title: Android: Activity onResume
body: <p>I have two activities, homework and closer.  I have a song playing in homework but when a button is pressed, the media player pauses and closer is opened.  In my onResume function for homework, I'm trying to start the media player again but no sound plays.  Can anybody help me out with this?</p>
  
  <pre><code>package com.cis.lab4;
  
  import java.io.IOException;
  
  import android.media.MediaPlayer;
  import android.os.Bundle;
  import android.app.Activity;
  import android.content.Intent;
  import android.content.res.AssetFileDescriptor;
  import android.view.Menu;
  import android.view.View;
  import android.view.View.OnClickListener;
  import android.widget.Button;
  
  public class Homework extends Activity {
  
      final MediaPlayer mediaplayer = new MediaPlayer();
      int media_length;
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_homework);
  
          setContentView(R.layout.activity_homework);
          AssetFileDescriptor afd;
          try {
              afd = getAssets().openFd("rev.mp3");
              mediaplayer.setDataSource(afd.getFileDescriptor(),afd.getStartOffset(),afd.getLength());
              mediaplayer.prepare();
          } catch (IOException e) {
              e.printStackTrace();
          }
          mediaplayer.start();
          Button next = (Button) findViewById(R.id.homeworkContinue);
          final Intent openCloser = new Intent(this, EndActivity.class);
          next.setOnClickListener(new OnClickListener(){
  
              @Override
              public void onClick(View v) {
                  mediaplayer.pause();
                  media_length = mediaplayer.getCurrentPosition();
                  startActivity(openCloser);
  
              }
  
          });
      }
  
      public void onResume(Bundle savedInstanceState){
          super.onResume();
          mediaplayer.seekTo(media_length);
          mediaplayer.start();
      }
  
  
  }
  </code></pre>