3

有很多类似的问题被问到，但似乎没有一个能解决我的问题。

我已经应用了文档中提到的运行时权限，但仍然出现运行时错误

LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);

这是我的完整代码。

public class MainActivity extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks,
    GoogleApiClient.OnConnectionFailedListener,LocationListener {

private static final String TAG ="hello" ;
private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;


public Location mLastLocation=null;


public final int MY_PERMISSIONS_REQUEST_COARSE_LOCATION=0;

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

    if (mGoogleApiClient==null){
        mGoogleApiClient= new GoogleApiClient.Builder(this)

                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
    }

    mLocationRequest = LocationRequest.create()
            .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
            .setInterval(10 * 100)        // 10 seconds, in milliseconds
            .setFastestInterval( 1* 100); // 1 second, in milliseconds

    }









@Override
public void onConnected(@Nullable Bundle bundle) {


    int permissionCheck = ContextCompat.checkSelfPermission(this,
            Manifest.permission.ACCESS_FINE_LOCATION);
    int permissionCheck1 = ContextCompat.checkSelfPermission(this,
            Manifest.permission.ACCESS_COARSE_LOCATION);
    if (permissionCheck != PackageManager
            .PERMISSION_GRANTED && permissionCheck1 != PackageManager.PERMISSION_GRANTED) {

        if (ActivityCompat.shouldShowRequestPermissionRationale(this,
                Manifest.permission.ACCESS_FINE_LOCATION)) {

            // Show an explanation to the user *asynchronously* -- don't block
            // this thread waiting for the user's response! After the user
            // sees the explanation, try again to request the permission.

        } else {

            // No explanation needed, we can request the permission.

            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
                    MY_PERMISSIONS_REQUEST_COARSE_LOCATION);


        }
    }


    mLastLocation=LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
    if (mLastLocation != null) {
        TextView mLatitudeText =(TextView)findViewById(R.id.textView);
        TextView mLongitudeText =(TextView)findViewById(R.id.textView2);

        mLatitudeText.setText(String.valueOf(mLastLocation.getLatitude()));
        mLongitudeText.setText(String.valueOf(mLastLocation.getLongitude()));

        Log.i("Location Info", "Location achieved!");

    } else {



        Log.i("Location Info", "No location :(");

    }


    LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);//error here!!






}



@Override
public void onConnectionSuspended(int i) {

}

@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

}

@Override
protected void onResume() {
    mGoogleApiClient.connect();
    super.onResume();

}

@Override
protected void onPause() {
    mGoogleApiClient.disconnect();
    super.onPause();
}



@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    switch (requestCode) {
        case  MY_PERMISSIONS_REQUEST_COARSE_LOCATION :{
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                Log.i("Message","Got full permission");



            } else {

                // permission denied, boo! Disable the
                // functionality that depends on this permission.
            }
            return;
        }

        // other 'case' lines to check for other
        // permissions this app might request
    }



}


@Override
public void onLocationChanged(Location location)
{
    Log.i("Location Info", "Location is changed Bitchh :(");
    handleNewLocation(location);
}

private void handleNewLocation(Location location) {
    Log.d(TAG, location.toString());
}

}

我也在清单文件中给予了许可。

所以，这是运行时的错误堆栈跟踪

10-24 17:13:02.857 2224-2379/com.example.ashutosh.location E/AbstractTracker：无法在未调用 Looper.prepare() 的线程内创建处理程序 0-24 17:13:03.184 2224-2224 /com.example.ashutosh.location E/AndroidRuntime：致命异常：主进程：com.example.ashutosh.location，PID：2224 java.lang.SecurityException：客户端必须具有 ACCESS_FINE_LOCATION 权限才能请求 PRIORITY_HIGH_ACCURACY 位置。在 android.os.Parcel.readException(Parcel.java:1620) 在 android.os.Parcel.readException(Parcel.java:

4

3 回答 3

2

requestPermissions()是异步的。当它返回时，您还没有权限。甚至没有向用户询问权限。

你需要在两个地方做你的位置逻辑：

  • 预先，如果您已经获得许可

  • 在onRequestPermissionResult()中，如果您请求了权限并且用户授予了他们

此示例应用程序和此示例应用程序说明了如何请求运行时权限并将其与LocationClient.

