大图片在屏幕中间的缩放以及如何捕获耳机声音流的捕获

protected void zoomTo(float scale, float centerX, float centerY) {     if (scale > mMaxZoom) {         scale = mMaxZoom;     }      float oldScale = getScale();     float deltaScale = scale / oldScale;      mSuppMatrix.postScale(deltaScale, deltaScale, centerX, centerY);     setImageMatrix(getImageViewMatrix());     center(true, true); } 

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protected void center(boolean horizontal, boolean vertical) {     if (mBitmapDisplayed.getBitmap() == null) {         return;     }      Matrix m = getImageViewMatrix();      RectF rect = new RectF(0, 0,             mBitmapDisplayed.getBitmap().getWidth(),             mBitmapDisplayed.getBitmap().getHeight());      m.mapRect(rect);      float height = rect.height();     float width  = rect.width();      float deltaX = 0, deltaY = 0;      if (vertical) {         int viewHeight = getHeight();         if (height < viewHeight) {             deltaY = (viewHeight - height) / 2 - rect.top;         } else if (rect.top > 0) {             deltaY = -rect.top;         } else if (rect.bottom < viewHeight) {             deltaY = getHeight() - rect.bottom;         }     }      if (horizontal) {         int viewWidth = getWidth();         if (width < viewWidth) {             deltaX = (viewWidth - width) / 2 - rect.left;         } else if (rect.left > 0) {             deltaX = -rect.left;         } else if (rect.right < viewWidth) {             deltaX = viewWidth - rect.right;         }     }      postTranslate(deltaX, deltaY);     setImageMatrix(getImageViewMatrix()); } 

?捕获耳机声音流

MediaRecorder recorder = new MediaRecorder(); recorder.setAudioSource(MediaRecorder.AudioSource.VOICE_DOWNLINK); 

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可以参看

?MediaRecorder.AudioSource?? VOICE_DOWNLINK source.