/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.systemui.screenshot;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.animation.ValueAnimator;
import android.animation.ValueAnimator.AnimatorUpdateListener;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.PixelFormat;
import android.graphics.PointF;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Environment;
import android.os.Process;
import android.os.ServiceManager;
import android.provider.MediaStore;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.IWindowManager;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.Surface;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.DecelerateInterpolator;
import android.view.animation.Interpolator;
import android.widget.FrameLayout;
import android.widget.ImageView;
import com.android.systemui.R;
import java.io.File;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* POD used in the AsyncTask which saves an image in the background.
*/
class SaveImageInBackgroundData {
Context context;
Bitmap image;
Uri imageUri;
Runnable finisher;
int iconSize;
int result;
}
/**
* An AsyncTask that saves an image to the media store in the background.
*/
class SaveImageInBackgroundTask extends AsyncTask<SaveImageInBackgroundData, Void,
SaveImageInBackgroundData> {
private static final String TAG = "SaveImageInBackgroundTask";
private static final String SCREENSHOTS_DIR_NAME = "Screenshots";
private static final String SCREENSHOT_FILE_NAME_TEMPLATE = "Screenshot_%s.png";
private static final String SCREENSHOT_FILE_PATH_TEMPLATE = "%s/%s/%s";
private int mNotificationId;
private NotificationManager mNotificationManager;
private Notification.Builder mNotificationBuilder;
private Intent mLaunchIntent;
private String mImageDir;
private String mImageFileName;
private String mImageFilePath;
private String mImageDate;
private long mImageTime;
// WORKAROUND: We want the same notification across screenshots that we update so that we don't
// spam a user's notification drawer. However, we only show the ticker for the saving state
// and if the ticker text is the same as the previous notification, then it will not show. So
// for now, we just add and remove a space from the ticker text to trigger the animation when
// necessary.
private static boolean mTickerAddSpace;
SaveImageInBackgroundTask(Context context, SaveImageInBackgroundData data,
NotificationManager nManager, int nId) {
Resources r = context.getResources();
// Prepare all the output metadata
mImageTime = System.currentTimeMillis();
mImageDate = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss").format(new Date(mImageTime));
mImageDir = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES).getAbsolutePath();
mImageFileName = String.format(SCREENSHOT_FILE_NAME_TEMPLATE, mImageDate);
mImageFilePath = String.format(SCREENSHOT_FILE_PATH_TEMPLATE, mImageDir,
SCREENSHOTS_DIR_NAME, mImageFileName);
// Create the large notification icon
int imageWidth = data.image.getWidth();
int imageHeight = data.image.getHeight();
int iconWidth = data.iconSize;
int iconHeight = data.iconSize;
if (imageWidth > imageHeight) {
iconWidth = (int) (((float) iconHeight / imageHeight) * imageWidth);
} else {
iconHeight = (int) (((float) iconWidth / imageWidth) * imageHeight);
}
Bitmap rawIcon = Bitmap.createScaledBitmap(data.image, iconWidth, iconHeight, true);
Bitmap croppedIcon = Bitmap.createBitmap(rawIcon, (iconWidth - data.iconSize) / 2,
(iconHeight - data.iconSize) / 2, data.iconSize, data.iconSize);
// Show the intermediate notification
mTickerAddSpace = !mTickerAddSpace;
mNotificationId = nId;
mNotificationBuilder = new Notification.Builder(context)
.setLargeIcon(croppedIcon)
.setTicker(r.getString(R.string.screenshot_saving_ticker)
+ (mTickerAddSpace ? " " : ""))
.setContentTitle(r.getString(R.string.screenshot_saving_title))
.setContentText(r.getString(R.string.screenshot_saving_text))
.setSmallIcon(R.drawable.stat_notify_image)
.setWhen(System.currentTimeMillis());
Notification n = mNotificationBuilder.getNotification();
n.flags |= Notification.FLAG_NO_CLEAR;
mNotificationManager = nManager;
mNotificationManager.notify(nId, n);
}
@Override
protected SaveImageInBackgroundData doInBackground(SaveImageInBackgroundData... params) {
if (params.length != 1) return null;
// By default, AsyncTask sets the worker thread to have background thread priority, so bump
// it back up so that we save a little quicker.
