MotionDetectorCamera2.java 文件源码

private void configureTransform(TextureView textureView) {
    if (null == textureView || null == mPreviewSize || null == mActivity) {
        return;
    }
    int rotation = mActivity.getWindowManager().getDefaultDisplay().getRotation();
    Matrix matrix = new Matrix();
    RectF viewRect = new RectF(0, 0, textureView.getWidth(), textureView.getHeight());
    RectF bufferRect = new RectF(0, 0, mPreviewSize.y, mPreviewSize.x);
    float centerX = viewRect.centerX();
    float centerY = viewRect.centerY();
    if (Surface.ROTATION_90 == rotation || Surface.ROTATION_270 == rotation) {
        bufferRect.offset(centerX - bufferRect.centerX(), centerY - bufferRect.centerY());
        matrix.setRectToRect(viewRect, bufferRect, Matrix.ScaleToFit.FILL);
        float scale = Math.max(
                (float) textureView.getHeight() / mPreviewSize.y,
                (float) textureView.getWidth() / mPreviewSize.x);
        matrix.postScale(scale, scale, centerX, centerY);
    }
    matrix.postRotate(-90 * rotation, centerX, centerY);
    textureView.setTransform(matrix);
}