Make按钮在每小时的开始时都可见？

Question

我的主要活动有一个按钮，用于在提交数据的位置打开表单活动。提交数据后，按钮将消失。我如何让它在当天每个小时的开始时出现？

例如，如果我在晚上7:05提交数据，该按钮将消失，直到下午8:00。当我按下按钮再次提交数据时，该按钮将消失至晚上9点，依此类推。

Answer 1

当您提交数据时，获取当前时间戳记并将其存储在sharedPref中。开始活动时，请检查sharedPref并将其与设备的当前时间进行比较。

Answer 2

尝试使用后台服务，并在1小时设置的通知间隔和 启动服务时，按钮点击后比你想在这样的背景服务

BackgroundService.java 

public class BackgroundService extends Service { 

public static final int notify = 100000; //interval between two services(Here Service run every 1 Minute) 

private Timer mTimer = null; //timer handling 

Context context; 

ScheduledExecutorService scheduleTaskExecutor; 

View view; 

Handler mHandler = new Handler(); 

/** indicates how to behave if the service is killed */ 
int mStartMode; 

/** interface for clients that bind */ 
IBinder mBinder; 

/** indicates whether onRebind should be used */ 
boolean mAllowRebind; 

/** Called when the service is being created. */ 
@Override 
public void onCreate() { 
    super.onCreate(); 
    context = getApplicationContext(); 

    Toast.makeText(this, "Service is created", Toast.LENGTH_SHORT).show(); 

    if (mTimer != null) // Cancel if already existed 
     mTimer.cancel(); 
    else 
     mTimer = new Timer(); //recreate new 
    mTimer.scheduleAtFixedRate(new TimeDisplay(), 0, notify); //Schedule task 
} 

/** The service is starting, due to a call to startService() */ 
@Override 
public int onStartCommand(Intent intent, int flags, int startId) { 
    return super.onStartCommand(intent, flags, startId); 

} 

@Override 
public IBinder onBind(Intent intent){ 
    return null; 
} 

/** Called when all clients have unbound with unbindService() */ 
@Override 
public boolean onUnbind(Intent intent) { 
    return mAllowRebind; 
} 

/** Called when a client is binding to the service with bindService()*/ 
@Override 
public void onRebind(Intent intent) { 

} 

/** Called when The service is no longer used and is being destroyed */ 
@Override 
public void onDestroy() { 
    super.onDestroy(); 
    mTimer.cancel(); //For Cancel Timer 
    Toast.makeText(this, "Service Destroyed", Toast.LENGTH_LONG).show(); 
} 

//class TimeDisplay for handling task 
class TimeDisplay extends TimerTask { 
    @Override 
    public void run() { 
     // run on another thread 
     mHandler.post(new Runnable() { 
      @Override 
      public void run() { 
     // Toast.makeText(this, "Service Start",Toast.LENGTH_LONG).show(); 
      } 
     }); 
    } 
} 

}

AndroidManifest.xml 
<service android:name=".BackgroundService.KametSportsEventsService" android:enabled="true" /> 

做什么

//启动后台服务

startService（新意图（getBaseContext（），BackgroundService.class））;

//停止后台服务

stopService（新意图（getBaseContext（），BackgroundService.class））;