为简单音频播放对MediaPlayer的简单封装

目前只有简单音频播放需求，暂时封装到这样，以后需求变了，再扩展吧

类：

import android.media.AudioManager;
import android.media.MediaPlayer;
import android.support.annotation.FloatRange;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.util.Log;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import static com.xhzxlqt.util.LeesAudioPlayer.Status.STATUS_COMPLETE;
import static com.xhzxlqt.util.LeesAudioPlayer.Status.STATUS_ERROR;
import static com.xhzxlqt.util.LeesAudioPlayer.Status.STATUS_NULL;
import static com.xhzxlqt.util.LeesAudioPlayer.Status.STATUS_PAUSE;
import static com.xhzxlqt.util.LeesAudioPlayer.Status.STATUS_PLAYING;
import static com.xhzxlqt.util.LeesAudioPlayer.Status.STATUS_READY;
import static com.xhzxlqt.util.LeesAudioPlayer.Status.STATUS_STOP;

/*
 * @author [e-mail]
 * create at 2018/6/13
 * description:
 */
public class LeesAudioPlayer  {
    static String TAG="LeesAudioPlayerThread";
    MediaPlayer mPlayer=new MediaPlayer();
    LeesAudioPlayer _this;
    float   _Volume=0.5f;

    int _currentStatus=STATUS_NULL;

    //使用Map，而不使用固定变量，方便以后扩展Status
    private Map<Integer,OnStatusChangedListener> listenerMap=new HashMap<Integer,OnStatusChangedListener>();

    public LeesAudioPlayer(){
        _this=this;
        mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
        mPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {

            @Override
            public void onPrepared(MediaPlayer mp) {
                setCurrentStatus(STATUS_READY,mp.getDuration());
                //region
                mp.setVolume(_Volume,_Volume);
                mp.start();
                setCurrentStatus(STATUS_PLAYING,null);
                //endregion
            }

        });

        mPlayer.setOnErrorListener(new MediaPlayer.OnErrorListener() {
            @Override
            public boolean onError(MediaPlayer mp, int what, int extra) {
                if(mPlayer.isPlaying()) {
                    mPlayer.stop();
                    setCurrentStatus(STATUS_STOP,null);
                }
                setCurrentStatus(STATUS_ERROR,null);
                return false;
            }
        });

        mPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) {
                //region
                setCurrentStatus(STATUS_COMPLETE,null);
                //endregion
            }
        });
    }
    /*
     * 函数功能：播放音频文件
     * Author: [e-mail]
     * Create: 2018/6/13 20:11
     *
     */
    public void Play(String sFile) {
        try {
            if(mPlayer.isPlaying()){
                mPlayer.stop();
                setCurrentStatus(STATUS_STOP,null);
            }
            mPlayer.reset();
            mPlayer.setDataSource(sFile);
            mPlayer.prepareAsync();
        }
        catch (IOException e){
            Log.e(TAG,e.getMessage());
        }
    }
    /*
     * 函数功能：设置音量
     * Author: [e-mail]
     * Create: 2018/6/13 20:17
     *
     */
    public void setVolume(@FloatRange( from = 0.0f ,to =1.0f) float fVal){
        _Volume=fVal;
    }
    /*
     * 函数功能：暂停
     * Author: [e-mail]
     * Create: 2018/6/13 20:18
     *
     */
    public void Pause(){
        if(mPlayer.isPlaying()){
            setCurrentStatus(STATUS_PAUSE,null);
            mPlayer.pause();
        }
    }
    /*
     * 函数功能：恢复播放
     * Author: [e-mail]
     * Create: 2018/6/13 20:41
     *
     */
    public void Resume(){
        if(_currentStatus==STATUS_PAUSE) {
            setCurrentStatus(STATUS_PLAYING,null);
            mPlayer.start();
        }
    }

    /*
     * 函数功能：设置当前状态，同时调用相应的回调（如果有）
     * Author: [e-mail]
     * Create: 2018/6/13 20:46
     *
     */
    private void setCurrentStatus(int nVal,Object obj){
        _currentStatus=nVal;
        if(listenerMap.containsKey(nVal)){
            OnStatusChangedListener listener=listenerMap.get(nVal);
            if(listener!=null){
                listener.onStatusChanged(_this, nVal,obj);
            }
        }
    }


    public interface Status{
        public int STATUS_NULL=0;
        public int STATUS_READY=1;
        public int STATUS_PLAYING=2;
        public int STATUS_PAUSE=3;
        public int STATUS_COMPLETE=4;
        public int STATUS_STOP=5;
        public int STATUS_ERROR=9;
    }
    public interface OnStatusChangedListener{
        public void onStatusChanged(LeesAudioPlayer lapt, int status, @Nullable Object other);
    }
    public LeesAudioPlayer setStatusChangedListener(@NonNull int nStatus, OnStatusChangedListener listener){
        listenerMap.put(nStatus,listener);
        return this;
    }
    protected void finalize( )
    {
        if(mPlayer.isPlaying())
            mPlayer.stop();
        mPlayer.release();
        mPlayer=null;
    }
}

 

调用测试：

LeesAudioPlayer mPlayer=new LeesAudioPlayer();


mPlayer.setStatusChangedListener(LeesAudioPlayer.Status.STATUS_READY, new LeesAudioPlayer.OnStatusChangedListener() {
            @Override
            public void onStatusChanged(LeesAudioPlayer lapt, int status, @Nullable Object msg) {
                onPlayerStatusChanged(lapt,status,msg);
            }
        }).setStatusChangedListener(LeesAudioPlayer.Status.STATUS_COMPLETE, new LeesAudioPlayer.OnStatusChangedListener() {
            @Override
            public void onStatusChanged(LeesAudioPlayer lapt, int status, @Nullable Object msg) {
                onPlayerStatusChanged(lapt,status,msg);
            }
        }).setStatusChangedListener(LeesAudioPlayer.Status.STATUS_ERROR, new LeesAudioPlayer.OnStatusChangedListener() {
            @Override
            public void onStatusChanged(LeesAudioPlayer lapt, int status, @Nullable Object msg) {
                onPlayerStatusChanged(lapt,status,msg);
            }
        });
        btn1=(Button)findViewById(R.id.btn_1);
        btn2=(Button)findViewById(R.id.btn_2);
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mPlayer.Play("/storage/emulated/0/mp3/白狐_陈瑞_女人心.mp3");
            }
        });
        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mPlayer.Play("/storage/emulated/0/mp3/孙露-难舍难分.mp3");
            }
        });

........

private void onPlayerStatusChanged(LeesAudioPlayer lapt, int status, @Nullable Object msg){
        switch (status){
            case LeesAudioPlayer.Status.STATUS_READY:
                gifImageView.setImageResource(R.drawable.sound_play);
                break;
            case LeesAudioPlayer.Status.STATUS_COMPLETE:
                gifImageView.setImageResource(R.drawable.sound_stop);
                break;
            case LeesAudioPlayer.Status.STATUS_ERROR:
                gifImageView.setImageResource(R.drawable.sound_stop);
                break;
        }
    }