以横向模式启动片段

在此先感谢您的帮助 . 我正在尝试加载我的一个片段，它通过调用从横向模式的drawerlayout活动加载

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

片段以横向模式加载 . 我还有一个可运行的线程，它在片段绑定到后台服务后从onStart（）开始，并且runnable被杀死onStop（） .

private final Runnable initCommands = new Runnable() {
    @Override
    public void run() {
        Log.d(TAG,"running thread");
        if(isServiceBound) {

            //some code...
            new Handler().postDelayed(initCommands,800);
        }
    }
};

在片段绑定服务后启动runnable：

private ServiceConnection serviceConn = new ServiceConnection() {
    public void onServiceConnected(ComponentName className, IBinder binder) {
        ELMScanner.ELMScannerServiceBinder serviceBinder = (ELMScanner.ELMScannerServiceBinder) binder;
        scanner = serviceBinder.getService();
        isServiceBound = true;
        if (scanner.isConnected()) {

            Log.d(TAG,"init commands");

            new Handler().post(initCommands);
        }
    }

    public void onServiceDisconnected(ComponentName className) {
        isServiceBound = false;
        scanner.resetCommands();
    }
};

@Override
public void onStop() {
    super.onStop();
    Log.d(TAG,"onStop");
    FRAGMENT_RUNNING = 0;
    if (isServiceBound) {
        getActivity().getApplicationContext().unbindService(serviceConn);
        Log.d(TAG,"unbinding service");
        isServiceBound = false;
        scanner.resetCommands();
    }

}

我面临的问题来自setRequestedOrientation（ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE） . 由于某种原因，此方法重新加载片段而不是杀死第一个线程，因此有两个线程运行的实例 .

07-30 18:38:53.054    2940-2940/com.package/FuelFragment﹕ on Attach
07-30 18:38:53.054    2940-2940/com.package/FuelFragment﹕ onCreate
07-30 18:38:53.054    2940-2940/com.package/FuelFragment﹕ onCreatView
07-30 18:38:53.054    2940-2940/com.package/FuelFragment﹕ onstart
07-30 18:38:53.062    2940-2940/com.package/FuelFragment﹕ onStop
07-30 18:38:53.062    2940-2940/com.package/FuelFragment﹕ on Detach
07-30 18:38:53.070    2940-2940/com.package/ApplicationPackageManager﹕ cscCountry is not German : THR
07-30 18:38:53.070    2940-2940/com.package/FuelFragment﹕ on Attach
07-30 18:38:53.070    2940-2940/com.package/FuelFragment﹕ onCreate
07-30 18:38:53.242    2940-2940/com.package/FuelFragment﹕ onCreatView
07-30 18:38:53.250    2940-2940/com.package/FuelFragment﹕ onstart
07-30 18:38:53.257    2940-2940/com.package/FuelFragment﹕ init commands
07-30 18:38:53.257    2940-2940/com.package/FuelFragment﹕ init commands
07-30 18:38:53.328    2940-2940/com.package/FuelFragment﹕ running thread

我的问题：是否有一个替代setRequestedOrientation（）不重载片段？

谢谢 .

解：

万一你想知道如何解决这个问题 .

在onStart（）方法中，添加条件

int orientation = getResources().getConfiguration().orientation;

    if (orientation == 2) {
        Intent serviceIntent = new Intent(getActivity(), ELMScanner.class);
        getActivity().getApplicationContext().bindService(serviceIntent, serviceConn, Context.BIND_AUTO_CREATE);
    }

这将确保片段仅绑定到服务并在横向模式下启动时运行该线程 . 还要确保添加

@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);
    getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

}

@Override
public void onDetach() {
    super.onDetach();
    getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);

}