java.lang.IllegalStateException at android.media.MediaRecorder.start(Native Method)

Question

I want to make a voice recorder app but it crashes when i click the \"Start Recording\" button. I get an error saying java.lang.IllegalStateException at android.media.Media

Answer 1

Call this after setOutFormat() but before prepare().

this is just what my android studio docs dialog says while i write this method name. the point is that you should call this method just before prepare().
here is an example:

private void startRecording() {
    mediaRecorder = new MediaRecorder();
    mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
    mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
    File outputFolder = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/MediaMaster/Dub/");
    Log.i(TAG, "startRecording: creating output file " + outputFolder.mkdirs());
    File output = new File(outputFolder.getAbsolutePath()+"out" + new Date().getTime() + ".3gpp");
    mediaRecorder.setOutputFile(output.getAbsolutePath());
    mediaRecorder.setMaxDuration(3000);
    try {
        mediaRecorder.prepare();
    } catch (IOException e) {
        Log.e(TAG, "startRecording: ", e);
    }
    mediaRecorder.start();
}