| /* |
| * 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.Manifest |
| import android.content.pm.PackageManager |
| import android.os.Bundle |
| import android.support.design.widget.Snackbar |
| import android.support.v4.app.ActivityCompat |
| import android.support.v7.app.AppCompatActivity |
| import android.util.Log |
| import android.view.View |
| import com.example.android.system.runtimepermissions.camera.CameraPreviewFragment |
| import com.example.android.system.runtimepermissions.contacts.ContactsFragment |
| import com.example.android.system.runtimepermissions.extensions.batchRequestPermissions |
| import com.example.android.system.runtimepermissions.extensions.containsOnly |
| import com.example.android.system.runtimepermissions.extensions.isPermissionGranted |
| import com.example.android.system.runtimepermissions.extensions.requestPermission |
| import com.example.android.system.runtimepermissions.extensions.shouldShowPermissionRationale |
| import kotlinx.android.synthetic.main.activity_main.* |
| |
| /** |
| * Launcher Activity that demonstrates the use of runtime permissions for Android M. |
| * It contains a summary sample description, sample log and a Fragment that calls callbacks on this |
| * Activity to illustrate parts of the runtime permissions API. |
| * |
| * |
| * This Activity requests permissions to access the camera ([android.Manifest.permission.CAMERA]) |
| * when the 'Show Camera' button is clicked to display the camera preview. |
| * Contacts permissions (([android.Manifest.permission.READ_CONTACTS] and ([ ][android.Manifest.permission.WRITE_CONTACTS])) are requested when the 'Show and Add Contacts' |
| * button is |
| * clicked to display the first contact in the contacts database and to add a dummy contact |
| * directly to it. Permissions are verified and requested through compat helpers in the support v4 |
| * library, in this Activity using [ActivityCompat]. |
| * First, permissions are checked if they have already been granted through [ ][ActivityCompat.checkSelfPermission]. |
| * If permissions have not been granted, they are requested through |
| * [ActivityCompat.requestPermissions] and the return value checked |
| * in |
| * a callback to the [android.support.v4.app.ActivityCompat.OnRequestPermissionsResultCallback] |
| * interface. |
| * |
| * |
| * Before requesting permissions, [ActivityCompat.shouldShowRequestPermissionRationale] |
| * should be called to provide the user with additional context for the use of permissions if they |
| * have been denied previously. |
| * |
| * |
| * If this sample is executed on a device running a platform version below M, all permissions |
| * declared |
| * in the Android manifest file are always granted at install time and cannot be requested at run |
| * time. |
| * |
| * |
| * This sample targets the M platform and must therefore request permissions at runtime. Change the |
| * targetSdk in the file 'Application/build.gradle' to 22 to run the application in compatibility |
| * mode. |
| * Now, if a permission has been disable by the system through the application settings, disabled |
| * APIs provide compatibility data. |
| * For example the camera cannot be opened or an empty list of contacts is returned. No special |
| * action is required in this case. |
| * |
| * |
| * (This class is based on the MainActivity used in the SimpleFragment sample template.) |
| */ |
| class MainActivity : AppCompatActivity(), ActivityCompat.OnRequestPermissionsResultCallback { |
| |
| override fun onCreate(savedInstanceState: Bundle?) { |
| super.onCreate(savedInstanceState) |
| setContentView(R.layout.activity_main) |
| if (savedInstanceState == null) { |
| supportFragmentManager.beginTransaction().apply { |
| replace(R.id.sampleContentFragment, RuntimePermissionsFragment()) |
| }.commit() |
| } |
| } |
| |
| /** |
| * Called when the 'show camera' button is clicked. |
| * Callback is defined in resource layout definition. |
| */ |
| fun showCamera(view: View) { |
| Log.i(TAG, "Show camera button pressed. Checking permission.") |
| // Check if the Camera permission is already available. |
| if (!isPermissionGranted(Manifest.permission.CAMERA)) { |
| // Camera permission has not been granted. |
| requestCameraPermission() |
| } else { |
| // Camera permissions is already available, show the camera preview. |
| Log.i(TAG, |
| "CAMERA permission has already been granted. Displaying camera preview.") |
| showCameraPreview() |
| } |
| } |
| |
| /** |
| * Requests the Camera permission. |
| * If the permission has been denied previously, a SnackBar will prompt the user to grant the |
| * permission, otherwise it is requested directly. |
| */ |
| private fun requestCameraPermission() { |
| Log.i(TAG, "CAMERA permission has NOT been granted. Requesting permission.") |
| if (shouldShowPermissionRationale(Manifest.permission.CAMERA)) { |
| // Provide an additional rationale to the user if the permission was not granted |
| // and the user would benefit from additional context for the use of the permission. |
| // For example if the user has previously denied the permission. |
| Log.i(TAG, "Displaying camera permission rationale to provide additional context.") |
| Snackbar.make(mainLayout, R.string.permission_camera_rationale, |
