MediaPlayer播放音频文件

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1.播放应用内的文件：

音频存放位置：raw目录（注意：文件名必须符合变量命名规范）

实战：

创建： MediaPlayer mediaPlayer=MediaPlayer.create(context,R.raw.文件);

判断音频是否播放：mediaPlayer.isPlay()

播放：mediaPlayer.start();

暂停：mediaPlayer.pause();

音乐时间：mediaPlayer.getDuration();

音乐当前播放位置：mediaPlayer.getCurrentPosition();

在某个位置播放：mediaPlayer.seekTo();

播放完成事件：mediaPlayer.setOnCompletionListener()

停止：mediaPlayer.stop();

释放内存:mediaPlayer.release();

2.播放内存卡的文件：

创建：MediaPlayer media=new MediaPlayer();

播放类型：media.setAudioStreamType(AudioManager.STREAM_MUISC);

设置音源：media.setDataSourse(context,Uri); Uri.parse("file://mnt/sdcard/音乐路径");

异步准备：media.setprepate();

开始播放：media.start();

3.播放Internet上的音频文件：

音频存放文件位置：网络

注意：添加网络权限

创建：MediaPlayer media=new MediaPlayer();

播放类型：media.setAudioStreamType(AudioManager.STREAM_MUISC);

设置音源：media.setDataSourse(context,Uri); Uri.parse("网络音乐文件路径");

异步准备：media.setprepateAsync();

监听：media.setOnPreparedListener();

设置缓冲监听器：media.setOnBufferingUpadateListener

代码实现：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"          package="com.zking.musicplayer">    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"></uses-permission>    <uses-permission android:name="android.permission.INTERNET"></uses-permission>    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:roundIcon="@mipmap/ic_launcher_round"        android:supportsRtl="true"        android:theme="@style/AppTheme">        <activity android:name=".MainActivity">            <intent-filter>                <action android:name="android.intent.action.MAIN"/>                <category android:name="android.intent.category.LAUNCHER"/>            </intent-filter>        </activity>    </application></manifest>

<?xml version="1.0" encoding="utf-8"?><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="com.zking.musicplayer.MainActivity">    <SeekBar        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:id="@+id/main_seekBar"/>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:gravity="center">        <ImageButton            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:id="@+id/ic_media_previous"            android:src="@android:drawable/ic_media_previous"            android:onClick="operation"/>        <ImageButton            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:src="@android:drawable/ic_media_play"            android:id="@+id/ic_media_play"            android:onClick="operation"/>        <ImageButton            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:id="@+id/ic_media_next"            android:src="@android:drawable/ic_media_next"            android:onClick="operation"/>    </LinearLayout></LinearLayout>

package com.zking.musicplayer;import android.media.AudioManager;import android.media.MediaPlayer;import android.net.Uri;import android.os.Environment;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.ImageButton;import android.widget.SeekBar;import java.io.IOException;public class MainActivity extends AppCompatActivity {    private MediaPlayer mediaPlayer;    private SeekBar main_seekBar;    private Uri uri;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        main_seekBar = (SeekBar) findViewById(R.id.main_seekBar);        main_seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {            @Override            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {            }            @Override            public void onStartTrackingTouch(SeekBar seekBar) {            }            @Override            public void onStopTrackingTouch(SeekBar seekBar) {                    //拖动播放                int current=seekBar.getProgress();                //跳到某个位置播放                mediaPlayer.seekTo(current);            }        });    }    public void operation(View view){        ImageButton imageButton= (ImageButton) view;        switch (view.getId()) {            case R.id.ic_media_play:                if(mediaPlayer==null){                    //mediaPlayer = MediaPlayer.create(this,R.raw.s1 );                   if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){                       String path=Environment.getExternalStorageDirectory().getAbsolutePath();                       Log.i("test","音乐路径："+path);                       mediaPlayer=new MediaPlayer();                       //设置音频流的类型                       mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);                       //设置音频的来源                       //uri = Uri.parse("file://"+path+"/一剪梅-费玉清-1769402673-0.mp3");                         uri=Uri.parse("http://172.27.35.1:8080/s1.mp3");                       Log.i("test","访问路径"+uri);                       try {                           mediaPlayer.setDataSource(this,uri);                           //异步准备                           //mediaPlayer.prepare();                           mediaPlayer.prepareAsync();                       } catch (IOException e) {                           e.printStackTrace();                       }                   }                    mediaPlayer.start();                    //改变图标                    imageButton.setImageResource(android.R.drawable.ic_media_pause);                    //获取音乐的播放时间                    int time=mediaPlayer.getDuration();                    main_seekBar.setMax(time);                    new MyThreed().start();                }else if(mediaPlayer.isPlaying()){                    //暂停                    mediaPlayer.pause();                    imageButton.setImageResource(android.R.drawable.ic_media_play);                }else{                    mediaPlayer.start();                    //改变图标                    imageButton.setImageResource(android.R.drawable.ic_media_pause);                }                break;            case R.id.ic_media_previous:                break;            case R.id.ic_media_next:                break;        }    }    class MyThreed extends Thread{        @Override        public void run() {            super.run();            while(main_seekBar.getProgress()<main_seekBar.getMax()){                //获取音乐                int current=mediaPlayer.getCurrentPosition();                main_seekBar.setProgress(current);            }        }    }}

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