Process.setThreadPriority(Process.THREAD_PRIORITY_FOREGROUND);
Context context = params[0].context;
Bitmap image = params[0].image;
try {
// Save the screenshot to the MediaStore
ContentValues values = new ContentValues();
ContentResolver resolver = context.getContentResolver();
values.put(MediaStore.Images.ImageColumns.DATA, mImageFilePath);
values.put(MediaStore.Images.ImageColumns.TITLE, mImageFileName);
values.put(MediaStore.Images.ImageColumns.DISPLAY_NAME, mImageFileName);
values.put(MediaStore.Images.ImageColumns.DATE_TAKEN, mImageTime);
values.put(MediaStore.Images.ImageColumns.DATE_ADDED, mImageTime);
values.put(MediaStore.Images.ImageColumns.DATE_MODIFIED, mImageTime);
values.put(MediaStore.Images.ImageColumns.MIME_TYPE, "image/png");
Uri uri = resolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
OutputStream out = resolver.openOutputStream(uri);
image.compress(Bitmap.CompressFormat.PNG, 100, out);
out.flush();
out.close();
// update file size in the database
values.clear();
values.put(MediaStore.Images.ImageColumns.SIZE, new File(mImageFilePath).length());
resolver.update(uri, values, null, null);
params[0].imageUri = uri;
params[0].result = 0;
} catch (Exception e) {
// IOException/UnsupportedOperationException may be thrown if external storage is not
// mounted
params[0].result = 1;
}
return params[0];
};
@Override
protected void onPostExecute(SaveImageInBackgroundData params) {
if (params.result > 0) {
// Show a message that we've failed to save the image to disk
GlobalScreenshot.notifyScreenshotError(params.context, mNotificationManager);
} else {
// Show the final notification to indicate screenshot saved
Resources r = params.context.getResources();
// Create the intent to show the screenshot in gallery
mLaunchIntent = new Intent(Intent.ACTION_VIEW);
mLaunchIntent.setDataAndType(params.imageUri, "image/png");
mLaunchIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
mNotificationBuilder
.setContentTitle(r.getString(R.string.screenshot_saved_title))
.setContentText(r.getString(R.string.screenshot_saved_text))
.setContentIntent(PendingIntent.getActivity(params.context, 0, mLaunchIntent, 0))
.setWhen(System.currentTimeMillis())
.setAutoCancel(true);
Notification n = mNotificationBuilder.getNotification();
n.flags &= ~Notification.FLAG_NO_CLEAR;
mNotificationManager.notify(mNotificationId, n);
}
params.finisher.run();
};
}
/**
* TODO:
* - Performance when over gl surfaces? Ie. Gallery
* - what do we say in the Toast? Which icon do we get if the user uses another
* type of gallery?
*/
class GlobalScreenshot {
private static final String TAG = "GlobalScreenshot";
private static final int SCREENSHOT_NOTIFICATION_ID = 789;
private static final int SCREENSHOT_FLASH_TO_PEAK_DURATION = 130;
private static final int SCREENSHOT_DROP_IN_DURATION = 430;
private static final int SCREENSHOT_DROP_OUT_DELAY = 500;
private static final int SCREENSHOT_DROP_OUT_DURATION = 430;
private static final int SCREENSHOT_DROP_OUT_SCALE_DURATION = 370;
private static final int SCREENSHOT_FAST_DROP_OUT_DURATION = 320;
private static final float BACKGROUND_ALPHA = 0.5f;
private static final float SCREENSHOT_SCALE = 1f;
private static final float SCREENSHOT_DROP_IN_MIN_SCALE = SCREENSHOT_SCALE * 0.725f;
private static final float SCREENSHOT_DROP_OUT_MIN_SCALE = SCREENSHOT_SCALE * 0.45f;
private static final float SCREENSHOT_FAST_DROP_OUT_MIN_SCALE = SCREENSHOT_SCALE * 0.6f;
private static final float SCREENSHOT_DROP_OUT_MIN_SCALE_OFFSET = 0f;
private Context mContext;
private LayoutInflater mLayoutInflater;
private IWindowManager mIWindowManager;
private WindowManager mWindowManager;
private WindowManager.LayoutParams mWindowLayoutParams;
