Android中的屏幕截图

Question

I want to develop an application that will take screenshot of android screen..does any one know how to do it..? which is similar to koushik duttas screen shot..But with out using root..and does any one had koushik dutta screenshot application which is working..? is not working for me..please let me know..thanks in advance.

Answer 1

Let's say that you clicked on a button:

findViewById(R.id.button1).setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
       Bitmap bitmap = takeScreenshot();
       saveBitmap(bitmap);
   }
});

After that you need these two methods:

public Bitmap takeScreenshot() {
   View rootView = findViewById(android.R.id.content).getRootView();
   rootView.setDrawingCacheEnabled(true);
   return rootView.getDrawingCache();
}

 public void saveBitmap(Bitmap bitmap) {
    File imagePath = new File(Environment.getExternalStorageDirectory() + "/screenshot.png");
    FileOutputStream fos;
    try {
        fos = new FileOutputStream(imagePath);
        bitmap.compress(CompressFormat.PNG, 100, fos);
        fos.flush();
        fos.close();
    } catch (FileNotFoundException e) {
        Log.e("GREC", e.getMessage(), e);
    } catch (IOException e) {
        Log.e("GREC", e.getMessage(), e);
    }
}

Answer 2

You can try something like this

private RelativeLayout view;

public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    view = (RelativeLayout)findViewById(R.id.relativeView);

    View v1 = view.getRootView();

    v1.setDrawingCacheEnabled(true);
    Bitmap bm = v1.getDrawingCache();
}

Answer 3

The method view.getDrawingCache() will first attempt to retrieve an image it has previously cached. This can cause issues if you want to guarantee your screenshot is up-to-date. For instance, if your user clicks your screenshot button, then changes the UI, then clicks it again, the second screenshot will be identical to the first unless you wipe the cache. I find the following method more convenient:

public Bitmap takeScreenshot() {
  View rootView = findViewById(android.R.id.content).getRootView();
  Bitmap bitmap = Bitmap.createBitmap(rootView.getWidth(), rootView.getHeight(), Bitmap.Config.ARGB_8888);
  Canvas canvas = new Canvas(bitmap);
  rootView.draw(canvas);
  return bitmap;
}

Answer 4

I think it is impossible without root or the SDK, sorry.

I would love to be proven wrong.

Not an app, but if you have a USB cable, you can install the Android SDK on a PC and take screenshots from the PC with androidscreencast , without having to root your phone.