| /* |
| * Copyright 2013 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.storageprovider; |
| |
| |
| import android.content.SharedPreferences; |
| import android.os.Bundle; |
| import android.provider.DocumentsContract; |
| import android.support.v4.app.Fragment; |
| import android.view.Menu; |
| import android.view.MenuItem; |
| |
| import com.example.android.common.logger.Log; |
| |
| /** |
| * Toggles the user's login status via a login menu option, and enables/disables the cloud storage |
| * content provider. |
| */ |
| public class MyCloudFragment extends Fragment { |
| |
| private static final String TAG = "MyCloudFragment"; |
| private static final String AUTHORITY = "com.example.android.storageprovider.documents"; |
| private boolean mLoggedIn = false; |
| |
| @Override |
| public void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| mLoggedIn = readLoginValue(); |
| |
| setHasOptionsMenu(true); |
| } |
| |
| @Override |
| public void onPrepareOptionsMenu(Menu menu) { |
| super.onPrepareOptionsMenu(menu); |
| MenuItem item = menu.findItem(R.id.action_toggle_login); |
| item.setTitle(mLoggedIn ? R.string.log_out : R.string.log_in); |
| } |
| |
| @Override |
| public boolean onOptionsItemSelected(MenuItem item) { |
| if (item.getItemId() == R.id.action_toggle_login) { |
| toggleLogin(); |
| item.setTitle(mLoggedIn ? R.string.log_out : R.string.log_in); |
| |
| // BEGIN_INCLUDE(notify_change) |
| // Notify the system that the status of our roots has changed. This will trigger |
| // a call to MyCloudProvider.queryRoots() and force a refresh of the system |
| // picker UI. It's important to call this or stale results may persist. |
| getActivity().getContentResolver().notifyChange(DocumentsContract.buildRootsUri |
| (AUTHORITY), null, false); |
| // END_INCLUDE(notify_change) |
| } |
| return true; |
| } |
| |
| /** |
| * Dummy function to change the user's authorization status. |
| */ |
| private void toggleLogin() { |
| // Replace this with your standard method of authentication to determine if your app |
| // should make the user's documents available. |
| mLoggedIn = !mLoggedIn; |
| writeLoginValue(mLoggedIn); |
| Log.i(TAG, getString(mLoggedIn ? R.string.logged_in_info : R.string.logged_out_info)); |
| } |
| |
| /** |
| * Dummy function to save whether the user is logged in. |
| */ |
| private void writeLoginValue(boolean loggedIn) { |
| final SharedPreferences sharedPreferences = |
| getActivity().getSharedPreferences(getString(R.string.app_name), |
| getActivity().MODE_PRIVATE); |
| sharedPreferences.edit().putBoolean(getString(R.string.key_logged_in), loggedIn).commit(); |
| } |
| |
| /** |
| * Dummy function to determine whether the user is logged in. |
| */ |
| private boolean readLoginValue() { |
| final SharedPreferences sharedPreferences = |
| getActivity().getSharedPreferences(getString(R.string.app_name), |
| getActivity().MODE_PRIVATE); |
| return sharedPreferences.getBoolean(getString(R.string.key_logged_in), false); |
| } |
| |
| } |
| |
| |