Question

我在我的活动中添加了 - 运行时的位置权限检查 - 但我仍然收到错误，告诉我添加权限检查... 这是我的代码。在Oncreate（）中我添加了：

if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
           bPermissionGranted = checkLocationPermission();
         }

on onConnected：

    public void onConnected(Bundle bundle) {

    if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (bPermissionGranted) {
            Location location =     LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
            LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);

            handleNewLocation(location);

        } else {

            Location location = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
            LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);

            handleNewLocation(location);
        }
    }
}

这两种方法：

    public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;

public boolean checkLocationPermission() {
    if (ContextCompat.checkSelfPermission(this,
            Manifest.permission.ACCESS_FINE_LOCATION)
            != PackageManager.PERMISSION_GRANTED) {

        // Should we show an explanation?
        if (ActivityCompat.shouldShowRequestPermissionRationale(this,
                Manifest.permission.ACCESS_FINE_LOCATION)) {

            // Show an expanation 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.

            //Prompt the user once explanation has been shown
            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
                    MY_PERMISSIONS_REQUEST_LOCATION);


        } else {
            // No explanation needed, we can request the permission.
            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
                    MY_PERMISSIONS_REQUEST_LOCATION);
        }
        return false;
    } else {
        return true;
    }
}

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

                // permission was granted, yay! Do the
                // contacts-related task you need to do.

                Location location = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
                LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);

                handleNewLocation(location);


            } else {

                // permission denied, boo! Disable the
                // functionality that depends on this permission.
                Toast.makeText(this, "permission denied", Toast.LENGTH_LONG).show();
            }
            return;
        }

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

它仍然标有以下红色错误：

Location location =  LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);

Answer 1

你的代码有点好。不要在onCreate中检查权限。请在onConnected()方法中进行检查，因为用户可能尚未授予权限，并且之前已执行onConnected()。

然后，当您在onRequestPermissionsResult()中收到权限结果时，如果结果为正，则开始提取位置更新。

也是一个建议 -

if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)

这段代码是多余的。 Android仅在Android M及更高版本中需要运行时权限，因此只有在Android版本高于M时才会执行权限检查代码，否则将无法执行。

添加位置权限检查运行时仍然会出错

1 个答案: