How to programmatically take a screenshot in Android? -- http://www.bulentsiyah.com/how-to-programmatically-take-a-screenshot-in-android/

MainActivity.java

How to programmatically take a screenshot in Android?

Reference: http://stackoverflow.com/a/5651242

Here is the code that allowed my screenshot to be stored on sd card and used later for whatever your needs are:

First, add proper permission to save file:

And this is the code (running in an Activity):
private void takeScreenshot() { Date now = new Date(); android.text.format.DateFormat.format("yyyy-MM-dd_hh:mm:ss", now);

try {
    // image naming and path  to include sd card  appending name you choose for file
    String mPath = Environment.getExternalStorageDirectory().toString() + "/" + now + ".jpg";

    // create bitmap screen capture
    View v1 = getWindow().getDecorView().getRootView();
    v1.setDrawingCacheEnabled(true);
    Bitmap bitmap = Bitmap.createBitmap(v1.getDrawingCache());
    v1.setDrawingCacheEnabled(false);

    File imageFile = new File(mPath);

    FileOutputStream outputStream = new FileOutputStream(imageFile);
    int quality = 100;
    bitmap.compress(Bitmap.CompressFormat.JPEG, quality, outputStream);
    outputStream.flush();
    outputStream.close();

    openScreenshot(imageFile);
} catch (Throwable e) {
    // Several error may come out with file handling or OOM
    e.printStackTrace();
}
}