Question

首先很抱歉问这个愚蠢的问题。由于我是Android的新手所以我正在尝试创建一个应用程序，其中首先会打开对话框，要求允许打开像Google地图或ola这样的GPS。然后，我想获得用户的经纬度，但不幸的是我尝试了搜索这么多的链接，但我没有得到正确的解决方案。所以任何人都可以帮助我。

我的代码是：

public class GpsPlaceSearch extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks,
    GoogleApiClient.OnConnectionFailedListener, LocationListener 
{
    Activity context;
    GoogleApiClient googleApiClient, getGoogleApiClient;
    protected static final int REQUEST_CHECK_SETTINGS = 0x1;
    LocationRequest locationRequest1;

    Location location;
    private double currentLatitude;
    private double currentLongitude;
    private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000;
    private static final int MY_PERMISSIONS_REQUEST_FINE_LOCATION = 111;

    public GpsPlaceSearch(){

    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_gps_place_search);
        getGoogleApiClient = new GoogleApiClient.Builder(this)
                class will handle connection stuff
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)

                .addApi(LocationServices.API)
                .build();

        locationRequest1=locationRequests();
    }

    public GpsPlaceSearch(Activity context){
        this.context=context;
        googleApiClient=getInstance();
        if (googleApiClient!=null){
            settingsrequest();

            googleApiClient.connect();
        }
    }

    public LocationRequest locationRequests(){
        LocationRequest locationRequest=LocationRequest.create();
        locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
        locationRequest.setInterval(30 * 1000);
        locationRequest.setFastestInterval(5 * 1000);
        return locationRequest;
    }

    public GoogleApiClient getInstance(){
        GoogleApiClient mGoogleApiClient=new GoogleApiClient.Builder(context).addConnectionCallbacks(this).addOnConnectionFailedListener(this).addApi(LocationServices.API).build();
        return mGoogleApiClient;
    }

    public void settingsrequest(){
        Log.e("settingsrequest","Comes");

        locationRequest1=locationRequests();
        LocationSettingsRequest.Builder builder=new LocationSettingsRequest.Builder().addLocationRequest(locationRequest1);

        builder.setAlwaysShow(true);
        final PendingResult<LocationSettingsResult> result= LocationServices.SettingsApi.checkLocationSettings(googleApiClient, builder.build());
        result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
            @Override
            public void onResult(LocationSettingsResult result) {
                Status status=result.getStatus();
                LocationSettingsStates states=result.getLocationSettingsStates();
                switch (status.getStatusCode()){
                    case LocationSettingsStatusCodes.SUCCESS:

                        break;
                    case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
                        try{
                            status.startResolutionForResult(context,REQUEST_CHECK_SETTINGS);
                        } catch (IntentSender.SendIntentException e) {
                            e.printStackTrace();
                        }
                        break;
                    case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:

                        break;
                }
            }
        });
    }

    @RequiresApi(api = Build.VERSION_CODES.M)
    @Override
    public void onConnected(Bundle bundle) {
        location=LocationServices.FusedLocationApi.getLastLocation(getGoogleApiClient);
        if (ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.ACCESS_FINE_LOCATION)!= PackageManager.PERMISSION_GRANTED){
            requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION},108);
            LocationServices.FusedLocationApi.requestLocationUpdates(getGoogleApiClient,locationRequest1,this);

        }
        else {

            currentLatitude = location.getLatitude();
            currentLongitude = location.getLongitude();

            Toast.makeText(this, currentLatitude + " AND " + currentLongitude + "", Toast.LENGTH_LONG).show();
        }
    }

    @Override
    public void onConnectionSuspended(int i) {

    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {

        if (connectionResult.hasResolution()){
            try {
                connectionResult.startResolutionForResult(this, CONNECTION_FAILURE_RESOLUTION_REQUEST);
            } catch (IntentSender.SendIntentException e) {
                e.printStackTrace();
            }
        }
        else {
            Log.e("Error", "Location services connection failed with code " + connectionResult.getErrorCode());
        }

