 if (sourceWidth > 0 && sourceHeight > 0) {
Winson Chung5f8afe62013-08-12 16:19:28 -0700177 // Scale the icon proportionally to the icon dimensions
178 final float ratio = (float) sourceWidth / sourceHeight;
179 if (sourceWidth > sourceHeight) {
180 height = (int) (width / ratio);
181 } else if (sourceHeight > sourceWidth) {
182 width = (int) (height * ratio);
Joe Onorato6665c0f2009-09-02 15:27:24 -0700183 }
184 }
185
186 // no intrinsic size --> use default size
Sunny Goyal2fce90c2014-10-07 12:01:58 -0700187 int textureWidth = sIconWidth;
188 int textureHeight = sIconHeight;
Joe Onorato6665c0f2009-09-02 15:27:24 -0700189
190 final Bitmap bitmap = Bitmap.createBitmap(textureWidth, textureHeight,
191 Bitmap.Config.ARGB_8888);
192 final Canvas canvas = sCanvas;
193 canvas.setBitmap(bitmap);
194
195 final int left = (textureWidth-width) / 2;
196 final int top = (textureHeight-height) / 2;
197
Michael Jurka3a9fced2012-04-13 14:44:29 -0700198 @SuppressWarnings("all") // suppress dead code warning
199 final boolean debug = false;
200 if (debug) {
Joe Onorato6665c0f2009-09-02 15:27:24 -0700201 // draw a big box for the icon for debugging
202 canvas.drawColor(sColors[sColorIndex]);
203 if (++sColorIndex >= sColors.length) sColorIndex = 0;
204 Paint debugPaint = new Paint();
205 debugPaint.setColor(0xffcccc00);
206 canvas.drawRect(left, top, left+width, top+height, debugPaint);
207 }
208
209 sOldBounds.set(icon.getBounds());
210 icon.setBounds(left, top, left+width, top+height);
211 icon.draw(canvas);
212 icon.setBounds(sOldBounds);
Adam Cohenaaf473c2011-08-03 12:02:47 -0700213 canvas.setBitmap(null);
Joe Onorato6665c0f2009-09-02 15:27:24 -0700214
215 return bitmap;
216 }
217 }
218
The Android Open Source Project31dd5032009-03-03 19:32:27 -0800219 /**
Winson Chungc763c4e2013-07-19 13:49:06 -0700220 * Given a coordinate relative to the descendant, find the coordinate in a parent view's
221 * coordinates.
222 *
223 * @param descendant The descendant to which the passed coordinate is relative.
224 * @param root The root view to make the coordinates relative to.
225 * @param coord The coordinate that we want mapped.
226 * @param includeRootScroll Whether or not to account for the scroll of the descendant:
227 * sometimes this is relevant as in a child's coordinates within the descendant.
228 * @return The factor by which this descendant is scaled relative to this DragLayer. Caution
229 * this scale factor is assumed to be equal in X and Y, and so if at any point this
230 * assumption fails, we will need to return a pair of scale factors.
231 */
232 public static float getDescendantCoordRelativeToParent(View descendant, View root,
233 int[] coord, boolean includeRootScroll) {
234 ArrayList<View> ancestorChain = new ArrayList<View>();
235
236 float[] pt = {coord[0], coord[1]};
237
238 View v = descendant;
239 while(v != root && v != null) {
240 ancestorChain.add(v);
241 v = (View) v.getParent();
242 }
243 ancestorChain.add(root);
244
245 float scale = 1.0f;
246 int count = ancestorChain.size();
247 for (int i = 0; i < count; i++) {
248 View v0 = ancestorChain.get(i);
Winson Chungc763c4e2013-07-19 13:49:06 -0700249 // For TextViews, scroll has a meaning which relates to the text position
250 // which is very strange... ignore the scroll.