private NotificationManager mNotificationManager;
private Display mDisplay;
private DisplayMetrics mDisplayMetrics;
private Matrix mDisplayMatrix;
private Bitmap mScreenBitmap;
private View mScreenshotLayout;
private ImageView mBackgroundView;
private FrameLayout mScreenshotContainerView;
private ImageView mScreenshotView;
private ImageView mScreenshotFlash;
private AnimatorSet mScreenshotAnimation;
private int mNotificationIconSize;
private float mBgPadding;
private float mBgPaddingScale;
/**
* @param context everything needs a context :(
*/
public GlobalScreenshot(Context context) {
Resources r = context.getResources();
mContext = context;
mLayoutInflater = (LayoutInflater)
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// Inflate the screenshot layout
mDisplayMatrix = new Matrix();
mScreenshotLayout = mLayoutInflater.inflate(R.layout.global_screenshot, null);
mBackgroundView = (ImageView) mScreenshotLayout.findViewById(R.id.global_screenshot_background);
mScreenshotContainerView = (FrameLayout) mScreenshotLayout.findViewById(R.id.global_screenshot_container);
mScreenshotView = (ImageView) mScreenshotLayout.findViewById(R.id.global_screenshot);
mScreenshotFlash = (ImageView) mScreenshotLayout.findViewById(R.id.global_screenshot_flash);
mScreenshotLayout.setFocusable(true);
mScreenshotLayout.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// Intercept and ignore all touch events
return true;
}
});
// Setup the window that we are going to use
mIWindowManager = IWindowManager.Stub.asInterface(
ServiceManager.getService(Context.WINDOW_SERVICE));
mWindowLayoutParams = new WindowManager.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT, 0, 0,
WindowManager.LayoutParams.TYPE_SECURE_SYSTEM_OVERLAY,
WindowManager.LayoutParams.FLAG_FULLSCREEN
| WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED
| WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
| WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED,
PixelFormat.TRANSLUCENT);
mWindowLayoutParams.setTitle("ScreenshotAnimation");
mWindowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
mNotificationManager =
(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
mDisplay = mWindowManager.getDefaultDisplay();
mDisplayMetrics = new DisplayMetrics();
mDisplay.getRealMetrics(mDisplayMetrics);
// Get the various target sizes
mNotificationIconSize =
r.getDimensionPixelSize(android.R.dimen.notification_large_icon_height);
// Scale has to account for both sides of the bg
mBgPadding = (float) r.getDimensionPixelSize(R.dimen.global_screenshot_bg_padding);
mBgPaddingScale = mBgPadding / mDisplayMetrics.widthPixels;
}
/**
* Creates a new worker thread and saves the screenshot to the media store.
*/
private void saveScreenshotInWorkerThread(Runnable finisher) {
SaveImageInBackgroundData data = new SaveImageInBackgroundData();
data.context = mContext;
data.image = mScreenBitmap;
data.iconSize = mNotificationIconSize;
data.finisher = finisher;
new SaveImageInBackgroundTask(mContext, data, mNotificationManager,
SCREENSHOT_NOTIFICATION_ID).execute(data);
}
/**
* @return the current display rotation in degrees
*/
private float getDegreesForRotation(int value) {
switch (value) {
case Surface.ROTATION_90:
return 360f - 90f;
case Surface.ROTATION_180:
return 360f - 180f;
case Surface.ROTATION_270:
return 360f - 270f;
}
return 0f;
}
/**
* Takes a screenshot of the current display and shows an animation.
*/
void takeScreenshot(Runnable finisher, boolean statusBarVisible, boolean navBarVisible) {
// We need to orient the screenshot correctly (and the Surface api seems to take screenshots
// only in the natural orientation of the device :!)
