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

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

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);
      }
    });
 }
}

布局设计：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
 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" >

<LinearLayout
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:layout_alignParentBottom="true"
   android:orientation="horizontal">

<Button
     android:id="@+id/start"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_weight="1"
     android:gravity="center_horizontal"
     android:text="Start"
     android:textSize="25dp"
     android:textColor="#ffffffff"/>

<Button
     android:id="@+id/stop"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_weight="1"
     android:gravity="center_horizontal"
     android:text="Stop"
     android:textSize="25dp"
     android:textColor="#ffffffff"/>
 </LinearLayout>

</RelativeLayout>

来源：https://blog.csdn.net/qq_43377749/article/details/84347766