不调用onActivityResult()(MapFragment) [英] onActivityResult() is not called (MapFragment)

问题描述

我正在尝试使我的地图应用重定向到位置权限的设置，并且一旦授予权限，便再次重定向到该应用.由于某种原因，启动活动意图后甚至没有调用我的onActivityResult.基本上发生的是，当我单击出现的snackbar操作按钮时，它会启动settingsIntent并很好地将我重定向到设置，但是该活动不会进入结果状态，并且永远不会调用onActivityResult 有什么建议吗?

I am trying to make my map app redirect to the settings for location permissions and once permissions are granted redirect again to the app. for some reason my onActivityResult is not even called after starting the activity intent. and basically what happens is when I click on the snackbar action button that appears, it starts the settingsIntent and redirects me to the settings nicely but the activity isn't going for result state and the onActivityResult is never called any suggestions?

下面是代码:

class MapsActivity : AppCompatActivity(), OnMapReadyCallback {

    private lateinit var mMap: GoogleMap

    private fun checkPermissions(): Boolean {
        //returns true if granted permission for location
        var checker = ActivityCompat.checkSelfPermission(
            applicationContext,
            android.Manifest.permission.ACCESS_COARSE_LOCATION
        ) == PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(
            applicationContext,
            android.Manifest.permission.ACCESS_FINE_LOCATION
        ) == PackageManager.PERMISSION_GRANTED
        if (checker) {
            Log.d(TAG, "granted Permissions")
        } else {
            Log.d(TAG, "no Permissions granted")
        }
        return checker
    }

    @RequiresApi(Build.VERSION_CODES.M)
    private fun requestPermissions() {
        requestPermissions(
            arrayOf(
                android.Manifest.permission.ACCESS_COARSE_LOCATION,
                android.Manifest.permission.ACCESS_FINE_LOCATION
            ), PERMISSION_ID

        )

    }

    override fun onRequestPermissionsResult(
        requestCode: Int,
        permissions: Array<out String>,
        grantResults: IntArray
    ) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
        if (!checkPermissions()) {
            Snackbar.make(
                    map.view!!,
                    "Please Enable Location Permission",
                    Snackbar.LENGTH_INDEFINITE
                ).setAction("Enable Location",
                    View.OnClickListener {
                        var settingsIntent = Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS)
                        startActivityForResult(settingsIntent, 1)


                    })
                .show()
        }
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        Log.d(TAG, "Redirected to settings for Location Permissions ")
        if (resultCode == Activity.RESULT_OK) {
            if (checkPermissions()) {
                Log.d(TAG, "Permissions granted from settings")
                startActivity(Intent(this, MapsActivity::class.java))
            }
        }
        super.onActivityResult(requestCode, resultCode, data)
    }

    override fun onCreate(savedInstanceState: Bundle?) {

        Log.d(TAG, "onCreate called")
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_maps)
        // Obtain the SupportMapFragment and get notified when the map is ready to be used.
        val mapFragment = supportFragmentManager
            .findFragmentById(R.id.map) as SupportMapFragment
        mapFragment.getMapAsync(this)


    }

    @RequiresApi(Build.VERSION_CODES.M)
    override fun onMapReady(googleMap: GoogleMap) {
        Log.d(TAG, "omMapReady:starts")
        mMap = googleMap
        requestPermissions()

    }
}

清单:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.burgertracker">

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission>


    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <meta-data
            android:name="com.google.android.geo.API_KEY"
            android:value="@string/google_maps_key" />
        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />


        <activity
            android:name=".MapsActivity"
            android:label="@string/title_activity_maps">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <action android:name="android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>

        </activity>

    </application>

</manifest>

推荐答案

int PERMISSION_ID = 44;
FusedLocationProviderClient mFusedLocationClient;