mDisplay.getRealMetrics(mDisplayMetrics);
float[] dims = {mDisplayMetrics.widthPixels, mDisplayMetrics.heightPixels};
float degrees = getDegreesForRotation(mDisplay.getRotation());
boolean requiresRotation = (degrees > 0);
if (requiresRotation) {
// Get the dimensions of the device in its native orientation
mDisplayMatrix.reset();
mDisplayMatrix.preRotate(-degrees);
mDisplayMatrix.mapPoints(dims);
dims[0] = Math.abs(dims[0]);
dims[1] = Math.abs(dims[1]);
}
mScreenBitmap = Surface.screenshot((int) dims[0], (int) dims[1]);
if (requiresRotation) {
// Rotate the screenshot to the current orientation
Bitmap ss = Bitmap.createBitmap(mDisplayMetrics.widthPixels,
mDisplayMetrics.heightPixels, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(ss);
c.translate(ss.getWidth() / 2, ss.getHeight() / 2);
c.rotate(degrees);
c.translate(-dims[0] / 2, -dims[1] / 2);
c.drawBitmap(mScreenBitmap, 0, 0, null);
c.setBitmap(null);
mScreenBitmap = ss;
}
// If we couldn't take the screenshot, notify the user
if (mScreenBitmap == null) {
notifyScreenshotError(mContext, mNotificationManager);
finisher.run();
return;
}
// Optimizations
mScreenBitmap.setHasAlpha(false);
mScreenBitmap.prepareToDraw();
// Start the post-screenshot animation
startAnimation(finisher, mDisplayMetrics.widthPixels, mDisplayMetrics.heightPixels,
statusBarVisible, navBarVisible);
}
/**
* Starts the animation after taking the screenshot
*/
private void startAnimation(final Runnable finisher, int w, int h, boolean statusBarVisible,
boolean navBarVisible) {
// Add the view for the animation
mScreenshotView.setImageBitmap(mScreenBitmap);
mScreenshotLayout.requestFocus();
// Setup the animation with the screenshot just taken
if (mScreenshotAnimation != null) {
mScreenshotAnimation.end();
}
mWindowManager.addView(mScreenshotLayout, mWindowLayoutParams);
ValueAnimator screenshotDropInAnim = createScreenshotDropInAnimation();
ValueAnimator screenshotFadeOutAnim = createScreenshotDropOutAnimation(w, h,
statusBarVisible, navBarVisible);
mScreenshotAnimation = new AnimatorSet();
mScreenshotAnimation.playSequentially(screenshotDropInAnim, screenshotFadeOutAnim);
mScreenshotAnimation.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
// Save the screenshot once we have a bit of time now
saveScreenshotInWorkerThread(finisher);
mWindowManager.removeView(mScreenshotLayout);
}
});
mScreenshotLayout.post(new Runnable() {
@Override
public void run() {
mScreenshotContainerView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
mScreenshotContainerView.buildLayer();
mScreenshotAnimation.start();
}
});
}
private ValueAnimator createScreenshotDropInAnimation() {
final float flashPeakDurationPct = ((float) (SCREENSHOT_FLASH_TO_PEAK_DURATION)
/ SCREENSHOT_DROP_IN_DURATION);
final float flashDurationPct = 2f * flashPeakDurationPct;
final Interpolator flashAlphaInterpolator = new Interpolator() {
@Override
public float getInterpolation(float x) {
// Flash the flash view in and out quickly
if (x <= flashDurationPct) {
return (float) Math.sin(Math.PI * (x / flashDurationPct));
}
return 0;
}
};
final Interpolator scaleInterpolator = new Interpolator() {
@Override
public float getInterpolation(float x) {
// We start scaling when the flash is at it's peak
if (x < flashPeakDurationPct) {
return 0;
}
return (x - flashDurationPct) / (1f - flashDurationPct);
}
};
ValueAnimator anim = ValueAnimator.ofFloat(0f, 1f);
anim.setDuration(SCREENSHOT_DROP_IN_DURATION);
anim.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationStart(Animator animation) {
mBackgroundView.setAlpha(0f);
mBackgroundView.setVisibility(View.VISIBLE);
mScreenshotContainerView.setAlpha(0f);
mScreenshotContainerView.setTranslationX(0f);
mScreenshotContainerView.setTranslationY(0f);
mScreenshotContainerView.setScaleX(SCREENSHOT_SCALE + mBgPaddingScale);
mScreenshotContainerView.setScaleY(SCREENSHOT_SCALE + mBgPaddingScale);
mScreenshotContainerView.setVisibility(View.VISIBLE);
mScreenshotFlash.setAlpha(0f);
mScreenshotFlash.setVisibility(View.VISIBLE);
}
@Override
