How to capture everything currently on screen incl

问题:

I have looked at probably every SO article concering capturing the screen (screenshot, screendump) programmatically on Android, and they usually all end up with the same answer.

The problem with it is that it captures the View that you have specified, but it does NOT capture any Dialogs that may be "on top of" the "root view". This is the code I use, that fails to capture anything "on top":

Bitmap bitmap;
View v1 = findViewById(android.R.id.content);
v1.setDrawingCacheEnabled(true);
bitmap = Bitmap.createBitmap(v1.getDrawingCache());
v1.setDrawingCacheEnabled(false);
File path = Environment.getExternalStorageDirectory();
File file = new File(path, "myDump.jpg");

FileOutputStream outputStream;

try 
{
    outputStream = new FileOutputStream(file);
    bitmap.compress(Bitmap.CompressFormat.JPEG, 10, outputStream);
    outputStream.flush();
    outputStream.close();
} 

catch (Exception e) 
{
  e.printStackTrace();
}

The question is: how can I capture the entire screen, including Dialogs that are on top? I am only interested in capturing the app that I am writing, not the home screen or anything like that, just anything that is on top of my root view.

I did read something about rooting, but I really hope that taking a complete screendump of the app Im writing cannot be impossible.

回答1:

use this library .... it works great for me. https://github.com/jraska/Falcon

  // Saving screenshot to file
            Falcon.takeScreenshot(this, imageFile);
            // Take bitmap and do whatever you want
            Bitmap bitmap = Falcon.takeScreenshotBitmap(this);

回答2:

This is working inside an opened DialogFragment.

View v1 = ((ViewGroup) (((MyActivity)getActivity()).findViewById(android.R.id.content)));
v1.setDrawingCacheEnabled(true);
Bitmap bitmapParent = Bitmap.createBitmap(v1.getDrawingCache());
v1.setDrawingCacheEnabled(false);

// dialogView is the inflated view of the DialogFragment
dialogView.setDrawingCacheEnabled(true);
Bitmap bitmapDialog = Bitmap.createBitmap(dialogView.getDrawingCache());
dialogView.setDrawingCacheEnabled(false);

Canvas canvas = new Canvas(bitmapParent);
Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG);
canvas.drawBitmap(bitmapDialog, 0, 0, paint);   

// Activity and dialog captured!!
bitmapParent.compress(Bitmap.CompressFormat.PNG, 100, new FileOutputStream(new File(directory, name)));

回答3:

It is possible, you need to draw all view roots to the bitmap. Try out this library: https://github.com/jraska/Falcon it can capture Dailogs to your screenshot.