视力保护程序

墨蓝 2022-08-19 13:24 188阅读 0赞

1、布局文件

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >
    
        <TextView
            android:id="@+id/textView"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="视力保护程序"
            android:textColor="@android:color/black"
            android:textSize="25dp" />
    
    </LinearLayout>

2、创建TimeService类，继承Service类

public class TimeService extends Service {
    
        private Timer timer;
    
        @Override
        public IBinder onBind(Intent intent) {
            return null;
        }
    
        @Override
        public void onCreate() {
            super.onCreate();
            timer = new Timer(true);// 创建Timer对象
        }
    
        @Override
        public void onStart(Intent intent, int startId) {
            super.onStart(intent, startId);
    
            timer.schedule(new TimerTask() {
    
                @Override
                public void run() {
                    String ns = Context.NOTIFICATION_SERVICE;
                    NotificationManager manager = (NotificationManager) getSystemService(ns);// 获得通知管理器
                    Notification notification = new Notification(R.drawable.warning, getText(R.string.ticker_text), System.currentTimeMillis());// 创建通知
                    CharSequence contentTitle = getText(R.string.content_title);// 定义通知的标题
                    CharSequence contentText = getText(R.string.content_text);// 定义通知的内容
                    Intent intent = new Intent(TimeService.this, MainActivity.class);// 创建Intent对象
                    PendingIntent contentIntent = PendingIntent.getActivity(TimeService.this, 0, intent, Intent.FLAG_ACTIVITY_NEW_TASK);// 创建PendingIntent对象
                    notification.setLatestEventInfo(TimeService.this, contentTitle, contentText, contentIntent);// 定义通知行为
                    manager.notify(0, notification);// 显示通知
                    TimeService.this.stopSelf();// 停止服务
                }
            }, 60000);
        }
    }

3、MainActivity

public class MainActivity extends Activity {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            startService(new Intent(this, TimeService.class));
        }
    }

4、AndroidManifest.xml文件

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[Center]: /images/20220731/68c68f532e2a4219896c5b3813d0a7c2.png
[Center 1]: /images/20220731/fcd230f36b344b8ca2daec95f465dd32.png