251 if (v0 != descendant || includeRootScroll) {
252 pt[0] -= v0.getScrollX();
253 pt[1] -= v0.getScrollY();
254 }
255
256 v0.getMatrix().mapPoints(pt);
257 pt[0] += v0.getLeft();
258 pt[1] += v0.getTop();
259 scale *= v0.getScaleX();
260 }
261
262 coord[0] = (int) Math.round(pt[0]);
263 coord[1] = (int) Math.round(pt[1]);
264 return scale;
265 }
266
267 /**
268 * Inverse of {@link #getDescendantCoordRelativeToSelf(View, int[])}.
269 */
270 public static float mapCoordInSelfToDescendent(View descendant, View root,
271 int[] coord) {
272 ArrayList<View> ancestorChain = new ArrayList<View>();
273
274 float[] pt = {coord[0], coord[1]};
275
276 View v = descendant;
277 while(v != root) {
278 ancestorChain.add(v);
279 v = (View) v.getParent();
280 }
281 ancestorChain.add(root);
282
283 float scale = 1.0f;
284 Matrix inverse = new Matrix();
285 int count = ancestorChain.size();
286 for (int i = count - 1; i >= 0; i--) {
287 View ancestor = ancestorChain.get(i);
288 View next = i > 0 ? ancestorChain.get(i-1) : null;
289
290 pt[0] += ancestor.getScrollX();
291 pt[1] += ancestor.getScrollY();
292
293 if (next != null) {
294 pt[0] -= next.getLeft();
295 pt[1] -= next.getTop();
296 next.getMatrix().invert(inverse);
297 inverse.mapPoints(pt);
298 scale *= next.getScaleX();
299 }
300 }
301
302 coord[0] = (int) Math.round(pt[0]);
303 coord[1] = (int) Math.round(pt[1]);
304 return scale;
305 }
306
Jason Monk02dd7ae2014-04-15 15:23:31 -0400307 /**
308 * Utility method to determine whether the given point, in local coordinates,
309 * is inside the view, where the area of the view is expanded by the slop factor.
310 * This method is called while processing touch-move events to determine if the event
311 * is still within the view.
312 */
313 public static boolean pointInView(View v, float localX, float localY, float slop) {
314 return localX >= -slop && localY >= -slop && localX < (v.getWidth() + slop) &&
315 localY < (v.getHeight() + slop);
316 }
317
Joe Onorato6665c0f2009-09-02 15:27:24 -0700318 private static void initStatics(Context context) {
319 final Resources resources = context.getResources();
Michael Jurkac9a96192010-11-01 11:52:08 -0700320 sIconWidth = sIconHeight = (int) resources.getDimension(R.dimen.app_icon_size);
Joe Onorato6665c0f2009-09-02 15:27:24 -0700321 }
322
Winson Chung5f8afe62013-08-12 16:19:28 -0700323 public static void setIconSize(int widthPx) {
324 sIconWidth = sIconHeight = widthPx;
Winson Chung97d85d22011-04-13 11:27:36 -0700325 }
Michael Jurkaa805e1a2013-08-22 15:00:33 +0200326
Winson Chung3a6e7f32013-10-09 15:50:52 -0700327 public static void scaleRect(Rect r, float scale) {
328 if (scale != 1.0f) {
329 r.left = (int) (r.left * scale + 0.5f);
330 r.top = (int) (r.top * scale + 0.5f);
331 r.right = (int) (r.right * scale + 0.5f);
332 r.bottom = (int) (r.bottom * scale + 0.5f);
333 }
334 }
335
Adam Cohen63f1ec02014-08-12 09:23:13 -0700336 public static int[] getCenterDeltaInScreenSpace(View v0, View v1, int[] delta) {
337 v0.getLocationInWindow(sLoc0);
338 v1.getLocationInWindow(sLoc1);
339
340 sLoc0[0] += (v0.getMeasuredWidth() * v0.getScaleX()) / 2;
341 sLoc0[1] += (v0.getMeasuredHeight() * v0.getScaleY()) / 2;
342 sLoc1[0] += (v1.getMeasuredWidth() * v1.getScaleX()) / 2;
343 sLoc1[1] += (v1.getMeasuredHeight() * v1.getScaleY()) / 2;
344
345 if (delta == null) {
346 delta = new int[2];
347 }
348
349 delta[0] = sLoc1[0] - sLoc0[0];
350 delta[1] = sLoc1[1] - sLoc0[1];
351
352 return delta;
353 }
354
Winson Chung3a6e7f32013-10-09 15:50:52 -0700355 public static void scaleRectAboutCenter(Rect r, float scale) {
356 int cx = r.centerX();
