在一段时间内禁用无线电组 (Android)

Question

我在自定义列表视图中有 3 个广播组。我需要从早上 9 点到下午 1 点启用第一个无线电组，然后禁用。第二个无线电组从下午 1 点到晚上 8 点启用，之后禁用，第三个无线电组从晚上 8 点到早上 8 点启用，之后禁用。我怎样才能达到同样的效果？？

BroadCastReceiver.java

public class BackgroundService extends Service {
private static BroadcastReceiver mTickReceiver;

public BackgroundService()
{

}



@Override
public IBinder onBind(Intent arg0)
{
    return null;
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    return START_STICKY;
}

@Override
public void onCreate()
{
    registerReceiver();
}

@Override
public void onDestroy()
{
    unregisterReceiver(mTickReceiver);
    mTickReceiver = null;
}



private void registerReceiver()
{
    mTickReceiver = new BroadcastReceiver()
    {
        @Override
        public void onReceive(Context context, Intent intent)  // this will fire every minute
        {
            String shift = null;
            DateFormat df = new SimpleDateFormat("HH:mm");
            String currentTimeString = df.format(Calendar.getInstance().getTime());
            Log.d("CurrentTime",currentTimeString);
            int currentTime=convertTimeToMinutes(currentTimeString);
            Log.d("CurrentTime1", String.valueOf(currentTime));
            Intent i=new Intent();
            i.setAction("TimeData");

            if(currentTime>=480 && currentTime<780) {
                shift = "Shift1";

            }
           else if(currentTime>=780 && currentTime<1200) {
                shift = "Shift2";


            }
           else if(currentTime>=1200 || currentTime<480) {
                shift = "Shift3";

            }
            Log.d("TAG1",shift);

            intent.putExtra("Shift",shift);

            sendBroadcast(i);


        }
    };
    IntentFilter filter = new IntentFilter(Intent.ACTION_TIME_TICK); // this will broadcast Intent every minute
    registerReceiver(mTickReceiver, filter);
}
private int convertTimeToMinutes(String s) {
    String[] hourMin = s.split(":");
    int hour = Integer.parseInt(hourMin[0]);
    int mins = Integer.parseInt(hourMin[1]);
    int hoursInMins = hour * 60;
    return hoursInMins + mins;
}

}

在 Activity onCreate 方法中，我按如下方式调用 BroadcastReceiver

    Intent i=new Intent(this, BackgroundService.class);
    startService(i);
    IntentFilter filter = new IntentFilter("TimeData");
    registerReceiver(new MyBroadcastReceiver(),filter);

BroadCastReceiver Class in Activity如下

    class MyBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        // GET BROADCAST FROM RECEIVER IN THE BACKGROUND SERVICE CLASS
        Toast.makeText(context, "Action: " + intent.getAction(), Toast.LENGTH_SHORT).show();

        Log.d("ActionData",intent.getAction());  // this works, it is checked

        if (intent.getAction() == "TimeData") {
            String shiftValue1= intent.getStringExtra("Shift");
            Log.d("shiftValue1",shiftValue1);
        }
    }
}

我得到的错误是

FATAL EXCEPTION: main Process: com.rakyow.ehandor, PID: 11492 java.lang.RuntimeException: Error receiving broadcast Intent { act=TimeData flg=0x10 } in com.rakyow.ehandor.HandoverDetailActivity$MyBroadcastReceiver@1acc203e at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:917) at android.os.Handler.handleCallback(Handler.java:815) at android.os.Handler.dispatchMessage(Handler.java:104) at android.os.Looper.loop(Looper.java:194) at android.app.ActivityThread.main(ActivityThread.java:5576) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:956) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:751) Caused by: java.lang.NullPointerException: println needs a message at android.util.Log.println_native(Native Method) at android.util.Log.d(Log.java:139) at com.rakyow.ehandor.HandoverDetailActivity$MyBroadcastReceiver.onReceive(HandoverDetailActivity.java:290) at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:907) at android.os.Handler.handleCallback(Handler.java:815) at android.os.Handler.dispatchMessage(Handler.java:104) at android.os.Looper.loop(Looper.java:194) at android.app.ActivityThread.main(ActivityThread.java:5576) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:956) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:751)

Answer 1

对于这种功能，您可以创建定时器服务来检查特定时间段的时间，或者您可以使用警报服务 将在特定时间触发。

Answer 2

这是你每分钟检查时间的方式：

public class BackgroundService extends Service {
    private static BroadcastReceiver mTickReceiver;

    public BackgroundService()
    {

    }



    @Override
    public IBinder onBind(Intent arg0)
    {
        return null;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        return START_STICKY;
    }

    @Override
    public void onCreate()
    {
        registerReceiver();
    }

    @Override
    public void onDestroy()
    {
        unregisterReceiver(mTickReceiver);
        mTickReceiver = null;
    }



    private void registerReceiver()
    {
        mTickReceiver = new BroadcastReceiver()
        {
            @Override
            public void onReceive(Context context, Intent intent)  // this will fire every minute
            {
                Log.d("TAG", "TICKS");
                // Check current time using getTimeInMilliSeconds() 
               // if time is in your desired range, send UI an intent that it should change radio buttons 

            }
        };
        IntentFilter filter = new IntentFilter(Intent.ACTION_TIME_TICK); // this will broadcast Intent every minute
        registerReceiver(mTickReceiver, filter);
    }

}

How to send info/data from a receiver in a service to MainActivity，您的案例信息要更新 UI。

在上面的示例中，我传递了位置数据，您可以在检查时间范围后传递任何信息。

更新：

使用 SimpleDateFormat 将毫秒转换为小时字符串（例如 1481879288 是“09:08am”（格林威治标准时间）。
写一个函数，把HH:mm[am/pm]格式转换成分钟——“09:08am”转换成728分钟，或者说“02:35pm” 875 分钟，这是从 12:00am 参考点开始的，其中 12:00am 是 0 分钟过去了。 (Hint: break string, convert hours to minutes, add minutes part to converted one, write checks for am/pm) 提示提示 - 如果将毫秒转换为 24 小时格式，您将避免检查 am/pm，只需乘以 60xhourPart 并添加分钟部分。

将分钟范围与您的范围进行比较，例如从 08:00am 到 08:00pm，这将是 480 分钟到 1200 分钟，所以如果当前时间是 09:08am，检查将是：

 int currentTime=convertTimeToMinutes(currentTimeString);              

 // to check if time is between 08:00am to 08:00pm

 if(currentTime>=480 && currentTime<=1200) {

    Log.d(TAG,"Current time is in between 08:00am to 08:00pm");

}

How if the range is between 8pm-8am(Next day happens)??

如果是这种情况，请使用检查来查看时间是大于晚上 8 点还是小于早上 8 点，注意这里检查的是 ||不是＆＆。

if (currentTime>=1320 || currentTime <=480)
{
// your stuff
}

更新 2

String 比较必须始终使用 .equals() 方法而不是 ==，因为您使用 ==，行

String shiftValue1= intent.getStringExtra("Shift")

从不执行，你应该写成：

if (intent.getAction().equals("TimeData")) {
            String shiftValue1= intent.getStringExtra("Shift");
            Log.d("shiftValue1",shiftValue1);
}

更新 3

不要这样做：

intent.putExtra("Shift",shift);

这样做：

i.putExtra("Shift",shift);

看到您正在发送与收到的相同的意图对象。

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