Android-Service实现手机壁纸自动更换

本文实例为大家分享了Android Service实现自动更换手机壁纸的具体代码，供大家参考，具体内容如下

先看下效果：

使用界面：

划重点，使用service前别忘了给相应的service添加服务

具体实现：

首先定义ChangeService类，继承Service访问系统实现壁纸切换

public class ChangeService extends Service {
  int[] wallpapers = new int[]{
      R.drawable.a2, R.drawable.a3, R.drawable.a4
  };
  WallpaperManager wallpaperManager;
  int current = 0;
  @Override
  public void onCreate() {
    super.onCreate();
    wallpaperManager = WallpaperManager.getInstance(this);
  }
  @Override
  public int onStartCommand(Intent intent, int flags, int startId) {
    if (current >= 3) {
      current = 0;
    } try {
      wallpaperManager.setResource(wallpapers[current++]);
    } catch (IOException e) {
      e.printStackTrace();
    } return START_STICKY;
  }
  @Nullable
  @Override
  public IBinder onBind(Intent intent) {
    return null;
  }
}

这里我们用闹钟访问pendingIntent来实现壁纸更换：

public class MainActivity extends Activity {
  private Button mStart;
  private Button mStop;

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

    mStart = (Button) findViewById(R.id.start);
    mStop = (Button) findViewById(R.id.stop);

    final Intent intent = new Intent(MainActivity.this, ChangeService.class);
     final PendingIntent pi = PendingIntent.getService(MainActivity.this, 0, intent, 0);
     mStart.setOnClickListener(new View.OnClickListener() {
       @Override
       public void onClick(View v) {
         AlarmManager alarmManager = (AlarmManager) getSystemService(Service.ALARM_SERVICE);
         alarmManager.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, 0, 2000, pi);
         mStart.setEnabled(false); mStop.setEnabled(true);
         Toast.makeText(MainActivity.this, "壁纸定时更换启动成功啦", Toast.LENGTH_SHORT).show();
       }
     });
     mStop.setOnClickListener(new View.OnClickListener() {
       @Override public void onClick(View v) {
         mStart.setEnabled(true);
       mStop.setEnabled(false);

       AlarmManager alarmManager = (AlarmManager) getSystemService(Service.ALARM_SERVICE);
        alarmManager.cancel(pi);
       }
     });
  }
}

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