/**
 * 截圖方法
* @return
*/
private Bitmap shot() {
    View view = getWindow().getDecorView();
    Display display = this.getWindowManager().getDefaultDisplay();
    view.setDrawingCacheEnabled(true);//允許當前視窗儲存快取資訊，這樣getDrawingCache()方法才會返回一個Bitmap
Bitmap screenBmp = Bitmap.createBitmap(view.getDrawingCache());
    return 
 
screenBmp;
}

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