Java代码中的Android位置权限检查

我正试图在API 23上的google MapsActivity上使用android定位服务。我在清单文件中拥有以下权限：

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />

它显示了一个生成权限检查代码的错误（如下）。我也不知道该进入街区什么地方；似乎条件语句已经在进行必要的检查

if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            //    ActivityCompat#requestPermissions
            // here to request the missing permissions, and then overriding
            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. See the documentation
            // for ActivityCompat#requestPermissions for more details.
            return;
        }

似乎我在此条件中输入的任何内容都会导致错误。

尝试以下操作：

if (ContextCompat.checkSelfPermission(App.getContext(),
                    android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {

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

                    ActivityCompat.requestPermissions(getActivity(), new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, LOCATION_PERMISSION_REQUEST_CODE);
                }

            } else { // no need to ask for permission

                // start to find location...
            }

并加上：

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

        if (requestCode == LOCATION_PERMISSION_REQUEST_CODE) {

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

                // start to find location...

            } else { // if permission is not granted

                // decide what you want to do if you don't get permissions
            }
        }
    }

LOCATION\u PERMISSION\u REQUEST\u code

是您在类中设置的

final int

（例如1252）

另请阅读，了解权限最佳做法。

尝试以下方法：

if (ContextCompat.checkSelfPermission(App.getContext(),
                    android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {

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

                    ActivityCompat.requestPermissions(getActivity(), new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, LOCATION_PERMISSION_REQUEST_CODE);
                }

            } else { // no need to ask for permission

                // start to find location...
            }

并加上：

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

        if (requestCode == LOCATION_PERMISSION_REQUEST_CODE) {

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

                // start to find location...

            } else { // if permission is not granted

                // decide what you want to do if you don't get permissions
            }
        }
    }

LOCATION\u PERMISSION\u REQUEST\u code

是您在类中设置的

final int

（例如1252）

---

另请阅读，了解权限最佳做法。

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