GlobalScreenshot.java revision 6311d0a079702b29984c0d31937345be105e1a5e
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.ObjectAnimator; 23import android.animation.TimeInterpolator; 24import android.animation.ValueAnimator; 25import android.animation.ValueAnimator.AnimatorUpdateListener; 26import android.app.Activity; 27import android.content.ContentResolver; 28import android.content.ContentValues; 29import android.content.Context; 30import android.graphics.Bitmap; 31import android.graphics.Canvas; 32import android.graphics.Matrix; 33import android.graphics.PixelFormat; 34import android.media.MediaScannerConnection; 35import android.net.Uri; 36import android.os.AsyncTask; 37import android.os.Binder; 38import android.os.Environment; 39import android.os.ServiceManager; 40import android.provider.MediaStore; 41import android.util.DisplayMetrics; 42import android.util.Log; 43import android.view.Display; 44import android.view.IWindowManager; 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.widget.FrameLayout; 52import android.widget.ImageView; 53import android.widget.TextView; 54import android.widget.Toast; 55 56import com.android.systemui.R; 57 58import java.io.File; 59import java.io.FileOutputStream; 60import java.io.IOException; 61import java.io.OutputStream; 62import java.lang.Thread; 63import java.text.SimpleDateFormat; 64import java.util.Date; 65 66/** 67 * POD used in the AsyncTask which saves an image in the background. 68 */ 69class SaveImageInBackgroundData { 70 Context context; 71 Bitmap image; 72 int result; 73} 74 75/** 76 * An AsyncTask that saves an image to the media store in the background. 77 */ 78class SaveImageInBackgroundTask extends AsyncTask<SaveImageInBackgroundData, Void, 79 SaveImageInBackgroundData> { 80 private static final String TAG = "SaveImageInBackgroundTask"; 81 private static final String SCREENSHOTS_DIR_NAME = "Screenshots"; 82 private static final String SCREENSHOT_FILE_NAME_TEMPLATE = "Screenshot_%s.png"; 83 private static final String SCREENSHOT_FILE_PATH_TEMPLATE = "%s/%s/%s"; 84 85 @Override 86 protected SaveImageInBackgroundData doInBackground(SaveImageInBackgroundData... params) { 87 if (params.length != 1) return null; 88 89 Context context = params[0].context; 90 Bitmap image = params[0].image; 91 92 try { 93 long currentTime = System.currentTimeMillis(); 94 String date = new SimpleDateFormat("yyyy-MM-dd-kk-mm-ss").format(new Date(currentTime)); 95 String imageDir = Environment.getExternalStoragePublicDirectory( 96 Environment.DIRECTORY_PICTURES).getAbsolutePath(); 97 String imageFileName = String.format(SCREENSHOT_FILE_NAME_TEMPLATE, date); 98 String imageFilePath = String.format(SCREENSHOT_FILE_PATH_TEMPLATE, imageDir, 99 SCREENSHOTS_DIR_NAME, imageFileName); 100 101 // Save the screenshot to the MediaStore 102 ContentValues values = new ContentValues(); 103 ContentResolver resolver = context.getContentResolver(); 104 values.put(MediaStore.Images.ImageColumns.DATA, imageFilePath); 105 values.put(MediaStore.Images.ImageColumns.TITLE, imageFileName); 106 values.put(MediaStore.Images.ImageColumns.DISPLAY_NAME, imageFileName); 107 values.put(MediaStore.Images.ImageColumns.DATE_TAKEN, currentTime); 108 values.put(MediaStore.Images.ImageColumns.DATE_ADDED, currentTime); 109 values.put(MediaStore.Images.ImageColumns.DATE_MODIFIED, currentTime); 110 values.put(MediaStore.Images.ImageColumns.MIME_TYPE, "image/png"); 111 Uri uri = resolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values); 