How do I export Point Cloud Data (Project Tango)?

Question

Just got a Project Tango Development Kit tablet and have worked through some of the demos and examples.

Some older blog posts use the log files from a "Tango Map

Answer 1

Thank you Mark for your advice. I am a novice programmer and it is my first time working with java... I am interested in exporting the Tango acquired PointCloud data to a file and I would like to ask for your feedback on my approach (I created a Save button, and onClick the data would be saved to a file on an external drive). Please find the code bellow for the part that should save the xyzIj data:

@Override
public void onClick(View v) {
    switch (v.getId()) {
    ...
        case R.id.save_button:
            savePointCloud();
            break;
        default:
            Log.w(TAG, "Unrecognized button click.");
        }
}


private static void savePointCloud(final TangoXyzIjData xyzIj, String file) {
    File directoryName =  getAlbumStorageDir(file);
    FileOutputStream out = new FileOutputStream(directoryName,"text.txt");
    byte[] buffer = new byte[xyzIj.xyzCount * 3 * 4];
    FileInputStream fileStream = new FileInputStream(
            xyzIj.xyzParcelFileDescriptor.getFileDescriptor());
    int read;
       while ((read=fileStream.read(buffer))!=1){
           try{
           out.write(buffer, 0, read);
           out.close();
           System.out.println("Printed to file");
       }catch(IOException e){e.printStackTrace();}
       }
}

public File getAlbumStorageDir(String dirName) {
    if (!isExternalStorageWritable()) {
        return null;
    } else {
        // Get the directory for the user's public downloads directory.
        File file = new File(Environment.getExternalStoragePublicDirectory(
                Environment.DIRECTORY_DOWNLOADS), dirName);
        if (!file.mkdirs() || !file.exists()) {
            Log.e(TAG, "Directory not created");
            return null;
        }
        return file;
    }
}

public boolean isExternalStorageWritable() {
    String state = Environment.getExternalStorageState();
    if ((Environment.MEDIA_MOUNTED.equals(state)
            && Environment.MEDIA_MOUNTED_READ_ONLY.equals(state))) {
        return true;
    } else {
        Log.e(TAG, "External storage is not mounted READ/WRITE.");
        return false;
    }
}