android - 无法获取 Android 应用的位置权限

Question

我的 list 中有以下内容:

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

我还在手机设置中设置了位置权限。

是的，手机上启用了 GPS。

在这里，我检查权限:

        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {
            int hasLocationPermission = mContext.checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION);
            Log.d(TAG, "location permission: " + hasLocationPermission); // 0

            if (hasLocationPermission != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(mContext, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);
            }
            hasLocationPermission = mContext.checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION);
            Log.d(TAG, "location permission: " + hasLocationPermission); // still 0
        }

如果我在我的 list 和手机的应用程序设置中获得许可，为什么它仍然阻止我访问该位置？因此，纬度和经度都返回 0.0。

Answer 1

声明你在哪里使用 Oncreate 或其他

    if (Build.VERSION.SDK_INT >= 23){


    if (checkPermission(Manifest.permission.ACCESS_FINE_LOCATION,getApplicationContext(),this)) {
    //You fetch the Location here

    //code to use the 
    }
    else
    {
    requestPermission(Manifest.permission.ACCESS_FINE_LOCATION,PERMISSION_REQUEST_CODE_LOCATION,getApplicationContext(),this);
    }

    }

也在类里面声明

    public static void requestPermission(String strPermission,int perCode,Context _c,Activity _a){

    if (ActivityCompat.shouldShowRequestPermissionRationale(_a,strPermission)){
        Toast.makeText(getApplicationContext(),"GPS permission allows us to access location data. Please allow in App Settings for additional functionality.",Toast.LENGTH_LONG).show();
        } else {

        ActivityCompat.requestPermissions(_a,new String[]{strPermission},perCode);
        }
    }

public static boolean checkPermission(String strPermission,Context _c,Activity _a){
    int result = ContextCompat.checkSelfPermission(_c, strPermission);
    if (result == PackageManager.PERMISSION_GRANTED){

        return true;

    } else {

        return false;

    }
    }

@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
    switch (requestCode) {

    case PERMISSION_REQUEST_CODE_LOCATION:
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

        fetchLocationData();

        } else {

        Toast.makeText(getApplicationContext(),"Permission Denied, You cannot access location data.",Toast.LENGTH_LONG).show();

        }
        break;

    }
}

对于其他较低的设备，您应该在声明时给予许可