357 int cy = r.centerY();
358 r.offset(-cx, -cy);
359 Utilities.scaleRect(r, scale);
360 r.offset(cx, cy);
361 }
362
Michael Jurkaa805e1a2013-08-22 15:00:33 +0200363 public static void startActivityForResultSafely(
364 Activity activity, Intent intent, int requestCode) {
365 try {
366 activity.startActivityForResult(intent, requestCode);
367 } catch (ActivityNotFoundException e) {
368 Toast.makeText(activity, R.string.activity_not_found, Toast.LENGTH_SHORT).show();
369 } catch (SecurityException e) {
370 Toast.makeText(activity, R.string.activity_not_found, Toast.LENGTH_SHORT).show();
371 Log.e(TAG, "Launcher does not have the permission to launch " + intent +
372 ". Make sure to create a MAIN intent-filter for the corresponding activity " +
373 "or use the exported attribute for this activity.", e);
374 }
375 }
Sunny Goyalc5c60ad2014-07-14 12:02:01 -0700376
377 static boolean isSystemApp(Context context, Intent intent) {
378 PackageManager pm = context.getPackageManager();
379 ComponentName cn = intent.getComponent();
380 String packageName = null;
381 if (cn == null) {
382 ResolveInfo info = pm.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
383 if ((info != null) && (info.activityInfo != null)) {
384 packageName = info.activityInfo.packageName;
385 }
386 } else {
387 packageName = cn.getPackageName();
388 }
389 if (packageName != null) {
390 try {
391 PackageInfo info = pm.getPackageInfo(packageName, 0);
392 return (info != null) && (info.applicationInfo != null) &&
393 ((info.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0);
394 } catch (NameNotFoundException e) {
395 return false;
396 }
397 } else {
398 return false;
399 }
400 }
Sunny Goyal95abbb32014-08-04 10:53:22 -0700401
402 /**
403 * This picks a dominant color, looking for high-saturation, high-value, repeated hues.
404 * @param bitmap The bitmap to scan
405 * @param samples The approximate max number of samples to use.
406 */
407 static int findDominantColorByHue(Bitmap bitmap, int samples) {
408 final int height = bitmap.getHeight();
409 final int width = bitmap.getWidth();
410 int sampleStride = (int) Math.sqrt((height * width) / samples);
411 if (sampleStride < 1) {
412 sampleStride = 1;
413 }
414
415 // This is an out-param, for getting the hsv values for an rgb
416 float[] hsv = new float[3];
417
418 // First get the best hue, by creating a histogram over 360 hue buckets,
419 // where each pixel contributes a score weighted by saturation, value, and alpha.
420 float[] hueScoreHistogram = new float[360];
421 float highScore = -1;
422 int bestHue = -1;
423
424 for (int y = 0; y < height; y += sampleStride) {
425 for (int x = 0; x < width; x += sampleStride) {
426 int argb = bitmap.getPixel(x, y);
427 int alpha = 0xFF & (argb >> 24);
428 if (alpha < 0x80) {
429 // Drop mostly-transparent pixels.
430 continue;
431 }
432 // Remove the alpha channel.
433 int rgb = argb | 0xFF000000;
434 Color.colorToHSV(rgb, hsv);
435 // Bucket colors by the 360 integer hues.
436 int hue = (int) hsv[0];
437 if (hue < 0 || hue >= hueScoreHistogram.length) {
438 // Defensively avoid array bounds violations.
439 continue;
440 }
441 float score = hsv[1] * hsv[2];
442 hueScoreHistogram[hue] += score;
443 if (hueScoreHistogram[hue] > highScore) {
444 highScore = hueScoreHistogram[hue];
445 bestHue = hue;
446 }
447 }
448 }
449
450 SparseArray<Float> rgbScores = new SparseArray<Float>();
451 int bestColor = 0xff000000;
452 highScore = -1;
453 // Go back over the RGB colors that match the winning hue,
454 // creating a histogram of weighted s*v scores, for up to 100*100 [s,v] buckets.