@RequiresApi(api = Build.VERSION_CODES.M)
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    super.setContentView(R.layout.activity_home);
            mFusedLocationClient = 
            LocationServices.getFusedLocationProviderClient(this);
            getLastLocation();
    }

private boolean checkPermissions() {
    if (ActivityCompat.checkSelfPermission(HomeActivity.this, 
 Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED &&
            ActivityCompat.checkSelfPermission(HomeActivity.this, 
 Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
        return true;
    }
    return false;
}

private void requestPermissions() {
    ActivityCompat.requestPermissions(
            HomeActivity.this,
            new String[]{Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION},
            PERMISSION_ID
    );
}


private boolean isLocationEnabled() {
    LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    return locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) || locationManager.isProviderEnabled(
            LocationManager.NETWORK_PROVIDER
    );
}


@RequiresApi(api = Build.VERSION_CODES.M)
@SuppressLint("MissingPermission")
private void getLastLocation() {
    if (checkPermissions()) {
        if (isLocationEnabled()) {
            mFusedLocationClient.getLastLocation().addOnCompleteListener(
                    new OnCompleteListener<Location>() {
                        @Override
                        public void onComplete(@NonNull Task<Location> task) {
                            Location location = task.getResult();
                            if (location == null) {
                                requestNewLocationData();
                            } else {


                                Geocoder geocoder = new Geocoder(HomeActivity.this, Locale.getDefault());
                                List<Address> addresses = null;
                                try {
                                    addresses = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 1);
                                } catch (IOException e) {
                                    e.printStackTrace();
                                }


                                assert addresses != null;

                                if (addresses != null) {

                                    String cityName = addresses.get(0).getAddressLine(0);
                                    String stateName = addresses.get(0).getAddressLine(1);
                                    String countryName = addresses.get(0).getAddressLine(2);

                                    String[] arrOfStr = cityName.split(",");

                                    locationTV.setText("You're in " + arrOfStr[arrOfStr.length - 2] + ", " + arrOfStr[arrOfStr.length - 1]);
                                }

                            }
                        }
                    }
            );
        } else {
            Toast.makeText(this, "Turn on location", Toast.LENGTH_LONG).show();
            Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            startActivity(intent);
        }
    } else {
        requestPermissions();
    }
}


@RequiresApi(api = Build.VERSION_CODES.M)
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    if (requestCode == PERMISSION_ID) {
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            getLastLocation();
        }
    }
}

@RequiresApi(api = Build.VERSION_CODES.M)
@Override
public void onResume() {
    super.onResume();
    if (checkPermissions()) {
        getLastLocation();
    }

}


@SuppressLint("MissingPermission")
private void requestNewLocationData() {

    LocationRequest mLocationRequest = new LocationRequest();
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    mLocationRequest.setInterval(0);
    mLocationRequest.setFastestInterval(0);
    mLocationRequest.setNumUpdates(1);

    mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this);
    mFusedLocationClient.requestLocationUpdates(
            mLocationRequest, mLocationCallback,
            Looper.myLooper()
    );

}

private LocationCallback mLocationCallback = new LocationCallback() {
    @Override
    public void onLocationResult(LocationResult locationResult) {
        Location mLastLocation = locationResult.getLastLocation();
        Geocoder geocoder = new Geocoder(HomeActivity.this, Locale.getDefault());
        List<Address> addresses = null;
        try {
            addresses = geocoder.getFromLocation(mLastLocation.getLatitude(), mLastLocation.getLongitude(), 1);
        } catch (IOException e) {
            e.printStackTrace();
        }

        assert addresses != null;


        if (addresses != null) {


            String cityName = addresses.get(0).getAddressLine(0);
            String stateName = addresses.get(0).getAddressLine(1);
            String countryName = addresses.get(0).getAddressLine(2);

            String[] arrOfStr = cityName.split(",");


            locationTV.setText("You're in " + arrOfStr[arrOfStr.length - 2] + ", "  + 
            arrOfStr[arrOfStr.length - 1]);

        }


    }


};

这篇关于不调用onActivityResult()(MapFragment)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！