Android(安卓)Service后台处理结果给Activity

AndroidManifest

第一步

public class ServiceActivity extends Activity {    @BindView(R.id.stop_bu)    Button stopBu;    @BindView(R.id.statr_bu)    Button statrBu;    public static TextView serviet_tv;    public static Handler handler = new Handler() {        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            if (msg.what == 1) {                serviet_tv.setText((String) msg.obj);            }        };    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_service);        ButterKnife.bind(this);        serviet_tv = (TextView) findViewById(R.id.serviet_tv);//        stop_bu.setOnClickListener(view ->{//            stopService(new Intent(ServiceActivity.this,MyTimerService.class));//        });//    }    @OnClick({R.id.stop_bu, R.id.statr_bu})    public void onViewClicked(View view) {        switch (view.getId()) {            case R.id.stop_bu:                stopService(new Intent(ServiceActivity.this, MyTimerService.class));                break;            case R.id.statr_bu:                startService(new Intent(ServiceActivity.this, MyTimerService.class));                break;        }    }}

第二步

//后台定时执行 sercice请求 执行后的结果，怎么传递给前台Activitypublic class MyTimerService extends Service {    Timer timer;    TimerTask task;    @Override    public IBinder onBind(Intent intent) {        return null;    }    @Override    public void onCreate() {        timer = new Timer();        super.onCreate();    }    //开始服务    @Override    public int onStartCommand(Intent intent, int flags, int startId) {        task = new TimerTask() {            @Override            public void run() {                Log.i("www", "222222222");                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");                String str = sdf.format(new Date());                Message message = new Message();                message.what = 1;                message.obj = str;                ServiceActivity.handler.sendMessage(message);            }        };        timer.schedule(task, 0, 100);        return super.onStartCommand(intent, flags, startId);    }    @Override    public void onDestroy() {        timer.cancel();        super.onDestroy();    }}

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