获取View的截图-将View转换为Bitmap对象

开发中,有时候需要获取View的截图来做动画来达到动画流程的目的

原理:将View的内容画到一个Bitmap画布上,然后取出

下面封装了一个从View生成Bitmap的工具类

/**
 * 将View转换为Bitmap对象
 */
public class ViewToBitmapUtil {

    private static final String TAG = "ViewToBitmapUtil";

    public static Bitmap convertViewToBitmap(View view) {
        view.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 
            MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)); view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight()); view.buildDrawingCache(); Bitmap bitmap = view.getDrawingCache();
     // 或者可以使用下面的方法
     // view.setDrawingCacheEnabled(true);
     // Bitmap bmp = Bitmap.createBitmap(view.getDrawingCache());

 

     return bitmap;
    }

    public static Bitmap convertViewToBitmap(View view, int bitmapWidth, int bitmapHeight) {
        Bitmap bitmap = Bitmap.createBitmap(bitmapWidth, bitmapHeight, Bitmap.Config.ARGB_8888);
        view.draw(new Canvas(bitmap));
        return bitmap;
    }

    public static void getScreenRectOfView(View view, Rect outRect) {
        int pos[] = new int[2];
        view.getLocationOnScreen(pos);
        outRect.set(pos[0], pos[1], pos[0] + view.getWidth(), pos[1] + view.getHeight());
    }
}

 

posted @ 2016-03-23 15:30  popfisher  阅读(2229)  评论(0编辑  收藏  举报