1/*
2 * Copyright (C) 2011 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
17package com.android.systemui.screenshot;
18
19import android.animation.Animator;
20import android.animation.AnimatorListenerAdapter;
21import android.animation.AnimatorSet;
22import android.animation.ValueAnimator;
23import android.animation.ValueAnimator.AnimatorUpdateListener;
24import android.app.Notification;
25import android.app.NotificationManager;
26import android.app.PendingIntent;
27import android.content.ContentResolver;
28import android.content.ContentValues;
29import android.content.Context;
30import android.content.Intent;
31import android.content.res.Resources;
32import android.graphics.Bitmap;
33import android.graphics.Canvas;
34import android.graphics.Matrix;
35import android.graphics.PixelFormat;
36import android.graphics.PointF;
37import android.hardware.CameraSound;
38import android.net.Uri;
39import android.os.AsyncTask;
40import android.os.Environment;
41import android.os.Process;
42import android.provider.MediaStore;
43import android.util.DisplayMetrics;
44import android.view.Display;
45import android.view.LayoutInflater;
46import android.view.MotionEvent;
47import android.view.Surface;
48import android.view.View;
49import android.view.ViewGroup;
50import android.view.WindowManager;
51import android.view.animation.Interpolator;
52import android.widget.ImageView;
53
54import com.android.systemui.R;
55
56import java.io.File;
57import java.io.OutputStream;
58import java.text.SimpleDateFormat;
59import java.util.Date;
60
61/**
62 * POD used in the AsyncTask which saves an image in the background.
63 */
64class SaveImageInBackgroundData {
65    Context context;
66    Bitmap image;
67    Uri imageUri;
68    Runnable finisher;
69    int iconSize;
70    int result;
71}
72
73/**
74 * An AsyncTask that saves an image to the media store in the background.
75 */
76class SaveImageInBackgroundTask extends AsyncTask<SaveImageInBackgroundData, Void,
77        SaveImageInBackgroundData> {
78    private static final String SCREENSHOTS_DIR_NAME = "Screenshots";
79    private static final String SCREENSHOT_FILE_NAME_TEMPLATE = "Screenshot_%s.png";
80    private static final String SCREENSHOT_FILE_PATH_TEMPLATE = "%s/%s/%s";
81
82    private int mNotificationId;
83    private NotificationManager mNotificationManager;
84    private Notification.Builder mNotificationBuilder;
85    private String mImageFileName;
86    private String mImageFilePath;
87    private long mImageTime;
88
89    // WORKAROUND: We want the same notification across screenshots that we update so that we don't
90    // spam a user's notification drawer.  However, we only show the ticker for the saving state
91    // and if the ticker text is the same as the previous notification, then it will not show. So
92    // for now, we just add and remove a space from the ticker text to trigger the animation when
93    // necessary.
94    private static boolean mTickerAddSpace;
95
96    SaveImageInBackgroundTask(Context context, SaveImageInBackgroundData data,
97            NotificationManager nManager, int nId) {
98        Resources r = context.getResources();
99
100        // Prepare all the output metadata
101        mImageTime = System.currentTimeMillis();
102        String imageDate = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss").format(new Date(mImageTime));
103        String imageDir = Environment.getExternalStoragePublicDirectory(
104                Environment.DIRECTORY_PICTURES).getAbsolutePath();
105        mImageFileName = String.format(SCREENSHOT_FILE_NAME_TEMPLATE, imageDate);
106        mImageFilePath = String.format(SCREENSHOT_FILE_PATH_TEMPLATE, imageDir,
107                SCREENSHOTS_DIR_NAME, mImageFileName);
108
109        // Create the large notification icon
110        int imageWidth = data.image.getWidth();
111        int imageHeight = data.image.getHeight();
112        int iconWidth = data.iconSize;
113        int iconHeight = data.iconSize;
114        if (imageWidth > imageHeight) {
115            iconWidth = (int) (((float) iconHeight / imageHeight) * imageWidth);
116        } else {
117            iconHeight = (int) (((float) iconWidth / imageWidth) * imageHeight);
118        }
119        Bitmap rawIcon = Bitmap.createScaledBitmap(data.image, iconWidth, iconHeight, true);
120        Bitmap croppedIcon = Bitmap.createBitmap(rawIcon, (iconWidth - data.iconSize) / 2,
121                (iconHeight - data.iconSize) / 2, data.iconSize, data.iconSize);
122
123        // Show the intermediate notification
124        mTickerAddSpace = !mTickerAddSpace;
125        mNotificationId = nId;
126        mNotificationManager = nManager;
127        mNotificationBuilder = new Notification.Builder(context)
128            .setTicker(r.getString(R.string.screenshot_saving_ticker)
129                    + (mTickerAddSpace ? " " : ""))
130            .setContentTitle(r.getString(R.string.screenshot_saving_title))
131            .setContentText(r.getString(R.string.screenshot_saving_text))
132            .setSmallIcon(R.drawable.stat_notify_image)
133            .setWhen(System.currentTimeMillis());
134        Notification n = mNotificationBuilder.getNotification();
135        n.flags |= Notification.FLAG_NO_CLEAR;
136        mNotificationManager.notify(nId, n);
137
138        // On the tablet, the large icon makes the notification appear as if it is clickable (and
139        // on small devices, the large icon is not shown) so defer showing the large icon until
140        // we compose the final post-save notification below.