于 2017-10-24T12:06:37.073 回答
0

试试这个顺序，

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


int permissionCheck = ContextCompat.checkSelfPermission(this,
        Manifest.permission.ACCESS_FINE_LOCATION);
int permissionCheck1 = ContextCompat.checkSelfPermission(this,
        Manifest.permission.ACCESS_COARSE_LOCATION);
if (permissionCheck != PackageManager
        .PERMISSION_GRANTED && permissionCheck1 != PackageManager.PERMISSION_GRANTED) {

    if (ActivityCompat.shouldShowRequestPermissionRationale(this,
            Manifest.permission.ACCESS_FINE_LOCATION)) {

        // Show an explanation to the user *asynchronously* -- don't block
        // this thread waiting for the user's response! After the user
        // sees the explanation, try again to request the permission.

    } else {

        // No explanation needed, we can request the permission.

        ActivityCompat.requestPermissions(this,
                new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
                MY_PERMISSIONS_REQUEST_COARSE_LOCATION);


    }
} else {

if (mGoogleApiClient==null){
    mGoogleApiClient= new GoogleApiClient.Builder(this)

            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();
}

mLocationRequest = LocationRequest.create()
        .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
        .setInterval(10 * 100)        // 10 seconds, in milliseconds
        .setFastestInterval( 1* 100); // 1 second, in milliseconds
        }
}



@Override public void onConnected(@Nullable Bundle bundle) {
mLastLocation=LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if (mLastLocation != null) {
    TextView mLatitudeText =(TextView)findViewById(R.id.textView);
    TextView mLongitudeText =(TextView)findViewById(R.id.textView2);
    mLatitudeText.setText(String.valueOf(mLastLocation.getLatitude()));
    mLongitudeText.setText(String.valueOf(mLastLocation.getLongitude()));
    Log.i("Location Info", "Location achieved!");
} else {
    Log.i("Location Info", "No location :(");
}

LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);//error here!!
}


@Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode) {
    case  MY_PERMISSIONS_REQUEST_COARSE_LOCATION :{
        // If request is cancelled, the result arrays are empty.
        if (grantResults.length > 0
                && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            Log.i("Message","Got full permission");
        if (mGoogleApiClient==null){
         mGoogleApiClient= new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();
        }
        mLocationRequest = LocationRequest.create()
        .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
        .setInterval(10 * 100)        // 10 seconds, in milliseconds
        .setFastestInterval( 1* 100); // 1 second, in milliseconds
        } else {

            // permission denied, boo! Disable the
            // functionality that depends on this permission.
        }
        return;
    }
    // other 'case' lines to check for other
    // permissions this app might request
}

}

于 2017-10-24T14:06:26.910 回答
0

我讨厌以下解决方案，但没有找到更好的解决方案。如果您从 Google API 请求位置 API 并且您这样做：.addApi(LocationServices.API)，则在连接 GoogleAPI 之前需要允许位置。

因此，

fun checkPermission(context:Context, permission:Name) : Boolean =
    ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED

fun isLocationPermissionGranted() = checkPermission(context, Manifest.permission.ACCESS_FINE_LOCATION)

if (isLocationPermissionGranted()) {
     googleApiBuilder.connect()
} else {
     MyPermissionChangeRegistrar().instance.register { 
          if (isLocationPermissionGranted()) {
               googleApiBuilder.connect()
          }
     } 
}

当权限注册器是一个在权限更改时调用回调的类

class SomeActivity: Activity() {
    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>, grantResults: IntArray) {
        MyPermissionChangeRegistrar.callCallbacks()
    }
}

恕我直言，谷歌应该在内部防止这种情况。但他们没有。

于 2017-12-05T14:08:30.917 回答