112 113 OutputStream out = resolver.openOutputStream(uri); 114 image.compress(Bitmap.CompressFormat.PNG, 100, out); 115 out.flush(); 116 out.close(); 117 118 // update file size in the database 119 values.clear(); 120 values.put(MediaStore.Images.ImageColumns.SIZE, new File(imageFilePath).length()); 121 resolver.update(uri, values, null, null); 122 123 params[0].result = 0; 124 } catch (Exception e) { 125 // IOException/UnsupportedOperationException may be thrown if external storage is not 126 // mounted 127 params[0].result = 1; 128 } 129 130 return params[0]; 131 }; 132 133 @Override 134 protected void onPostExecute(SaveImageInBackgroundData params) { 135 if (params.result > 0) { 136 // Show a message that we've failed to save the image to disk 137 Toast.makeText(params.context, R.string.screenshot_failed_toast, 138 Toast.LENGTH_SHORT).show(); 139 } else { 140 // Show a message that we've saved the screenshot to disk 141 Toast.makeText(params.context, R.string.screenshot_saving_toast, 142 Toast.LENGTH_SHORT).show(); 143 } 144 }; 145} 146 147/** 148 * TODO: 149 * - Performance when over gl surfaces? Ie. Gallery 150 * - what do we say in the Toast? Which icon do we get if the user uses another 151 * type of gallery? 152 */ 153class GlobalScreenshot { 154 private static final String TAG = "GlobalScreenshot"; 155 private static final int SCREENSHOT_FADE_IN_DURATION = 900; 156 private static final int SCREENSHOT_FADE_OUT_DELAY = 1000; 157 private static final int SCREENSHOT_FADE_OUT_DURATION = 450; 158 private static final int TOAST_FADE_IN_DURATION = 500; 159 private static final int TOAST_FADE_OUT_DELAY = 1000; 160 private static final int TOAST_FADE_OUT_DURATION = 500; 161 private static final float BACKGROUND_ALPHA = 0.65f; 162 private static final float SCREENSHOT_SCALE = 0.85f; 163 private static final float SCREENSHOT_MIN_SCALE = 0.7f; 164 private static final float SCREENSHOT_ROTATION = -6.75f; // -12.5f; 165 166 private Context mContext; 167 private LayoutInflater mLayoutInflater; 168 private IWindowManager mIWindowManager; 169 private WindowManager mWindowManager; 170 private WindowManager.LayoutParams mWindowLayoutParams; 171 private Display mDisplay; 172 private DisplayMetrics mDisplayMetrics; 173 private Matrix mDisplayMatrix; 174 175 private Bitmap mScreenBitmap; 176 private View mScreenshotLayout; 177 private ImageView mBackgroundView; 178 private FrameLayout mScreenshotContainerView; 179 private ImageView mScreenshotView; 180 181 private AnimatorSet mScreenshotAnimation; 182 183 // General use cubic interpolator 184 final TimeInterpolator mCubicInterpolator = new TimeInterpolator() { 185 public float getInterpolation(float t) { 186 return t*t*t; 187 } 188 }; 189 // The interpolator used to control the background alpha at the start of the animation 190 final TimeInterpolator mBackgroundViewAlphaInterpolator = new TimeInterpolator() { 191 public float getInterpolation(float t) { 192 float tStep = 0.35f; 193 if (t < tStep) { 194 return t * (1f / tStep); 195 } else { 196 return 1f; 197 } 198 } 199 }; 200 201 /** 202 * @param context everything needs a context :( 203 */ 204 public GlobalScreenshot(Context context) { 205 mContext = context; 206 mLayoutInflater = (LayoutInflater) 207 context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 208 209 // Inflate the screenshot layout 210 mDisplayMetrics = new DisplayMetrics(); 211 mDisplayMatrix = new Matrix(); 212 mScreenshotLayout = mLayoutInflater.inflate(R.layout.global_screenshot, null); 