455 // The highest-scoring RGB color wins.
456 for (int y = 0; y < height; y += sampleStride) {
457 for (int x = 0; x < width; x += sampleStride) {
458 int rgb = bitmap.getPixel(x, y) | 0xff000000;
459 Color.colorToHSV(rgb, hsv);
460 int hue = (int) hsv[0];
461 if (hue == bestHue) {
462 float s = hsv[1];
463 float v = hsv[2];
464 int bucket = (int) (s * 100) + (int) (v * 10000);
465 // Score by cumulative saturation * value.
466 float score = s * v;
467 Float oldTotal = rgbScores.get(bucket);
468 float newTotal = oldTotal == null ? score : oldTotal + score;
469 rgbScores.put(bucket, newTotal);
470 if (newTotal > highScore) {
471 highScore = newTotal;
472 // All the colors in the winning bucket are very similar. Last in wins.
473 bestColor = rgb;
474 }
475 }
476 }
477 }
478 return bestColor;
479 }
Sunny Goyal0fe505b2014-08-06 09:55:36 -0700480
481 /*
482 * Finds a system apk which had a broadcast receiver listening to a particular action.
483 * @param action intent action used to find the apk
484 * @return a pair of apk package name and the resources.
485 */
486 static Pair<String, Resources> findSystemApk(String action, PackageManager pm) {
487 final Intent intent = new Intent(action);
488 for (ResolveInfo info : pm.queryBroadcastReceivers(intent, 0)) {
489 if (info.activityInfo != null &&
490 (info.activityInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
491 final String packageName = info.activityInfo.packageName;
492 try {
493 final Resources res = pm.getResourcesForApplication(packageName);
494 return Pair.create(packageName, res);
495 } catch (NameNotFoundException e) {
496 Log.w(TAG, "Failed to find resources for " + packageName);
497 }
498 }
499 }
500 return null;
501 }
Sunny Goyalfafca522014-11-03 11:30:01 -0800502
503 @TargetApi(Build.VERSION_CODES.KITKAT)
504 public static boolean isViewAttachedToWindow(View v) {
505 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
506 return v.isAttachedToWindow();
507 } else {
508 // A proxy call which returns null, if the view is not attached to the window.
509 return v.getKeyDispatcherState() != null;
510 }
511 }
Sunny Goyal594d76d2014-11-06 10:12:54 -0800512
513 /**
514 * Returns a widget with category {@link AppWidgetProviderInfo#WIDGET_CATEGORY_SEARCHBOX}
515 * provided by the same package which is set to be global search activity.
516 * If widgetCategory is not supported, or no such widget is found, returns the first widget
517 * provided by the package.
518 */
519 @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
520 public static AppWidgetProviderInfo getSearchWidgetProvider(Context context) {
521 SearchManager searchManager =
522 (SearchManager) context.getSystemService(Context.SEARCH_SERVICE);
523 ComponentName searchComponent = searchManager.getGlobalSearchActivity();
524 if (searchComponent == null) return null;
525 String providerPkg = searchComponent.getPackageName();
526
527 AppWidgetProviderInfo defaultWidgetForSearchPackage = null;
528
529 AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
530 for (AppWidgetProviderInfo info : appWidgetManager.getInstalledProviders()) {
531 if (info.provider.getPackageName().equals(providerPkg)) {
532 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
533 if ((info.widgetCategory & AppWidgetProviderInfo.WIDGET_CATEGORY_SEARCHBOX) != 0) {
534 return info;
535 } else if (defaultWidgetForSearchPackage == null) {
536 defaultWidgetForSearchPackage = info;
537 }
538 } else {
539 return info;
540 }
541 }
542 }
543 return defaultWidgetForSearchPackage;
544 }
The Android Open Source Project31dd5032009-03-03 19:32:27 -0800545}