应用在故意不授予位置权限后退出

Question

当我在弹出权限请求屏幕时故意不做任何事情时，就会发生此问题，应用程序将在几秒钟后崩溃。

权限请求在从另一个活动(登录活动(转换到地图活动后弹出。

登录活动

if statement to check the validity
    if valid
        Intent intent = new Intent(LoginActivity.this,MapActivity.class);
        startActivity(intent);
        finish();

地图活动

...    
public void onMapReady(GoogleMap map) {
    mMap = map;
    getLocationPermission();
    updateLocationUI();
    getDeviceLocation();
}
private void getLocationPermission() {
    if (ContextCompat.checkSelfPermission(this.getApplicationContext(),
            android.Manifest.permission.ACCESS_FINE_LOCATION)
            == PackageManager.PERMISSION_GRANTED) {
        mLocationPermissionGranted = true;
    } else {
        ActivityCompat.requestPermissions(this,
                new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION},
                PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION);
    }
}

Answer 1

刚刚意识到如何使用简单的解决方案来解决这个问题 lmao...在我的原始代码中，我已经有 onRequestPermissionResult(( 顺便说一句。

地图活动

private boolean mLocationPermissionGranted;
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) {
    mLocationPermissionGranted = false;
    switch (requestCode) {
        case PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION: {
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                mLocationPermissionGranted = true;
            }
        }
    }
    updateLocationUI();
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
...
getLocationPermission();
    if(mLocationPermissionGranted){
        updateLocationUI();
        getDeviceLocation();
    }
}

现在不再崩溃:)

Answer 2

我正在以这种方式检查权限，并且可以正常工作，请尝试这样做：-

if (checkLocationPermission()) {
                    Log.e("Tag", "Camera and External storage Permission's are allowed");
                } else {
                    requestLocationPermission();
                } 

这是检查位置权限的方法：-

private boolean checkLocationPermission() {
        int result = ContextCompat.checkSelfPermission(this,
                Manifest.permission.ACCESS_FINE_LOCATION);
        if (result == PackageManager.PERMISSION_GRANTED) {
            return true;
        } else {
            return false;
        }
    }

这是位置的请求方法：-

private void requestLocationPermission() {
        if (ActivityCompat.shouldShowRequestPermissionRationale
                        (this, Manifest.permission.ACCESS_FINE_LOCATION)) {
            AlertDialog.Builder alertDialog = new AlertDialog.Builder(this, R.style.DialogTheme);
            alertDialog.setMessage("You Have To Give Permission From Your Device Setting To go in Setting Please Click on Settings Button");
            alertDialog.setCancelable(false);
            alertDialog.setPositiveButton("Go To Settings", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    Uri uri = Uri.fromParts("package", getPackageName(), null);
                    intent.setData(uri);
                    startActivity(intent);
                }
            });
            alertDialog.show();
        } else {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1012);
        }
    }

最后在请求权限结果：-

@Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        if (grantResults.length > 0 && grantResults[0] != PackageManager.PERMISSION_GRANTED) {
            AlertDialog.Builder alertDialog = new AlertDialog.Builder(this, R.style.DialogTheme);
            alertDialog.setMessage("You Have To Give Permission From Your Device Setting To go in Setting Please Click on Settings Button");
            alertDialog.setCancelable(false);
            alertDialog.setPositiveButton("Go To Settings", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    Uri uri = Uri.fromParts("package", getPackageName(), null);
                    intent.setData(uri);
                    startActivity(intent);
                }
            });
            alertDialog.show();
        }else{
          // do your stuff in case accept permission
        }
    }