下载后无法查找图像

Question

我使用此代码下载图像

public void buttonCondivisione(View view) {
    //onShareItem(view);
    String url = Utilities.removeString(mImages[POSITION_IMAGE].getLink());
    new DownloadImage().execute(url);
}

private class DownloadImage extends AsyncTask<String, Void, Bitmap> {
    private String TAG = "DownloadImage";
    private Bitmap downloadImageBitmap(String sUrl) {
        Bitmap bitmap = null;
        try {
            InputStream inputStream = new URL(sUrl).openStream();   // Download Image from URL
            bitmap = BitmapFactory.decodeStream(inputStream);       // Decode Bitmap
            inputStream.close();
        } catch (Exception e) {
            Log.d(TAG, "Exception 1, Something went wrong!");
            e.printStackTrace();
        }
        return bitmap;
    }

    @Override
    protected Bitmap doInBackground(String... params) {
        return downloadImageBitmap(params[0]);
    }

    protected void onPostExecute(Bitmap result) {
        saveImage(getApplicationContext(), result, "my_image.png");
    }
}

public void saveImage(Context context, Bitmap b, String imageName) {
    FileOutputStream foStream;
    try {
        foStream = context.openFileOutput(imageName, Context.MODE_PRIVATE);
        b.compress(Bitmap.CompressFormat.PNG, 100, foStream);
        foStream.close();
        Toast.makeText(CategoryActivity.this, "FATTO", Toast.LENGTH_SHORT).show();
    } catch (Exception e) {
        Log.d("6SENSE_APP Save Image", "Exception 2, Something went wrong!");
        Toast.makeText(CategoryActivity.this, "No FATTO", Toast.LENGTH_SHORT).show();
        e.printStackTrace();
    }
}

但我无法在下载后找到图片。一切都好，因为我在几秒钟后看到Toast消息。我尝试不同的方式下载我的图像，但每种方法都不适合我。 Stackoverflow是我的最后一次机会。