Android 图片处理，实现蒙层效果

Android 图片处理，实现蒙层效果

代码如下

xml :

<FrameLayout android:layout_width="match_parent" android:layout_height="300dp">
    <ImageView android:id="@+id/old_image" android:layout_width="match_parent" android:layout_height="match_parent" android:scaleType="fitXY" android:src="@drawable/test"/>
    <ImageView android:id="@+id/blur_image" android:layout_width="match_parent" android:layout_height="match_parent" android:scaleType="fitXY"/>

</FrameLayout>

Activity :

private ImageView old_image, blur_image;
private Bitmap mBitmap, overlay;

@Override
public void onCreate(Bundle savedInstanceState) {Create(savedInstanceState);
    setContentView(R.layout.main);
    old_image = (ImageView) findViewById(R.id.old_image);
    blur_image = (ImageView) findViewById(R.id.blur_image);

    //设置模糊图片的长和宽
    ViewGroup.LayoutParams params = LayoutParams();
    params.height = 600;
    params.width = ViewGroup.LayoutParams.MATCH_PARENT;
    blur_image.setLayoutParams(params);

    //得到模糊图片
    if (null != overlay) {blur_image.setImageBitmap(overlay);
    }//将old_image对象转化为bitmap对象
    old_image.buildDrawingCache();
    mBitmap = DrawingCache();
    mBitmap = ((BitmapDrawable) Drawable()).getBitmap();
    //这两个数字是控制模糊度的