| /* |
| * Copyright (C) 2018 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.android.settings.connecteddevice; |
| |
| import android.bluetooth.BluetoothAdapter; |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.content.pm.PackageManager; |
| |
| import androidx.preference.Preference; |
| import androidx.preference.PreferenceScreen; |
| |
| import com.android.settings.R; |
| import com.android.settings.core.BasePreferenceController; |
| import com.android.settingslib.core.lifecycle.LifecycleObserver; |
| import com.android.settingslib.core.lifecycle.events.OnStart; |
| import com.android.settingslib.core.lifecycle.events.OnStop; |
| |
| /** |
| * Controller to maintain the {@link androidx.preference.Preference} for add |
| * device. It monitor Bluetooth's status(on/off) and decide if need to show summary or not. |
| */ |
| public class AddDevicePreferenceController extends BasePreferenceController |
| implements LifecycleObserver, OnStart, OnStop { |
| |
| private Preference mPreference; |
| private final BroadcastReceiver mReceiver = new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| updateState(); |
| } |
| }; |
| private IntentFilter mIntentFilter; |
| private BluetoothAdapter mBluetoothAdapter; |
| |
| public AddDevicePreferenceController(Context context, String key) { |
| super(context, key); |
| mIntentFilter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED); |
| mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); |
| } |
| |
| @Override |
| public void onStart() { |
| mContext.registerReceiver(mReceiver, mIntentFilter); |
| } |
| |
| @Override |
| public void onStop() { |
| mContext.unregisterReceiver(mReceiver); |
| } |
| |
| @Override |
| public void displayPreference(PreferenceScreen screen) { |
| super.displayPreference(screen); |
| if (isAvailable()) { |
| mPreference = (Preference) screen.findPreference(getPreferenceKey()); |
| } |
| } |
| |
| @Override |
| public int getAvailabilityStatus() { |
| return mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH) |
| ? AVAILABLE |
| : UNSUPPORTED_ON_DEVICE; |
| } |
| |
| @Override |
| public CharSequence getSummary() { |
| return mBluetoothAdapter != null && mBluetoothAdapter.isEnabled() |
| ? "" |
| : mContext.getString(R.string.connected_device_add_device_summary); |
| } |
| |
| void updateState() { |
| updateState(mPreference); |
| } |
| } |