141        mNotificationBuilder.setLargeIcon(croppedIcon);
142    }
143
144    @Override
145    protected SaveImageInBackgroundData doInBackground(SaveImageInBackgroundData... params) {
146        if (params.length != 1) return null;
147
148        // By default, AsyncTask sets the worker thread to have background thread priority, so bump
149        // it back up so that we save a little quicker.
150        Process.setThreadPriority(Process.THREAD_PRIORITY_FOREGROUND);
151
152        Context context = params[0].context;
153        Bitmap image = params[0].image;
154
155        try {
156            // Save the screenshot to the MediaStore
157            ContentValues values = new ContentValues();
158            ContentResolver resolver = context.getContentResolver();
159            values.put(MediaStore.Images.ImageColumns.DATA, mImageFilePath);
160            values.put(MediaStore.Images.ImageColumns.TITLE, mImageFileName);
161            values.put(MediaStore.Images.ImageColumns.DISPLAY_NAME, mImageFileName);
162            values.put(MediaStore.Images.ImageColumns.DATE_TAKEN, mImageTime);
163            values.put(MediaStore.Images.ImageColumns.DATE_ADDED, mImageTime);
164            values.put(MediaStore.Images.ImageColumns.DATE_MODIFIED, mImageTime);
165            values.put(MediaStore.Images.ImageColumns.MIME_TYPE, "image/png");
166            Uri uri = resolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
167
168            OutputStream out = resolver.openOutputStream(uri);
169            image.compress(Bitmap.CompressFormat.PNG, 100, out);
170            out.flush();
171            out.close();
172
173            // update file size in the database
174            values.clear();
175            values.put(MediaStore.Images.ImageColumns.SIZE, new File(mImageFilePath).length());
176            resolver.update(uri, values, null, null);
177
178            params[0].imageUri = uri;
179            params[0].result = 0;
180        } catch (Exception e) {
181            // IOException/UnsupportedOperationException may be thrown if external storage is not
182            // mounted
183            params[0].result = 1;
184        }
185
186        return params[0];
187    }
188
189    @Override
190    protected void onPostExecute(SaveImageInBackgroundData params) {
191        if (params.result > 0) {
192            // Show a message that we've failed to save the image to disk
193            GlobalScreenshot.notifyScreenshotError(params.context, mNotificationManager);
194        } else {
195            // Show the final notification to indicate screenshot saved
196            Resources r = params.context.getResources();
197
198            // Create the intent to show the screenshot in gallery
199            Intent launchIntent = new Intent(Intent.ACTION_VIEW);
200            launchIntent.setDataAndType(params.imageUri, "image/png");
201            launchIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
202
203            mNotificationBuilder
204                .setContentTitle(r.getString(R.string.screenshot_saved_title))
205                .setContentText(r.getString(R.string.screenshot_saved_text))
206                .setContentIntent(PendingIntent.getActivity(params.context, 0, launchIntent, 0))
207                .setWhen(System.currentTimeMillis())
208                .setAutoCancel(true);
209
210            Notification n = mNotificationBuilder.getNotification();
211            n.flags &= ~Notification.FLAG_NO_CLEAR;
212            mNotificationManager.notify(mNotificationId, n);
213        }
214        params.finisher.run();
215    }
216}
217
218/**
219 * TODO:
220 *   - Performance when over gl surfaces? Ie. Gallery
221 *   - what do we say in the Toast? Which icon do we get if the user uses another
222 *     type of gallery?
