Android-请求运行时权限 [英] Android - Requesting Runtime Permissions

问题描述

我试图了解如何在Android中为危险权限"(例如位置)请求运行时权限.

I am trying to understand how to request Runtime Permissions in android for "Dangerous permissions" like Location.

我了解的是，代码应该像这样

What i understand is that the code should go like this

public void checkPermission(){ 
  if (ActivityCompat.checkSelfPermission(..) == PackageManager.PERMISSION_GRANTED){

    getLocation();

  } else {

    ActivityCompat.requestPermissions(..);

  }
}

public void onRequestPermissionsResult(..){
  switch (requestCode) {
    case MY_PERMISSIONS_REQUEST: {
      if (..) {
                // permission was granted, yay!
                getLocation();
            } else {
                // permission denied, boo!
            }
            return;
        }
     }
}

public Location getLocation(){
  locationManager.requestLocationUpdates(..)
  ..
}

问题是，这段代码给我locationManager错误，告诉我我必须请求位置权限

The thing is, this code gives me error on locationManager telling me i have to request the location permission

那么这个序列的问题是什么?

So what is the proplem with this sequence?

推荐答案

尝试一下，它对我有用

private void checkPermission() {
    if (ContextCompat.checkSelfPermission(this,
            Manifest.permission.ACCESS_FINE_LOCATION)
            != PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(this,
            Manifest.permission.ACCESS_COARSE_LOCATION)
            != PackageManager.PERMISSION_GRANTED) {

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

    } else {
        getLocation();
    }
}

@Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        case MY_PERMISSIONS_REQUEST_FINE_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.
             getLocation();
            } else {
                // permission denied, boo! Disable the
            }
            return;
        }
    }
}

这篇关于Android-请求运行时权限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！