public void onAnimationEnd(android.animation.Animator animation) {
mScreenshotFlash.setVisibility(View.GONE);
}
});
anim.addUpdateListener(new AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
float t = ((Float) animation.getAnimatedValue()).floatValue();
float scaleT = (SCREENSHOT_SCALE + mBgPaddingScale)
- (float) scaleInterpolator.getInterpolation(t)
* (SCREENSHOT_SCALE - SCREENSHOT_DROP_IN_MIN_SCALE);
mBackgroundView.setAlpha(scaleInterpolator.getInterpolation(t) * BACKGROUND_ALPHA);
mScreenshotContainerView.setAlpha(t);
mScreenshotContainerView.setScaleX(scaleT);
mScreenshotContainerView.setScaleY(scaleT);
mScreenshotFlash.setAlpha(flashAlphaInterpolator.getInterpolation(t));
}
});
return anim;
}
private ValueAnimator createScreenshotDropOutAnimation(int w, int h, boolean statusBarVisible,
boolean navBarVisible) {
ValueAnimator anim = ValueAnimator.ofFloat(0f, 1f);
anim.setStartDelay(SCREENSHOT_DROP_OUT_DELAY);
anim.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
mBackgroundView.setVisibility(View.GONE);
mScreenshotContainerView.setVisibility(View.GONE);
mScreenshotContainerView.setLayerType(View.LAYER_TYPE_NONE, null);
}
});
if (!statusBarVisible || !navBarVisible) {
// There is no status bar/nav bar, so just fade the screenshot away in place
anim.setDuration(SCREENSHOT_FAST_DROP_OUT_DURATION);
anim.addUpdateListener(new AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
float t = ((Float) animation.getAnimatedValue()).floatValue();
float scaleT = (SCREENSHOT_DROP_IN_MIN_SCALE + mBgPaddingScale)
- (float) t * (SCREENSHOT_DROP_IN_MIN_SCALE
- SCREENSHOT_FAST_DROP_OUT_MIN_SCALE);
mBackgroundView.setAlpha((1f - t) * BACKGROUND_ALPHA);
mScreenshotContainerView.setAlpha(1f - t);
mScreenshotContainerView.setScaleX(scaleT);
mScreenshotContainerView.setScaleY(scaleT);
}
});
} else {
// In the case where there is a status bar, animate to the origin of the bar (top-left)
final float scaleDurationPct = (float) SCREENSHOT_DROP_OUT_SCALE_DURATION
/ SCREENSHOT_DROP_OUT_DURATION;
final Interpolator scaleInterpolator = new Interpolator() {
@Override
public float getInterpolation(float x) {
if (x < scaleDurationPct) {
// Decelerate, and scale the input accordingly
return (float) (1f - Math.pow(1f - (x / scaleDurationPct), 2f));
}
return 1f;
}
};
// Determine the bounds of how to scale
float halfScreenWidth = (w - 2f * mBgPadding) / 2f;
float halfScreenHeight = (h - 2f * mBgPadding) / 2f;
final float offsetPct = SCREENSHOT_DROP_OUT_MIN_SCALE_OFFSET;
final PointF finalPos = new PointF(
-halfScreenWidth + (SCREENSHOT_DROP_OUT_MIN_SCALE + offsetPct) * halfScreenWidth,
-halfScreenHeight + (SCREENSHOT_DROP_OUT_MIN_SCALE + offsetPct) * halfScreenHeight);
// Animate the screenshot to the status bar
anim.setDuration(SCREENSHOT_DROP_OUT_DURATION);
anim.addUpdateListener(new AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
float t = ((Float) animation.getAnimatedValue()).floatValue();
float scaleT = (SCREENSHOT_DROP_IN_MIN_SCALE + mBgPaddingScale)
- (float) scaleInterpolator.getInterpolation(t)
* (SCREENSHOT_DROP_IN_MIN_SCALE - SCREENSHOT_DROP_OUT_MIN_SCALE);
mBackgroundView.setAlpha((1f - t) * BACKGROUND_ALPHA);
mScreenshotContainerView.setAlpha(1f - scaleInterpolator.getInterpolation(t));
mScreenshotContainerView.setScaleX(scaleT);
mScreenshotContainerView.setScaleY(scaleT);
mScreenshotContainerView.setTranslationX(t * finalPos.x);
mScreenshotContainerView.setTranslationY(t * finalPos.y);
}
});
}
return anim;
}
static void notifyScreenshotError(Context context, NotificationManager nManager) {
Resources r = context.getResources();
// Clear all existing notification, compose the new notification and show it
Notification n = new Notification.Builder(context)
.setTicker(r.getString(R.string.screenshot_failed_title))
.setContentTitle(r.getString(R.string.screenshot_failed_title))
.setContentText(r.getString(R.string.screenshot_failed_text))
.setSmallIcon(R.drawable.stat_notify_image_error)
.setWhen(System.currentTimeMillis())
.setAutoCancel(true)
.getNotification();
nManager.notify(SCREENSHOT_NOTIFICATION_ID, n);
}
}