prebuilts/gradle/RuntimePermissions/kotlinApp/app/src/main/java/com/example/android/system/runtimepermissions/RuntimePermissionsFragment.kt

/*
* Copyright 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package com.example.android.system.runtimepermissions

import android.os.Build
import android.os.Bundle
import android.support.v4.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import kotlinx.android.synthetic.main.fragment_main.*

class RuntimePermissionsFragment : Fragment() {

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
            savedInstanceState: Bundle?): View =
            inflater.inflate(R.layout.fragment_main, container, false).apply {
                if (Build.VERSION.SDK_INT < 23) {
                    /*
                    The contacts permissions have been declared in the AndroidManifest for Android M
                    and above only. They are not available on older platforms, so we are hiding the
                    button to access the contacts database.
                    This shows how new runtime-only permissions can be added, that do not apply to
                    older platform versions. This can be useful for automated updates where
                    additional permissions might prompt the user on upgrade.
                     */
                    contactsButton.visibility = View.GONE
                }
            }
}