我正在编写一个请求位置访问的简单代码
private static int MY_PERMISSIONS_REQUEST_LOCATION = 99;
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
myview = inflater.inflate(R.layout.add_device,container,false);
// fragment manager for passing values
final FragmentManager fragmentManager = getFragmentManager();
// checking location permission and asking for permission
int permissionCheck = ContextCompat.checkSelfPermission(getActivity(),
Manifest.permission.ACCESS_FINE_LOCATION);
if(permissionCheck != 0){
ActivityCompat.requestPermissions(getActivity(),
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION);
}
当我调用 onRequestPermissionsResult 函数并对请求代码应用 switch case 时,编译器显示错误“需要常量表达式”
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch(requestCode){
case MY_PERMISSIONS_REQUEST_LOCATION: {
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// contacts-related task you need to do.
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
}
return;
}
}
}
可能是什么问题? 请注意 oncreateview 已完全复制到此处
最佳答案
使 MY_PERMISSIONS_REQUEST_LOCATION
最终化,您的问题将得到解决:
private static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;
在 case 语句中,您必须始终具有最终值。
关于android - onRequestPermissionResult 的 switch case 需要常量表达式错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48064999/