223 */
224class GlobalScreenshot {
225    private static final int SCREENSHOT_NOTIFICATION_ID = 789;
226    private static final int SCREENSHOT_FLASH_TO_PEAK_DURATION = 130;
227    private static final int SCREENSHOT_DROP_IN_DURATION = 430;
228    private static final int SCREENSHOT_DROP_OUT_DELAY = 500;
229    private static final int SCREENSHOT_DROP_OUT_DURATION = 430;
230    private static final int SCREENSHOT_DROP_OUT_SCALE_DURATION = 370;
231    private static final int SCREENSHOT_FAST_DROP_OUT_DURATION = 320;
232    private static final float BACKGROUND_ALPHA = 0.5f;
233    private static final float SCREENSHOT_SCALE = 1f;
234    private static final float SCREENSHOT_DROP_IN_MIN_SCALE = SCREENSHOT_SCALE * 0.725f;
235    private static final float SCREENSHOT_DROP_OUT_MIN_SCALE = SCREENSHOT_SCALE * 0.45f;
236    private static final float SCREENSHOT_FAST_DROP_OUT_MIN_SCALE = SCREENSHOT_SCALE * 0.6f;
237    private static final float SCREENSHOT_DROP_OUT_MIN_SCALE_OFFSET = 0f;
238
239    private Context mContext;
240    private WindowManager mWindowManager;
241    private WindowManager.LayoutParams mWindowLayoutParams;
242    private NotificationManager mNotificationManager;
243    private Display mDisplay;
244    private DisplayMetrics mDisplayMetrics;
245    private Matrix mDisplayMatrix;
246
247    private Bitmap mScreenBitmap;
248    private View mScreenshotLayout;
249    private ImageView mBackgroundView;
250    private ImageView mScreenshotView;
251    private ImageView mScreenshotFlash;
252
253    private AnimatorSet mScreenshotAnimation;
254
255    private int mNotificationIconSize;
256    private float mBgPadding;
257    private float mBgPaddingScale;
258
259    private CameraSound mCameraSound;
260
261
262    /**
263     * @param context everything needs a context :(
264     */
265    public GlobalScreenshot(Context context) {
266        Resources r = context.getResources();
267        mContext = context;
268        LayoutInflater layoutInflater = (LayoutInflater)
269                context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
270
271        // Inflate the screenshot layout
272        mDisplayMatrix = new Matrix();
273        mScreenshotLayout = layoutInflater.inflate(R.layout.global_screenshot, null);
274        mBackgroundView = (ImageView) mScreenshotLayout.findViewById(R.id.global_screenshot_background);
275        mScreenshotView = (ImageView) mScreenshotLayout.findViewById(R.id.global_screenshot);
276        mScreenshotFlash = (ImageView) mScreenshotLayout.findViewById(R.id.global_screenshot_flash);
277        mScreenshotLayout.setFocusable(true);
278        mScreenshotLayout.setOnTouchListener(new View.OnTouchListener() {
279            @Override
280            public boolean onTouch(View v, MotionEvent event) {
281                // Intercept and ignore all touch events
282                return true;
283            }
284        });
285
286        // Setup the window that we are going to use
287        mWindowLayoutParams = new WindowManager.LayoutParams(
288                ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT, 0, 0,
289                WindowManager.LayoutParams.TYPE_SECURE_SYSTEM_OVERLAY,
290                WindowManager.LayoutParams.FLAG_FULLSCREEN
291                    | WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED
292                    | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
293                    | WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED,
294                PixelFormat.TRANSLUCENT);
295        mWindowLayoutParams.setTitle("ScreenshotAnimation");
296        mWindowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
297        mNotificationManager =
298            (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
299        mDisplay = mWindowManager.getDefaultDisplay();
300        mDisplayMetrics = new DisplayMetrics();
301        mDisplay.getRealMetrics(mDisplayMetrics);
302
303        // Get the various target sizes
304        mNotificationIconSize =
305            r.getDimensionPixelSize(android.R.dimen.notification_large_icon_height);
306
307        // Scale has to account for both sides of the bg
308        mBgPadding = (float) r.getDimensionPixelSize(R.dimen.global_screenshot_bg_padding);
309        mBgPaddingScale = mBgPadding /  mDisplayMetrics.widthPixels;
310
311        // Setup the Camera shutter sound
312        mCameraSound = new CameraSound();
313    }
314
315    /**
316     * Creates a new worker thread and saves the screenshot to the media store.
