打开/关闭gps时如何触发广播接收器？

Question

public class BootReceiver extends BroadcastReceiver  {

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().matches("android.location.PROVIDERS_CHANGED")) {
            Toast.makeText(context, "in android.location.PROVIDERS_CHANGED",
                Toast.LENGTH_SHORT).show();
            Intent pushIntent = new Intent(context, LocalService.class);
            context.startService(pushIntent);
        } else {
            Toast.makeText(context, "not in android.location.PROVIDERS_CHANGED",
                Toast.LENGTH_SHORT).show();
            Intent pushIntent = new Intent(context, LocalService.class);
            context.startService(pushIntent);
        }
    }

    @Override
    public void onLocationChanged(Location arg0) {

    }
}

在我的应用程序中,我需要在打开/关闭gps时触发广播接收器.调查此事并建议在app中实施最好的一个.

Answer 1

当用户想要在打开/关闭位置提供时触发任何操作时,这非常有用

您应该在清单中添加此操作

<action android:name="android.location.PROVIDERS_CHANGED" />

添加此操作后,您可以触发广播接收器

<receiver android:name=".GpsLocationReceiver">
    <intent-filter>
        <action android:name="android.location.PROVIDERS_CHANGED" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</receiver>

在你的BroadcastReceiver课堂上,你必须LocationListener在那个课程中实现,如下所示.

public class GpsLocationReceiver extends BroadcastReceiver {        
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().matches("android.location.PROVIDERS_CHANGED")) {
            Toast.makeText(context, "in android.location.PROVIDERS_CHANGED",
            Toast.LENGTH_SHORT).show();
            Intent pushIntent = new Intent(context, LocalService.class);
            context.startService(pushIntent);
        }
    }
}

Answer 2

我想添加@Deepak Gupta的 答案.我想添加代码,以便在GPS状态发生变化时如何在片段或活动中注册动态brodacsast接收器.

在您的活动或片段中注册您的广播接收器,如下所示.

private BroadcastReceiver gpsReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().matches(LocationManager.PROVIDERS_CHANGED_ACTION)) {
            //Do your stuff on GPS status change
        }
    }
};

对于片段:

getContext().registerReceiver(gpsReceiver, new IntentFilter(LocationManager.PROVIDERS_CHANGED_ACTION));

对于活动:

registerReceiver(gpsReceiver, new IntentFilter(LocationManager.PROVIDERS_CHANGED_ACTION));

这可用于您可以访问Context的任何位置,而不仅仅是在活动或片段内.我希望它有所帮助.

Answer 3

您可以尝试使用此代码,因为用户@DanielNugent指出:

    ContentResolver contentResolver = getContext().getContentResolver();
    // Find out what the settings say about which providers are enabled
    int mode = Settings.Secure.getInt(
            contentResolver, Settings.Secure.LOCATION_MODE, Settings.Secure.LOCATION_MODE_OFF);

    if (mode != Settings.Secure.LOCATION_MODE_OFF) {
      if (mode == Settings.Secure.LOCATION_MODE_HIGH_ACCURACY) {
        locationMode = "High accuracy. Uses GPS, Wi-Fi, and mobile networks to determine location";
      } else if (mode == Settings.Secure.LOCATION_MODE_SENSORS_ONLY) {
          locationMode = "Device only. Uses GPS to determine location";
      } else if (mode == Settings.Secure.LOCATION_MODE_BATTERY_SAVING) {
          locationMode = "Battery saving. Uses Wi-Fi and mobile networks to determine location";
      }
    }