在设备中启用/禁用 GPS 时应用中的 setText

问题描述

我使用以下代码根据用户打开/关闭网络和 GPS 的时间更改两个文本视图。我能够让网络文本视图工作,但不能让位置文本视图工作。我想我使用了错误的过滤器,但我不知道该使用哪个过滤器。有什么建议/答案吗?

public class MainActivity extends AppCompatActivity {

TextView networkTextView;
TextView locationTextView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    networkTextView = findViewById(R.id.networkTextView);
    locationTextView = findViewById(R.id.locationTextView);

    IntentFilter filter1 = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
    registerReceiver(broadcastReceiver1,filter1);

    IntentFilter filter2 = new IntentFilter(LocationManager.PROVIDERS_CHANGED_ACTION);
    registerReceiver(broadcastReceiver2,filter2);
}

broadcastReceiver broadcastReceiver1 = new broadcastReceiver() {
    @Override
    public void onReceive(Context context,Intent intent) {
        if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) {
            boolean noNetworkConnectivity = intent.getBooleanExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY,false);
            if (noNetworkConnectivity) {
                networkTextView.setText("disconnected");
            } else {
                networkTextView.setText("Connected");
            }
        }
    }
};

broadcastReceiver broadcastReceiver2 = new broadcastReceiver() {
    @Override
    public void onReceive(Context context,Intent intent) {
        if (LocationManager.PROVIDERS_CHANGED_ACTION.equals(intent.getAction())) {
            boolean noLocationConnectivity = intent.getBooleanExtra(LocationManager.PROVIDERS_CHANGED_ACTION,false);
            if (noLocationConnectivity) {
                locationTextView.setText("disconnected");
            } else {
                locationTextView.setText("Connected");
            }
        }
    }
};

@Override
protected void onDestroy() {
    super.onDestroy();
    unregisterReceiver(broadcastReceiver1);
    unregisterReceiver(broadcastReceiver2);
}
}

更新:

在我替换的位置的广播接收器中

boolean noLocationConnectivity = intent.getBooleanExtra(LocationManager.PROVIDERS_CHANGED_ACTION,false);

LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
                boolean locationConnectivity = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);

但这没有用。可能需要向用户请求位置数据权限?

更新 2:

意识到它正在注册 LocationManager.GPS_provider 的布尔值更改,但不是最初。只有在应用启动后手动更改位置设置后,文本才会更改,这与网络检查不同,应用一启动就更改文本。

~已解决

不得不调用以下代码两次。一旦在接收器外部,然后在接收器内部。仍然不确定为什么它最初无法识别位置服务是打开还是关闭

LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        boolean locationConnectivity = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);

        if (locationConnectivity) {
            locationTextView.setText("Connected");
        } else {
            locationTextView.setText("disconnected");
        }

解决方法

我认为这个问题已经有人回答了here

但我在考虑使用 LocationManagerLocationListener 是否是一个好主意,我的意思是,LocationListener 有那些被覆盖的方法:

@Override
public void onProviderEnabled(String provider) {

}

@Override
public void onProviderDisabled(String provider) {

}

我把它留给你考虑