相关疑难解决方法(0)

当我的应用程序安装并在后台运行200毫秒时,我需要以编程方式截取Android设备或模拟器,并将图像保存在我的计算机中.我已使用下面的代码实现了此过程,仅在我的应用程序位于前台时才有效.当我的应用程序也在后台时,我想截取屏幕截图.以下是我的代码:

public static Bitmap takeScreenshot(Activity activity, int ResourceID) { 
    Random r = new Random();
    int iterator=r.nextInt();   
     String mPath = Environment.getExternalStorageDirectory().toString() + "/screenshots/";
    View v1 = activity.getWindow().getDecorView().findViewById(ResourceID);
    v1.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 
            MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
    v1.layout(0, 0, v1.getMeasuredWidth(), v1.getMeasuredHeight()); 
    v1.setDrawingCacheEnabled(true);
    final Bitmap bitmap = Bitmap.createBitmap(v1.getDrawingCache());
    Bitmap resultBitmap = Bitmap.createScaledBitmap(bitmap, 640, 480, false);
    v1.setDrawingCacheEnabled(false);
    File imageFile = new File(mPath);
    imageFile.mkdirs();
    imageFile = new File(imageFile+"/"+iterator+"_screenshot.png");
    try {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        resultBitmap.compress(CompressFormat.PNG, 100, bos);
        byte[] bitmapdata = bos.toByteArray();

        //write the bytes in file
        FileOutputStream fos = …