    }

    @Override
    protected void onStart() {
        super.onStart();
        Activity mActivity=this;
        GpsPlaceSearch gpsPlaceSearch=new GpsPlaceSearch(mActivity);
    }

    @Override
    protected void onResume() {
        super.onResume();
        //Now lets connect to the API
        getGoogleApiClient.connect();
    }

    @Override
    protected void onPause() {
        super.onPause();

        if (getGoogleApiClient.isConnected()){
            LocationServices.FusedLocationApi.removeLocationUpdates(getGoogleApiClient,this);
            getGoogleApiClient.disconnect();
        }

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        LocationSettingsStates states=LocationSettingsStates.fromIntent(data);
        switch (requestCode){
            case REQUEST_CHECK_SETTINGS:
                switch (resultCode){
                    case Activity.RESULT_OK:
                        break;
                    case Activity.RESULT_CANCELED:
                        startActivity(new Intent(getApplicationContext(),Login_page.class));
                        break;
                }
                break;
        }
    }

    @Override
    public void onLocationChanged(Location location) {

        currentLatitude = location.getLatitude();
        currentLongitude = location.getLongitude();
        Toast.makeText(this, currentLatitude + " WORKS " + currentLongitude + "", Toast.LENGTH_LONG).show();
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode) {
            case MY_PERMISSIONS_REQUEST_FINE_LOCATION:
                if (grantResults.length>0 && grantResults[0]==PackageManager.PERMISSION_GRANTED){

                }
                else {

                }
                return;
        }
    }
}

Logcat：

致命的例外：主要过程：com.bigfoot.trialapp，PID：17660 java.lang.IllegalArgumentException：GoogleApiClient参数是需要。在com.google.android.gms.common.internal.zzaa.zzb（未知来源）在com.google.android.gms.location.LocationServices.zzj（未知资源）在 com.google.android.gms.location.internal.zzd.getLastLocation（未知资源）在 com.bigfoot.trialapp.GpsPlaceSearch.onConnected（GpsPlaceSearch.java:128）在com.google.android.gms.common.internal.zzk.zzp（未知来源）在com.google.android.gms.internal.zzrd.zzn（未知来源）在com.google.android.gms.internal.zzrb.zzass（未知来源）在com.google.android.gms.internal.zzrb.onConnected（未知来源）在com.google.android.gms.internal.zzrf.onConnected（未知来源）在com.google.android.gms.internal.zzqr.onConnected（未知来源）在com.google.android.gms.common.internal.zzj $ 1.onConnected（未知资源）在com.google.android.gms.common.internal.zze $ zzj.zzavj（未知资源）在com.google.android.gms.common.internal.zze $ zza.zzc（未知来源）在com.google.android.gms.common.internal.zze $ zza.zzv（未知来源）在com.google.android.gms.common.internal.zze $ zze.zzavl（未知资源）在 com.google.android.gms.common.internal.zze $ zzd.handleMessage（未知资源）在android.os.Handler.dispatchMessage（Handler.java:102）在android.os.Looper.loop（Looper.java:148）在android.app.ActivityThread.main（ActivityThread.java:5443） at java.lang.reflect.Method.invoke（Native Method）在 com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:728）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:618）

Answer 1

您应该从 onConnected

中删除以下行

 location=LocationServices.FusedLocationApi.getLastLocation(getGoogleApiClient);

并且只应在 onConnected

中调用 requestLocationUpdates 方法

@RequiresApi(api = Build.VERSION_CODES.M)
@Override
public void onConnected(Bundle bundle) {

    if (ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.ACCESS_FINE_LOCATION)!= PackageManager.PERMISSION_GRANTED){
        requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION},108);
        LocationServices.FusedLocationApi.requestLocationUpdates(getGoogleApiClient,locationRequest1,this);

    } 
}else{
    //custom dialog for "please enable location permission to access device location"
}

IllegalArgumentException：需要GoogleApiClient参数

1 个答案: