How to know when MediaRecorder has finished writing data to file

Question

We\'re using MediaRecorder to record video to a file on the external storage using setOutputFile() before doing the actual recording.

Everything works fine, but the main

Answer 1

The FileObserver class suits your needs perfectly. Here is the documentation. It's easy to use. When a observed file is closed after writing, the onEvent callback is called with CLOSE_WRITE as the parameter.

MyFileObserver fb = new MyFileObserver(mediaFile_path, FileObserver.CLOSE_WRITE);
fb.startWatching();

class MyFileObserver extends FileObserver {

    public MyFileObserver (String path, int mask) {
        super(path, mask);
    }

    public void onEvent(int event, String path) {
        // start playing
    }
}

Don't forget to call stopWatching().