Using Button to control MediaPlayer

 


package app.test;

import android.app.Activity;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.widget.Button;

public class Test extends Activity implements
    OnCompletionListener, OnTouchListener, OnClickListener {

  MediaPlayer mediaPlayer;
  View theView;
  Button stopButton, startButton;

  int position = 0;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    stopButton = (Button) this.findViewById(R.id.StopButton);
    startButton = (Button) this.findViewById(R.id.StartButton);

    startButton.setOnClickListener(this);
    stopButton.setOnClickListener(this);

    theView = this.findViewById(R.id.theview);

    theView.setOnTouchListener(this);

    mediaPlayer = MediaPlayer.create(this, R.raw.a);//raw/a.mp3
    mediaPlayer.setOnCompletionListener(this);
    mediaPlayer.start();
  }

  public void onCompletion(MediaPlayer mp) {
    mediaPlayer.start();
    mediaPlayer.seekTo(position);
  }

  public boolean onTouch(View v, MotionEvent me) {

    if (me.getAction() == MotionEvent.ACTION_MOVE) {
      if (mediaPlayer.isPlaying()) {
        position = (int) (me.getX() * mediaPlayer.getDuration() / theView
            .getWidth());
        Log.v("SEEK", "" + position);
        mediaPlayer.seekTo(position);
      }
    }

    return true;
  }

  public void onClick(View v) {
    if (v == stopButton) {
      mediaPlayer.pause();
    } else if (v == startButton) {
      mediaPlayer.start();
    }

  }
}


//main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<Button android:text="Start" android:id="@+id/StartButton" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
<Button android:text="Stop" android:id="@+id/StopButton" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
<View android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/theview" />
</LinearLayout>

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Using Button to control MediaPlayer : Button « UI « Android

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