317     */
318    private void saveScreenshotInWorkerThread(Runnable finisher) {
319        SaveImageInBackgroundData data = new SaveImageInBackgroundData();
320        data.context = mContext;
321        data.image = mScreenBitmap;
322        data.iconSize = mNotificationIconSize;
323        data.finisher = finisher;
324        new SaveImageInBackgroundTask(mContext, data, mNotificationManager,
325                SCREENSHOT_NOTIFICATION_ID).execute(data);
326    }
327
328    /**
329     * @return the current display rotation in degrees
330     */
331    private float getDegreesForRotation(int value) {
332        switch (value) {
333        case Surface.ROTATION_90:
334            return 360f - 90f;
335        case Surface.ROTATION_180:
336            return 360f - 180f;
337        case Surface.ROTATION_270:
338            return 360f - 270f;
339        }
340        return 0f;
341    }
342
343    /**
344     * Takes a screenshot of the current display and shows an animation.
345     */
346    void takeScreenshot(Runnable finisher, boolean statusBarVisible, boolean navBarVisible) {
347        // We need to orient the screenshot correctly (and the Surface api seems to take screenshots
348        // only in the natural orientation of the device :!)
349        mDisplay.getRealMetrics(mDisplayMetrics);
350        float[] dims = {mDisplayMetrics.widthPixels, mDisplayMetrics.heightPixels};
351        float degrees = getDegreesForRotation(mDisplay.getRotation());
352        boolean requiresRotation = (degrees > 0);
353        if (requiresRotation) {
354            // Get the dimensions of the device in its native orientation
355            mDisplayMatrix.reset();
356            mDisplayMatrix.preRotate(-degrees);
357            mDisplayMatrix.mapPoints(dims);
358            dims[0] = Math.abs(dims[0]);
359            dims[1] = Math.abs(dims[1]);
360        }
361        mScreenBitmap = Surface.screenshot((int) dims[0], (int) dims[1]);
362        if (requiresRotation) {
363            // Rotate the screenshot to the current orientation
364            Bitmap ss = Bitmap.createBitmap(mDisplayMetrics.widthPixels,
365                    mDisplayMetrics.heightPixels, Bitmap.Config.ARGB_8888);
366            Canvas c = new Canvas(ss);
367            c.translate(ss.getWidth() / 2, ss.getHeight() / 2);
368            c.rotate(degrees);
369            c.translate(-dims[0] / 2, -dims[1] / 2);
370            c.drawBitmap(mScreenBitmap, 0, 0, null);
371            c.setBitmap(null);
372            mScreenBitmap = ss;
373        }
374
375        // If we couldn't take the screenshot, notify the user
376        if (mScreenBitmap == null) {
377            notifyScreenshotError(mContext, mNotificationManager);
378            finisher.run();
379            return;
380        }
381
382        // Optimizations
383        mScreenBitmap.setHasAlpha(false);
384        mScreenBitmap.prepareToDraw();
385
386        // Start the post-screenshot animation
387        startAnimation(finisher, mDisplayMetrics.widthPixels, mDisplayMetrics.heightPixels,
388                statusBarVisible, navBarVisible);
389    }
390
391
392    /**
393     * Starts the animation after taking the screenshot
394     */
395    private void startAnimation(final Runnable finisher, int w, int h, boolean statusBarVisible,
396            boolean navBarVisible) {
397        // Add the view for the animation
398        mScreenshotView.setImageBitmap(mScreenBitmap);
399        mScreenshotLayout.requestFocus();
400
401        // Setup the animation with the screenshot just taken
402        if (mScreenshotAnimation != null) {
403            mScreenshotAnimation.end();
404        }
405
406        mWindowManager.addView(mScreenshotLayout, mWindowLayoutParams);
407        ValueAnimator screenshotDropInAnim = createScreenshotDropInAnimation();
408        ValueAnimator screenshotFadeOutAnim = createScreenshotDropOutAnimation(w, h,
409                statusBarVisible, navBarVisible);
410        mScreenshotAnimation = new AnimatorSet();
411        mScreenshotAnimation.playSequentially(screenshotDropInAnim, screenshotFadeOutAnim);
412        mScreenshotAnimation.addListener(new AnimatorListenerAdapter() {
413            @Override
414            public void onAnimationEnd(Animator animation) {
