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
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("/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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