213 mBackgroundView = (ImageView) mScreenshotLayout.findViewById(R.id.global_screenshot_background); 214 mScreenshotContainerView = (FrameLayout) mScreenshotLayout.findViewById(R.id.global_screenshot_container); 215 mScreenshotView = (ImageView) mScreenshotLayout.findViewById(R.id.global_screenshot); 216 mScreenshotLayout.setFocusable(true); 217 mScreenshotLayout.setOnTouchListener(new View.OnTouchListener() { 218 @Override 219 public boolean onTouch(View v, MotionEvent event) { 220 // Intercept and ignore all touch events 221 return true; 222 } 223 }); 224 225 // Setup the window that we are going to use 226 mIWindowManager = IWindowManager.Stub.asInterface( 227 ServiceManager.getService(Context.WINDOW_SERVICE)); 228 mWindowLayoutParams = new WindowManager.LayoutParams( 229 ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT, 0, 0, 230 WindowManager.LayoutParams.TYPE_SECURE_SYSTEM_OVERLAY, 231 WindowManager.LayoutParams.FLAG_FULLSCREEN 232 | WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED 233 | WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED_SYSTEM 234 | WindowManager.LayoutParams.FLAG_KEEP_SURFACE_WHILE_ANIMATING 235 | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN 236 | WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED, 237 PixelFormat.TRANSLUCENT); 238 mWindowLayoutParams.token = new Binder(); 239 mWindowLayoutParams.setTitle("ScreenshotAnimation"); 240 mWindowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); 241 mDisplay = mWindowManager.getDefaultDisplay(); 242 } 243 244 /** 245 * Creates a new worker thread and saves the screenshot to the media store. 246 */ 247 private void saveScreenshotInWorkerThread() { 248 SaveImageInBackgroundData data = new SaveImageInBackgroundData(); 249 data.context = mContext; 250 data.image = mScreenBitmap; 251 new SaveImageInBackgroundTask().execute(data); 252 } 253 254 /** 255 * @return the current display rotation in degrees 256 */ 257 private float getDegreesForRotation(int value) { 258 switch (value) { 259 case Surface.ROTATION_90: 260 return 90f; 261 case Surface.ROTATION_180: 262 return 180f; 263 case Surface.ROTATION_270: 264 return 270f; 265 } 266 return 0f; 267 } 268 269 /** 270 * Takes a screenshot of the current display and shows an animation. 271 */ 272 void takeScreenshot() { 273 // We need to orient the screenshot correctly (and the Surface api seems to take screenshots 274 // only in the natural orientation of the device :!) 275 mDisplay.getRealMetrics(mDisplayMetrics); 276 float[] dims = {mDisplayMetrics.widthPixels, mDisplayMetrics.heightPixels}; 277 float degrees = getDegreesForRotation(mDisplay.getRotation()); 278 boolean requiresRotation = (degrees > 0); 279 if (requiresRotation) { 280 // Get the dimensions of the device in its native orientation 281 mDisplayMatrix.reset(); 282 mDisplayMatrix.preRotate(-degrees); 283 mDisplayMatrix.mapPoints(dims); 284 dims[0] = Math.abs(dims[0]); 285 dims[1] = Math.abs(dims[1]); 286 } 287 mScreenBitmap = Surface.screenshot((int) dims[0], (int) dims[1]); 288 if (requiresRotation) { 289 // Rotate the screenshot to the current orientation 290 Bitmap ss = Bitmap.createBitmap(mDisplayMetrics.widthPixels, 291 mDisplayMetrics.heightPixels, Bitmap.Config.ARGB_8888); 292 Canvas c = new Canvas(ss); 293 c.translate(ss.getWidth() / 2, ss.getHeight() / 2); 294 c.rotate(360f - degrees); 295 c.translate(-dims[0] / 2, -dims[1] / 2); 296 c.drawBitmap(mScreenBitmap, 0, 0, null); 297 c.setBitmap(null); 298 