415                // Save the screenshot once we have a bit of time now
416                saveScreenshotInWorkerThread(finisher);
417                mWindowManager.removeView(mScreenshotLayout);
418            }
419        });
420        mScreenshotLayout.post(new Runnable() {
421            @Override
422            public void run() {
423                // Play the shutter sound to notify that we've taken a screenshot
424                mCameraSound.playSound(CameraSound.SHUTTER_CLICK);
425
426                mScreenshotView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
427                mScreenshotView.buildLayer();
428                mScreenshotAnimation.start();
429            }
430        });
431    }
432    private ValueAnimator createScreenshotDropInAnimation() {
433        final float flashPeakDurationPct = ((float) (SCREENSHOT_FLASH_TO_PEAK_DURATION)
434                / SCREENSHOT_DROP_IN_DURATION);
435        final float flashDurationPct = 2f * flashPeakDurationPct;
436        final Interpolator flashAlphaInterpolator = new Interpolator() {
437            @Override
438            public float getInterpolation(float x) {
439                // Flash the flash view in and out quickly
440                if (x <= flashDurationPct) {
441                    return (float) Math.sin(Math.PI * (x / flashDurationPct));
442                }
443                return 0;
444            }
445        };
446        final Interpolator scaleInterpolator = new Interpolator() {
447            @Override
448            public float getInterpolation(float x) {
449                // We start scaling when the flash is at it's peak
450                if (x < flashPeakDurationPct) {
451                    return 0;
452                }
453                return (x - flashDurationPct) / (1f - flashDurationPct);
454            }
455        };
456        ValueAnimator anim = ValueAnimator.ofFloat(0f, 1f);
457        anim.setDuration(SCREENSHOT_DROP_IN_DURATION);
458        anim.addListener(new AnimatorListenerAdapter() {
459            @Override
460            public void onAnimationStart(Animator animation) {
461                mBackgroundView.setAlpha(0f);
462                mBackgroundView.setVisibility(View.VISIBLE);
463                mScreenshotView.setAlpha(0f);
464                mScreenshotView.setTranslationX(0f);
465                mScreenshotView.setTranslationY(0f);
466                mScreenshotView.setScaleX(SCREENSHOT_SCALE + mBgPaddingScale);
467                mScreenshotView.setScaleY(SCREENSHOT_SCALE + mBgPaddingScale);
468                mScreenshotView.setVisibility(View.VISIBLE);
469                mScreenshotFlash.setAlpha(0f);
470                mScreenshotFlash.setVisibility(View.VISIBLE);
471            }
472            @Override
473            public void onAnimationEnd(android.animation.Animator animation) {
474                mScreenshotFlash.setVisibility(View.GONE);
475            }
476        });
477        anim.addUpdateListener(new AnimatorUpdateListener() {
478            @Override
479            public void onAnimationUpdate(ValueAnimator animation) {
480                float t = (Float) animation.getAnimatedValue();
481                float scaleT = (SCREENSHOT_SCALE + mBgPaddingScale)
482                    - scaleInterpolator.getInterpolation(t)
483                        * (SCREENSHOT_SCALE - SCREENSHOT_DROP_IN_MIN_SCALE);
484                mBackgroundView.setAlpha(scaleInterpolator.getInterpolation(t) * BACKGROUND_ALPHA);
485                mScreenshotView.setAlpha(t);
486                mScreenshotView.setScaleX(scaleT);
487                mScreenshotView.setScaleY(scaleT);
488                mScreenshotFlash.setAlpha(flashAlphaInterpolator.getInterpolation(t));
489            }
490        });
491        return anim;
492    }
493    private ValueAnimator createScreenshotDropOutAnimation(int w, int h, boolean statusBarVisible,
494            boolean navBarVisible) {
495        ValueAnimator anim = ValueAnimator.ofFloat(0f, 1f);
496        anim.setStartDelay(SCREENSHOT_DROP_OUT_DELAY);
497        anim.addListener(new AnimatorListenerAdapter() {
498            @Override
499            public void onAnimationEnd(Animator animation) {
500                mBackgroundView.setVisibility(View.GONE);
