title: Android countDownTimer only works once
body: <p>I am new in android studio. I am trying to make a voice recorder app that can automatically record for 10 seconds once the record button is clicked. I did that using a countdown timer. However, the countdown timer only works for the first time. The recorder does not stop automatically when I try to record for the second time. I can't seem to find problem.</p>
  
  <pre><code>import android.media.MediaPlayer;
  import android.media.MediaRecorder;
  
  import android.os.CountDownTimer;
  import android.os.Environment;
  import android.support.v7.app.AppCompatActivity;
  
  import android.os.Bundle;
  import android.view.View;
  
  import android.widget.Button;
  import android.widget.Toast;
  
  import java.io.IOException;
  import java.util.Random;
  
  import static android.Manifest.permission.RECORD_AUDIO;
  import static android.Manifest.permission.WRITE_EXTERNAL_STORAGE;
  
  import android.support.v4.app.ActivityCompat;
  import android.content.pm.PackageManager;
  import android.support.v4.content.ContextCompat;
  
  public class MainActivity extends AppCompatActivity {
  
  Button buttonStart,  buttonPlayLastRecordAudio ;
  String AudioSavePathInDevice = null;
  MediaRecorder mediaRecorder ;
  Random random ;
  String RandomAudioFileName = "ABCDEFGHIJKLMNOP";
  public static final int RequestPermissionCode = 1;
  MediaPlayer mediaPlayer ;
  CountDownTimer countDownTimer;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
  
      buttonStart = (Button) findViewById(R.id.button);
      buttonPlayLastRecordAudio = (Button) findViewById(R.id.button3);
  
      buttonPlayLastRecordAudio.setEnabled(false);
  
      random = new Random();
  
      buttonStart.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View view) {
  
              if (checkPermission()) {
  
                  AudioSavePathInDevice =
                          Environment.getExternalStorageDirectory().getAbsolutePath() + "/" +
                                  CreateRandomAudioFileName(5) + "AudioRecording.3gp";
  
                  MediaRecorderReady();
  
                  try {
                      mediaRecorder.prepare();
                      mediaRecorder.start();
                  } catch (IllegalStateException e) {
                      // TODO Auto-generated catch block
                      e.printStackTrace();
                  } catch (IOException e) {
                      // TODO Auto-generated catch block
                      e.printStackTrace();
                  }
  
                  buttonStart.setEnabled(true);
                  buttonPlayLastRecordAudio.setEnabled(true);
  
                  Toast.makeText(MainActivity.this, "Recording started",
                          Toast.LENGTH_LONG).show();
              } else {
                  requestPermission();
              }
          }
      });
  
  
      buttonPlayLastRecordAudio.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View view) throws IllegalArgumentException,
                          SecurityException, IllegalStateException {
  
              mediaPlayer = new MediaPlayer();
              try {
                  mediaPlayer.setDataSource(AudioSavePathInDevice);
                  mediaPlayer.prepare();
              } catch (IOException e) {
                          e.printStackTrace();
              }
  
              mediaPlayer.start();
              Toast.makeText(MainActivity.this, "Recording Playing",
                              Toast.LENGTH_LONG).show();
  
          }
      });
  
      CountDownTimer countDowntimer = new CountDownTimer(5000, 10000) {
          public void onTick(long millisUntilFinished) {
          }
  
          public void onFinish() {
              Toast.makeText(MainActivity.this, "Stop recording Automatically ", Toast.LENGTH_LONG).show();
              mediaRecorder.stop();
              buttonStart.setEnabled(true);
  
          }
      };countDowntimer.start();
  
  }
  
  public void MediaRecorderReady(){
      mediaRecorder=new MediaRecorder();
      mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
      mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
      mediaRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);
      mediaRecorder.setOutputFile(AudioSavePathInDevice);
  }
  
  public String CreateRandomAudioFileName(int string){
      StringBuilder stringBuilder = new StringBuilder( string );
      int i = 0 ;
      while(i &lt; string ) {
          stringBuilder.append(RandomAudioFileName.
                  charAt(random.nextInt(RandomAudioFileName.length())));
  
          i++ ;
      }
      return stringBuilder.toString();
  }
  
  private void requestPermission() {
      ActivityCompat.requestPermissions(MainActivity.this, new
              String[]{WRITE_EXTERNAL_STORAGE, RECORD_AUDIO}, RequestPermissionCode);
  }
  
  @Override
  public void onRequestPermissionsResult(int requestCode,
                                         String permissions[], int[] grantResults) {
      switch (requestCode) {
          case RequestPermissionCode:
              if (grantResults.length&gt; 0) {
                  boolean StoragePermission = grantResults[0] ==
                          PackageManager.PERMISSION_GRANTED;
                  boolean RecordPermission = grantResults[1] ==
                          PackageManager.PERMISSION_GRANTED;
  
                  if (StoragePermission &amp;&amp; RecordPermission) {
                      Toast.makeText(MainActivity.this, "Permission Granted",
                              Toast.LENGTH_LONG).show();
                  } else {
                      Toast.makeText(MainActivity.this,"Permission Denied",Toast.LENGTH_LONG).show();
                  }
              }
              break;
      }
  }
  
  public boolean checkPermission() {
      int result = ContextCompat.checkSelfPermission(getApplicationContext(),
              WRITE_EXTERNAL_STORAGE);
      int result1 = ContextCompat.checkSelfPermission(getApplicationContext(),
              RECORD_AUDIO);
      return result == PackageManager.PERMISSION_GRANTED &amp;&amp;
              result1 == PackageManager.PERMISSION_GRANTED;
  }
  }
  </code></pre>