Service的学习代码

1. startService(new Intent(MainActivity.this, MyService.class))------->stopService(new Intent(MainActivity.this, MyService.class))

2.bindService(new Intent(MainActivity.this, MyService.class), mServiceConnection,Context.BIND_AUTO_CREATE)---->

if(mServiceConnection != null){unbindService(mServiceConnection);mServiceConnection = null;
}----->一般放在onDestory()函数里面

MainActivity.java

private MyService myService;

 private ServiceConnection mServiceConnection = new ServiceConnection() {
     @Override
     public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
         Log.i("jxy",this.getClass().getName() + "--->onServiceConnected");
         myService = ((MyService.MyBinder)iBinder).getService();
     }

     @Override
     public void onServiceDisconnected(ComponentName componentName) {
         Log.i("jxy",this.getClass().getName() + "--->onServiceDisconnected");
     }
 };

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

@Override
protected void onDestroy() {
    super.onDestroy();
    if(mServiceConnection != null){
        unbindService(mServiceConnection);
        mServiceConnection = null;
    }
}

public void startService(View view) {
    startService(new Intent(MainActivity.this, MyService.class));
}

public void stopService(View view) {
    stopService(new Intent(MainActivity.this, MyService.class));
}

public void bindService(View view) {
    bindService(new Intent(MainActivity.this, MyService.class), mServiceConnection,
            Context.BIND_AUTO_CREATE);
}

public void mp3player(View view){
    myService.mp3Play((String) view.getTag());
}

MyService.java

class MyBinder extends Binder{
      public MyService getService(){
         return MyService.this;
      }
   }
   @Override
   public IBinder onBind(Intent intent) {
//    Log.i("jxy",this.getClass().getName() + "--->onBind");
//    Binder binder = new Binder();
//    Log.i("jxy",this.getClass().getName() + "--->binder:" + binder);
      return new MyBinder();
   }
   
   @Override
   public boolean onUnbind(Intent intent) {
      Log.i("jxy",this.getClass().getName() + "--->onUnbind");
      return super.onUnbind(intent);
   }

   @Override
   public void onCreate() {
      super.onCreate();
      Log.i("jxy",Thread.currentThread().getName() + ":MyService --> onCreate");
   }

   @Override
   public int onStartCommand(Intent intent, int flags, int startId) {
      Log.i("jxy",Thread.currentThread().getName() + "MyService --> onStartCommand");
      return super.onStartCommand(intent, flags, startId);
   }

   @Override
   public void onDestroy() {
      super.onDestroy();
      Log.i("jxy",Thread.currentThread().getName() + "MyService --> onDestroy");
   }

   // 此方法完成MP3播放的功能
   public void mp3Play(String name){
      Log.i("jxy",this.getClass().getName() + "--->正在播放的歌曲名称为:" + name);
   }
   
activity.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="16dp">

    <Button
        android:onClick="startService"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="启动服务" />
    
    <Button
        android:onClick="stopService"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="停止服务" />
    <Button
        android:onClick="bindService"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="绑定服务" />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="解绑服务" />
    
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="调用系统服务挂断电话" />
    
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="测试黑名单拦截(调用系统服务)" />
    
    <Button
        android:tag="相信自己"
        android:onClick="mp3player"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="音乐播放测试" />

</LinearLayout>

Manifest.xml文件的service的注册

<service android:name=".MyService" />