无法使用Android Espresso TestFramework获取屏幕截图

Question

获取以下路径但无法访问屏幕截图，任何想法？

Brings up path : /storage/emulated/0/test-screenshots/screenshot-001.png

使用方法时：

尝试使用Android Espresso中的以下方法捕获屏幕截图：

takeScreenshot("screenshot-001", getActivity()); 

public static void takeScreenshot(String name, Activity activity)
   {
    // In Testdroid Cloud, taken screenshots are always stored
    // under /test-screenshots/ folder and this ensures those screenshots
    // be shown under Test Results
    String path = Environment.getExternalStorageDirectory()+ "/test-screenshots/" + name + ".png";
    Log.d("Logs", "Image Path is " + path);
    View scrView = activity.getWindow().getDecorView().getRootView();
    scrView.setDrawingCacheEnabled(true);
    Bitmap bitmap = Bitmap.createBitmap(scrView.getDrawingCache());
    scrView.setDrawingCacheEnabled(false);

    OutputStream out = null;
    File imageFile = new File(path);

    try {
        out = new FileOutputStream(imageFile);
        bitmap.compress(Bitmap.CompressFormat.PNG, 90, out);
        out.flush();
    } catch (java.io.FileNotFoundException e) {
        // exception
    } catch (java.io.IOException e) {
        // exception
    } finally {

        try {
            if (out != null) {
                out.close();
            }

        } catch (Exception exc) {
        }

    }
}