501                mScreenshotView.setVisibility(View.GONE);
502                mScreenshotView.setLayerType(View.LAYER_TYPE_NONE, null);
503            }
504        });
505
506        if (!statusBarVisible || !navBarVisible) {
507            // There is no status bar/nav bar, so just fade the screenshot away in place
508            anim.setDuration(SCREENSHOT_FAST_DROP_OUT_DURATION);
509            anim.addUpdateListener(new AnimatorUpdateListener() {
510                @Override
511                public void onAnimationUpdate(ValueAnimator animation) {
512                    float t = (Float) animation.getAnimatedValue();
513                    float scaleT = (SCREENSHOT_DROP_IN_MIN_SCALE + mBgPaddingScale)
514                            - t * (SCREENSHOT_DROP_IN_MIN_SCALE - SCREENSHOT_FAST_DROP_OUT_MIN_SCALE);
515                    mBackgroundView.setAlpha((1f - t) * BACKGROUND_ALPHA);
516                    mScreenshotView.setAlpha(1f - t);
517                    mScreenshotView.setScaleX(scaleT);
518                    mScreenshotView.setScaleY(scaleT);
519                }
520            });
521        } else {
522            // In the case where there is a status bar, animate to the origin of the bar (top-left)
523            final float scaleDurationPct = (float) SCREENSHOT_DROP_OUT_SCALE_DURATION
524                    / SCREENSHOT_DROP_OUT_DURATION;
525            final Interpolator scaleInterpolator = new Interpolator() {
526                @Override
527                public float getInterpolation(float x) {
528                    if (x < scaleDurationPct) {
529                        // Decelerate, and scale the input accordingly
530                        return (float) (1f - Math.pow(1f - (x / scaleDurationPct), 2f));
531                    }
532                    return 1f;
533                }
534            };
535
536            // Determine the bounds of how to scale
537            float halfScreenWidth = (w - 2f * mBgPadding) / 2f;
538            float halfScreenHeight = (h - 2f * mBgPadding) / 2f;
539            final float offsetPct = SCREENSHOT_DROP_OUT_MIN_SCALE_OFFSET;
540            final PointF finalPos = new PointF(
541                -halfScreenWidth + (SCREENSHOT_DROP_OUT_MIN_SCALE + offsetPct) * halfScreenWidth,
542                -halfScreenHeight + (SCREENSHOT_DROP_OUT_MIN_SCALE + offsetPct) * halfScreenHeight);
543
544            // Animate the screenshot to the status bar
545            anim.setDuration(SCREENSHOT_DROP_OUT_DURATION);
546            anim.addUpdateListener(new AnimatorUpdateListener() {
547                @Override
548                public void onAnimationUpdate(ValueAnimator animation) {
549                    float t = (Float) animation.getAnimatedValue();
550                    float scaleT = (SCREENSHOT_DROP_IN_MIN_SCALE + mBgPaddingScale)
551                        - scaleInterpolator.getInterpolation(t)
552                            * (SCREENSHOT_DROP_IN_MIN_SCALE - SCREENSHOT_DROP_OUT_MIN_SCALE);
553                    mBackgroundView.setAlpha((1f - t) * BACKGROUND_ALPHA);
554                    mScreenshotView.setAlpha(1f - scaleInterpolator.getInterpolation(t));
555                    mScreenshotView.setScaleX(scaleT);
556                    mScreenshotView.setScaleY(scaleT);
557                    mScreenshotView.setTranslationX(t * finalPos.x);
558                    mScreenshotView.setTranslationY(t * finalPos.y);
559                }
560            });
561        }
562        return anim;
563    }
564
565    static void notifyScreenshotError(Context context, NotificationManager nManager) {
566        Resources r = context.getResources();
567
568        // Clear all existing notification, compose the new notification and show it
569        Notification n = new Notification.Builder(context)
570            .setTicker(r.getString(R.string.screenshot_failed_title))
571            .setContentTitle(r.getString(R.string.screenshot_failed_title))
572            .setContentText(r.getString(R.string.screenshot_failed_text))
573            .setSmallIcon(R.drawable.stat_notify_image_error)
574            .setWhen(System.currentTimeMillis())
575            .setAutoCancel(true)
576            .getNotification();
577        nManager.notify(SCREENSHOT_NOTIFICATION_ID, n);
578    }
579}
580