mScreenBitmap = ss; 299 } 300 301 // If we couldn't take the screenshot, notify the user 302 if (mScreenBitmap == null) { 303 Toast.makeText(mContext, R.string.screenshot_failed_toast, 304 Toast.LENGTH_SHORT).show(); 305 return; 306 } 307 308 // Start the post-screenshot animation 309 startAnimation(); 310 } 311 312 313 /** 314 * Starts the animation after taking the screenshot 315 */ 316 private void startAnimation() { 317 // Add the view for the animation 318 mScreenshotView.setImageBitmap(mScreenBitmap); 319 mScreenshotLayout.requestFocus(); 320 321 // Setup the animation with the screenshot just taken 322 if (mScreenshotAnimation != null) { 323 mScreenshotAnimation.end(); 324 } 325 326 mWindowManager.addView(mScreenshotLayout, mWindowLayoutParams); 327 ValueAnimator screenshotFadeInAnim = createScreenshotFadeInAnimation(); 328 ValueAnimator screenshotFadeOutAnim = createScreenshotFadeOutAnimation(); 329 mScreenshotAnimation = new AnimatorSet(); 330 mScreenshotAnimation.play(screenshotFadeInAnim).before(screenshotFadeOutAnim); 331 mScreenshotAnimation.addListener(new AnimatorListenerAdapter() { 332 @Override 333 public void onAnimationEnd(Animator animation) { 334 // Save the screenshot once we have a bit of time now 335 saveScreenshotInWorkerThread(); 336 337 mWindowManager.removeView(mScreenshotLayout); 338 } 339 }); 340 mScreenshotAnimation.start(); 341 } 342 private ValueAnimator createScreenshotFadeInAnimation() { 343 ValueAnimator anim = ValueAnimator.ofFloat(0f, 1f); 344 anim.setInterpolator(mCubicInterpolator); 345 anim.setDuration(SCREENSHOT_FADE_IN_DURATION); 346 anim.addListener(new AnimatorListenerAdapter() { 347 @Override 348 public void onAnimationStart(Animator animation) { 349 mBackgroundView.setVisibility(View.VISIBLE); 350 mScreenshotContainerView.setVisibility(View.VISIBLE); 351 } 352 }); 353 anim.addUpdateListener(new AnimatorUpdateListener() { 354 @Override 355 public void onAnimationUpdate(ValueAnimator animation) { 356 float t = ((Float) animation.getAnimatedValue()).floatValue(); 357 mBackgroundView.setAlpha(mBackgroundViewAlphaInterpolator.getInterpolation(t) * 358 BACKGROUND_ALPHA); 359 float scaleT = SCREENSHOT_SCALE + (1f - t) * SCREENSHOT_SCALE; 360 mScreenshotContainerView.setAlpha(t*t*t*t); 361 mScreenshotContainerView.setScaleX(scaleT); 362 mScreenshotContainerView.setScaleY(scaleT); 363 mScreenshotContainerView.setRotation(t * SCREENSHOT_ROTATION); 364 } 365 }); 366 return anim; 367 } 368 private ValueAnimator createScreenshotFadeOutAnimation() { 369 ValueAnimator anim = ValueAnimator.ofFloat(1f, 0f); 370 anim.setInterpolator(mCubicInterpolator); 371 anim.setStartDelay(SCREENSHOT_FADE_OUT_DELAY); 372 anim.setDuration(SCREENSHOT_FADE_OUT_DURATION); 373 anim.addListener(new AnimatorListenerAdapter() { 374 @Override 375 public void onAnimationEnd(Animator animation) { 376 mBackgroundView.setVisibility(View.GONE); 377 mScreenshotContainerView.setVisibility(View.GONE); 378 } 379 }); 380 anim.addUpdateListener(new AnimatorUpdateListener() { 381 @Override 382 public void onAnimationUpdate(ValueAnimator animation) { 383 float t = ((Float) animation.getAnimatedValue()).floatValue(); 384 float scaleT = SCREENSHOT_MIN_SCALE + 385 t*(SCREENSHOT_SCALE - SCREENSHOT_MIN_SCALE); 386 mScreenshotContainerView.setAlpha(t); 387 mScreenshotContainerView.setScaleX(scaleT); 388 mScreenshotContainerView.setScaleY(scaleT); 389 mBackgroundView.setAlpha(t * t * BACKGROUND_ALPHA); 390 } 391 }); 392 return anim; 393 } 394} 395