我們的廣告系統，為了防止被客戶關閉，必須要每隔一段時間啟動一次。

建立一個Service：

最關鍵的是onStartCommand 裡面返回的Service.START_STICKY, 

return Service.START_STICKY

package com.wbm.app.servicetest.servic;

import android.app.Service;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.os.IBinder;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

import java.util.List;

public class StartService extends Service implements  Runnable{
    private Thread thread;
    public StartService() {
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        //throw new UnsupportedOperationException("Not yet implemented");

        return null;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        //onCreate的時候建立初始化
        thread = new Thread(this);
        thread.start();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
    //    return super.onStartCommand(intent, flags, startId);
        //如果服務並停止了，重新生成一個新的
        if(thread.isInterrupted()){
            thread = new Thread(this);
            thread.start();
        }
        return Service.START_STICKY;
    }

    @Override
    public void run() {
        int i=0;
        while (true){
            try {
                //每10秒鐘進行一次輸出
                Thread.sleep(10000);
                //Toast.makeText(getApplicationContext(),"服務啟動"+i++,Toast.LENGTH_LONG).show();
                Log.d("kodulf", "服務啟動"+i++);
                openApp("com.wbm.app.tvad");
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

    }

//    private void openApp(View v, String packageName) {
    private void openApp(String packageName) {
        //Context context = v.getContext();
        PackageInfo pi = null;
        //PackageManager pm = context.getPackageManager();
        PackageManager pm = getPackageManager();
        try {
            pi = pm.getPackageInfo(packageName, 0);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }

        Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);
        resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);
        resolveIntent.setPackage(pi.packageName);

        List<ResolveInfo> apps = pm.queryIntentActivities(resolveIntent, 0);

        ResolveInfo ri = apps.iterator().next();
        if (ri != null ) {
            packageName = ri.activityInfo.packageName;
            String className = ri.activityInfo.name;

            Intent intent = new Intent(Intent.ACTION_MAIN);
            intent.addCategory(Intent.CATEGORY_LAUNCHER);

            ComponentName cn = new ComponentName(packageName, className);
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            intent.setComponent(cn);
            startActivity(intent);
        }
    }
}
 

        <service
            android:name=".servic.StartService"
            android:enabled="true"
            android:exported="true"></service>