WallpaperPickerActivity.java 文件源码

@Override
public void onClick(final WallpaperPickerActivity a) {
    a.setWallpaperButtonEnabled(false);
    final BitmapRegionTileSource.ResourceBitmapSource bitmapSource =
            new BitmapRegionTileSource.ResourceBitmapSource(mResources, mResId);
    a.setCropViewTileSource(bitmapSource, false, false, new CropViewScaleAndOffsetProvider() {

        @Override
        public float getScale(Point wallpaperSize, RectF crop) {
            return wallpaperSize.x /crop.width();
        }

        @Override
        public float getParallaxOffset() {
            return a.getWallpaperParallaxOffset();
        }
    }, new Runnable() {

        @Override
        public void run() {
            if (bitmapSource.getLoadingState() == BitmapSource.State.LOADED) {
                a.setWallpaperButtonEnabled(true);
            }
        }
    });
}