音乐播放器

来源：互联网发布：淘宝账户怎么注销编辑：程序博客网时间：2024/05/16 11:46

package com.qq.music;

import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.app.Activity;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {
   private EditText path;
   private MediaPlayer mediaPlayer;// API
   private Button pause;
   private String mediapath;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
       path = (EditText) findViewById(R.id.path);
       pause = (Button) findViewById(R.id.button2);
   }

   public void play(View view) {
       mediapath = path.getText().toString().trim();
       if (TextUtils.isEmpty(mediapath)) {
           Toast.makeText(this, "音频路径不能为空", 0).show();
       } else {
           //真实的项目播放停止逻辑都是写在后台的服务里面
           try {
               //mediaplayer 中的方法开启了子线程
               //初始化mediaplayer
               mediaPlayer = new MediaPlayer();
               //设置播放的一些初始化参数
               //设置声音流的类型不同类型开辟内存不同
               mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
               //设置数据源
               mediaPlayer.setDataSource(mediapath);
               //准备播放音乐
               mediaPlayer.prepare();
               //开始播放音乐
               mediaPlayer.start();
           } catch (Exception e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
               Toast.makeText(this, "播放失败，可能文件类型不支持", 0).show();

           }
       }

   }

   public void pause(View view) {
       if ("继续".equals(pause.getText().toString())) {
           mediaPlayer.start();
           pause.setText("暂停");
           return;
       }
       if (mediaPlayer != null && mediaPlayer.isPlaying()) {
           mediaPlayer.pause();
           pause.setText("继续");

       }

   }

   public void replay(View view) {
       if (mediaPlayer != null && mediaPlayer.isPlaying()) {
           mediaPlayer.seekTo(0);
           return;
       }
       if (mediaPlayer!=null) {
           mediaPlayer.seekTo(0);//从头开始时间的毫秒值    快进快退
           mediaPlayer.start();
           pause.setText("暂停");

       }

   }

   public void stop(View view) {
       mediaPlayer.stop();
       mediaPlayer.release();
       mediaPlayer = null;
       pause.setText("暂停");

   }

}

重要的回调函数

mediaPlayer.setOnErrorListenner(Listener) 播放失败的回调

mediaPlayer.setOnCompletionListener(Listener)播放完毕的回调

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