安卓使用MediaPlayer播放asset目录下的音乐MP3和raw目录下的音乐MP3

效果

代码

package com.javen.devicemange.CrazyOne.broadcast;

import android.content.res.AssetFileDescriptor;
import android.content.res.AssetManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;

import com.javen.devicemange.R;

import java.io.IOException;

/**
 * Created by Administrator on 2017/2/23 0023.
 * 使用MediaPlayer播放asset目录下的音乐MP3和raw目录下的音乐MP3
 */

public class MusicBox extends AppCompatActivity implements View.OnClickListener {
    private Button openAssetMusic;
    private AssetManager assetManager;
    private MediaPlayer mediaPlayer;
    private Button pause;
    private Button openRawMusic;
    private Button pauseRawMusic;
    private MediaPlayer mediaPlayer1;


    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.musicbox);
        initView();
    }

    private void initView() {
        openAssetMusic = (Button) findViewById(R.id.openAssetMusic);

        openAssetMusic.setOnClickListener(this);
        pause = (Button) findViewById(R.id.pause);
        pause.setOnClickListener(this);
        openRawMusic = (Button) findViewById(R.id.openRawMusic);
        openRawMusic.setOnClickListener(this);
        pauseRawMusic = (Button) findViewById(R.id.pauseRawMusic);
        pauseRawMusic.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.openAssetMusic:
                //开始播放
                openAssetMusics();
                break;
            case R.id.pause:
                //暂停播放
                mediaPlayer.pause();
                break;
            case R.id.openRawMusic:
                //开始播放
                openRawMusicS();
                break;
            case R.id.pauseRawMusic:
                //暂停播放
                mediaPlayer1.pause();
                break;
        }
    }

    /**
     * 打开raw目录下的音乐mp3文件
     */
    private void openRawMusicS() {
        mediaPlayer1 = MediaPlayer.create(this, R.raw.raw_mp3);
        //用prepare方法，会报错误java.lang.IllegalStateExceptio
        //mediaPlayer1.prepare();
        mediaPlayer1.start();
    }

    /**
     * 打开assets下的音乐mp3文件
     */
    private void openAssetMusics() {
        //打开Asset目录
        assetManager = getAssets();
        mediaPlayer = new MediaPlayer();
        try {
            //打开音乐文件shot.mp3
            AssetFileDescriptor assetFileDescriptor = assetManager.openFd("shot.mp3");
            mediaPlayer.reset();
            //设置媒体播放器的数据资源
            mediaPlayer.setDataSource(assetFileDescriptor.getFileDescriptor(), assetFileDescriptor.getStartOffset(), assetFileDescriptor.getLength());
            mediaPlayer.prepare();
            mediaPlayer.start();
        } catch (IOException e) {
            e.printStackTrace();
            Log.d("GsonUtils", "IOException" + e.toString());
        }
    }
}

raw目录

assets目录

布局xml

xml version="1.0" encoding="utf-8"?>
xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="match_parent"
              android:layout_height="match_parent">

            android:text="打开assets下的音乐mp3文件"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/openAssetMusic"/>

            android:text="暂停"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/pause"/>
            android:text="打开raw目录下的音乐mp3文件"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/openRawMusic"/>
            android:text="暂停raw目录下的音乐mp3文件"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/pauseRawMusic"/>

。。。