screenshot.java

public static void screenshot(View view, String path) throws Exception {
    Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);
    view.draw(canvas);

    File file = new File(path);
    file.mkdirs();
    file = new File(path, "screenshot_" + System.currentTimeMillis() + ".png");

    FileOutputStream fileOutputStream = new FileOutputStream(file);
    bitmap.compress(Bitmap.CompressFormat.PNG, 100, fileOutputStream);
    fileOutputStream.close();
    bitmap.recycle();
}

Android : save a View to a Bitmap