| Snackbar.LENGTH_INDEFINITE) |
| .setAction(R.string.ok, { |
| requestPermission(Manifest.permission.CAMERA, REQUEST_CAMERA) |
| }) |
| .show() |
| } else { |
| |
| // Camera permission has not been granted yet. Request it directly. |
| requestPermission(Manifest.permission.CAMERA, REQUEST_CAMERA) |
| } |
| } |
| |
| /** |
| * Called when the 'show camera' button is clicked. |
| * Callback is defined in resource layout definition. |
| */ |
| fun showContacts(view: View) { |
| Log.i(TAG, "Show contacts button pressed. Checking permissions.") |
| |
| // Verify that all required contact permissions have been granted. |
| if (!isPermissionGranted(Manifest.permission.READ_CONTACTS) || |
| !isPermissionGranted(Manifest.permission.WRITE_CONTACTS)) { |
| // Contacts permissions have not been granted. |
| Log.i(TAG, "Contact permissions has NOT been granted. Requesting permissions.") |
| requestContactsPermissions() |
| } else { |
| // Contact permissions have been granted. Show the contacts fragment. |
| Log.i(TAG, |
| "Contact permissions have already been granted. Displaying contact details.") |
| showContactDetails() |
| } |
| } |
| |
| /** |
| * Requests the Contacts permissions. |
| * If the permission has been denied previously, a Snackbar will prompt the user to grant the |
| * permission, otherwise it is requested directly. |
| */ |
| private fun requestContactsPermissions() { |
| if (shouldShowPermissionRationale(Manifest.permission.READ_CONTACTS) || |
| shouldShowPermissionRationale(Manifest.permission.WRITE_CONTACTS)) { |
| |
| // Provide an additional rationale to the user if the permission was not granted |
| // and the user would benefit from additional context for the use of the permission. |
| // For example, if the request has been denied previously. |
| Log.i(TAG, "Displaying contacts permission rationale to provide additional context.") |
| |
| // Display a SnackBar with an explanation and a button to trigger the request. |
| Snackbar.make(mainLayout, R.string.permission_contacts_rationale, |
| Snackbar.LENGTH_INDEFINITE) |
| .setAction(R.string.ok, { |
| batchRequestPermissions(PERMISSIONS_CONTACT, REQUEST_CONTACTS) |
| }) |
| .show() |
| } else { |
| // Contact permissions have not been granted yet. Request them directly. |
| batchRequestPermissions(PERMISSIONS_CONTACT, REQUEST_CONTACTS) |
| } |
| } |
| |
| /** |
| * Display the [CameraPreviewFragment] in the content area if the required Camera |
| * permission has been granted. |
| */ |
| private fun showCameraPreview() { |
| supportFragmentManager.beginTransaction() |
| .replace(R.id.sampleContentFragment, CameraPreviewFragment.newInstance()) |
| .addToBackStack("contacts") |
| .commit() |
| } |
| |
| /** |
| * Display the [ContactsFragment] in the content area if the required contacts |
| * permissions have been granted. |
| */ |
| private fun showContactDetails() { |
| supportFragmentManager.beginTransaction() |
| .replace(R.id.sampleContentFragment, ContactsFragment.newInstance()) |
| .addToBackStack("contacts") |
| .commit() |
| } |
| |
| /** |
| * Callback received when a permissions request has been completed. |
| */ |
| override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>, |
| grantResults: IntArray) { |
| |
| if (requestCode == REQUEST_CAMERA) { |
| // Received permission result for camera permission. |
| Log.i(TAG, "Received response for Camera permission request.") |
| |
| // Check if the permission has been granted |
| if (grantResults.containsOnly(PackageManager.PERMISSION_GRANTED)) { |
| // Camera permission has been granted, preview can be displayed |
| Log.i(TAG, "CAMERA permission has now been granted. Showing preview.") |
| Snackbar.make(mainLayout, R.string.permision_available_camera, |
| Snackbar.LENGTH_SHORT).show() |
| } else { |
| Log.i(TAG, "CAMERA permission was NOT granted.") |
| Snackbar.make(mainLayout, R.string.permissions_not_granted, |
| Snackbar.LENGTH_SHORT).show() |
| |
| } |
| } else if (requestCode == REQUEST_CONTACTS) { |
| Log.i(TAG, "Received response for contact permissions request.") |
| |
| // We have requested multiple permissions for contacts, so all of them need to be |
| // checked. |
| if (grantResults.containsOnly(PackageManager.PERMISSION_GRANTED)) { |
| // All required permissions have been granted, display contacts fragment. |
| Snackbar.make(mainLayout, R.string.permision_available_contacts, |
| Snackbar.LENGTH_SHORT) |
| .show() |
| } else { |
| Log.i(TAG, "Contacts permissions were NOT granted.") |
| Snackbar.make(mainLayout, R.string.permissions_not_granted, |
| Snackbar.LENGTH_SHORT) |
| .show() |
| } |
| |
| } else { |
| super.onRequestPermissionsResult(requestCode, permissions, grantResults) |
| } |
| } |
| |
| fun onBackClick(view: View) { |
| supportFragmentManager.popBackStack() |
| } |
| |
| companion object { |
| |
| const val TAG = "MainActivity" |
| /** |
| * Id to identify a camera permission request. |
| */ |
| const val REQUEST_CAMERA = 0 |
| /** |
| * Id to identify a contacts permission request. |
| */ |
| const val REQUEST_CONTACTS = 1 |
| /** |
| * Permissions required to read and write contacts. Used by the [ContactsFragment]. |
| */ |
| val PERMISSIONS_CONTACT = arrayOf(Manifest.permission.READ_CONTACTS, |
| Manifest.permission.WRITE_CONTACTS) |
| } |
| } |