android音乐播放器

需求描述: 拥有播放,暂停,重新播放和停止等功能。 并且随着音乐的进度,进图条会自动更新。手动拖动进度条也会更新音乐的进度。

效果展示

在这里插入图片描述

示例代码
  • MainActivity
package com.example.www.musicdemo;

import android.Manifest;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.media.MediaPlayer;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.SeekBar;

import java.io.IOException;

public class MainActivity extends AppCompatActivity {

    private Iservice mIservice;
    private static SeekBar mSeekBar;

    public static Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            //获取我们携带的数据
            Bundle data = msg.getData();
            //获取歌曲的总时长 和 当前进度
            int duration = data.getInt("duration");
            int currentPosition = data.getInt("currentPosition");

            mSeekBar.setMax(duration);
            mSeekBar.setProgress(currentPosition);
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
//        requestPermissions(new String[]{Manifest.permission.INTERNET}, 100);

        mSeekBar = (SeekBar) findViewById(R.id.seekBar);

        Intent intent = new Intent(this, MyService.class);
        startService(intent);

        bindService(intent, conn, BIND_AUTO_CREATE);
        // 设置seekbar的拖动时间监听
        mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                mIservice.callSeekTo(seekBar.getProgress());
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });

    }

    public void playmusic(View view) {
        mIservice.callPlayMusic();
    }

    public void onPause(View view) {
        mIservice.callPauseMusic();
    }

    public void stopMusci(View view) {
        mIservice.stopMusic();
    }

    public void replaymusic(View view) {
        mIservice.callRePlayMusic();
    }




    ServiceConnection conn = new ServiceConnection() {

        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            mIservice = (Iservice) service;
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {

        }
    };

    @Override
    protected void onDestroy() {
        unbindService(conn);
        super.onDestroy();
    }
}

  • MyService
package com.example.www.musicdemo;

import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Binder;
import android.os.Bundle;
import android.os.IBinder;
import android.os.Message;

import java.util.Timer;
import java.util.TimerTask;

public class MyService extends Service {

    private MediaPlayer mMp;

    public MyService() {
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.

        return new MyBinder();
    }

    @Override
    public void onCreate() {
        mMp = new MediaPlayer();

        super.onCreate();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
    }

    public void playMusic(){
        try {

            mMp.setDataSource("http://se.sycdn.kuwo.cn/resource/n1/77/39/2163816420.mp3");
            mMp.prepare();
            mMp.start();
            updateSeekBar();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    public void pauseMusic(){
        mMp.pause();
    }

    public void stopMusic(){
        mMp.stop();
    }

    public void updateSeekBar(){
        final int duration = mMp.getDuration();
        final Timer timer = new Timer();
        final TimerTask timerTask = new TimerTask() {
            @Override
            public void run() {
                int currentPosition = mMp.getCurrentPosition();

                Message msg = Message.obtain();
                Bundle bundle = new Bundle(); // map
                bundle.putInt("duration", duration);
                bundle.putInt("currentPosition", currentPosition);

                msg.setData(bundle);
                MainActivity.mHandler.sendMessage(msg);
            }
        };

        timer.schedule(timerTask, 100, 1000);
        // 监听音乐播放完毕
        mMp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) {
                System.out.println("歌曲播放完成了");
                timer.cancel();
                timerTask.cancel();
            }
        });

    }

    //实现指定播放的位置
    public void seekTo(int position){
        mMp.seekTo(position);
    }


    private class MyBinder extends Binder implements Iservice{

        @Override
        public void callPlayMusic() {
            playMusic();
        }

        @Override
        public void callPauseMusic() {
            pauseMusic();
        }

        @Override
        public void callRePlayMusic() {
            mMp.start();
        }

        @Override
        public void stopMusic() {
            MyService.this.stopMusic();
        }

        @Override
        public void callSeekTo(int position) {

            seekTo(position);
        }

    }
}

  • Iservice
package com.example.www.musicdemo;

/**
 * @author Administrator
 * @name mutilMedia
 * @class name:com.example.www.musicdemo
 * @class describe
 * @time 2019/4/8 11:23
 * @change
 * @chang time
 * @class describe
 */
public interface Iservice {
    //把想暴露的方法都定义在接口中
    public void callPlayMusic();
    public void callPauseMusic();
    public void callRePlayMusic();
    public void stopMusic();
    public void callSeekTo(int position);
}

  • activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:onClick="playmusic"
        android:text="播放"
        app:layout_constraintEnd_toStartOf="@+id/button2"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="暂停"
        app:layout_constraintEnd_toStartOf="@+id/button3"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/button"
        app:layout_constraintTop_toTopOf="@+id/button"
        android:onClick="onPause"/>

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="重新播放"
        app:layout_constraintEnd_toStartOf="@+id/button4"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/button2"
        app:layout_constraintTop_toTopOf="@+id/button2"
        android:onClick="replaymusic"/>

    <Button
        android:id="@+id/button4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="停止播放"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/button3"
        app:layout_constraintTop_toTopOf="@+id/button3"
        android:onClick="stopMusci"/>

    <SeekBar
        android:id="@+id/seekBar"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="32dp"
        android:layout_marginEnd="8dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/button2" />

</android.support.constraint.ConstraintLayout>
  • AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.www.musicdemo">

    <uses-permission android:name="android.permission.INTERNET" />

    <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>

        <service
            android:name=".MyService"
            android:enabled="true"
            android:exported="true"></service>
    </application>

</manifest>
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