TensorFlow Android App Debugging (2) -- Dump Out Image/Text Files

During Android app debugging, dumping out data from Android to PC to crucial for the following analysis process. In the previous post, we said that Android logging function is a useful tool. But sometime logging only is not sufficient. For example, to save information of an image by logging is time-consuming, prone to packet loss and unproductive. A better way is to save the image into internal memory. In this post, we provided some examples of how to save images and text files in Android.

To save images (modified from the codes found here). bitmap is saved into .JPEG image files with lossless compression.

    // Save bitmap
    String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
    OutputStream outStream = null;
    File file = new File(extStorageDirectory, "/DCIM/bitmap"+fileNo+".JPEG");
    try {
      outStream = new FileOutputStream(file);
      bitmap.compress(Bitmap.CompressFormat.JPEG, 100, outStream);
      outStream.flush();
      outStream.close();
    } catch(Exception e) {

    }

To save text files (modified from function found here)

  private void writeToFile(String content, final String filename) {
    try {
      File file = new File(Environment.getExternalStorageDirectory() + "/DCIM/" + filename);
      //File file = new File("/DCIM/test.txt");

      Log.i(TAG, Environment.getExternalStorageDirectory() + "/DCIM/" + filename);
      if (!file.exists()) {
        file.createNewFile();
      }
      FileWriter writer = new FileWriter(file);
      writer.append(content);
      writer.flush();
      writer.close();
    } catch (IOException e) {
    }
  }