Home | History | Annotate | Download | only in connecteddevice 
      1 /*
      2  * Copyright 2018 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package com.android.settings.connecteddevice;
     17 
     18 import android.content.Context;
     19 import android.content.pm.PackageManager;
     20 import android.support.annotation.VisibleForTesting;
     21 import android.support.v7.preference.Preference;
     22 import android.support.v7.preference.PreferenceScreen;
     23 
     24 import android.util.Log;
     25 import com.android.settings.bluetooth.BluetoothDeviceUpdater;
     26 import com.android.settings.bluetooth.SavedBluetoothDeviceUpdater;
     27 import com.android.settings.core.BasePreferenceController;
     28 import com.android.settings.dashboard.DashboardFragment;
     29 
     30 import com.android.settingslib.core.lifecycle.LifecycleObserver;
     31 import com.android.settingslib.core.lifecycle.events.OnStart;
     32 import com.android.settingslib.core.lifecycle.events.OnStop;
     33 import com.android.settingslib.utils.ThreadUtils;
     34 
     35 public class PreviouslyConnectedDevicePreferenceController extends BasePreferenceController
     36         implements LifecycleObserver, OnStart, OnStop, DevicePreferenceCallback {
     37 
     38     private Preference mPreference;
     39     private BluetoothDeviceUpdater mBluetoothDeviceUpdater;
     40     private int mPreferenceSize;
     41 
     42     public PreviouslyConnectedDevicePreferenceController(Context context, String preferenceKey) {
     43         super(context, preferenceKey);
     44     }
     45 
     46     @Override
     47     public int getAvailabilityStatus() {
     48         return mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH)
     49                 ? AVAILABLE
     50                 : CONDITIONALLY_UNAVAILABLE;
     51     }
     52 
     53     @Override
     54     public void displayPreference(PreferenceScreen screen) {
     55         super.displayPreference(screen);
     56         if (isAvailable()) {
     57             mPreference = screen.findPreference(getPreferenceKey());
     58             mBluetoothDeviceUpdater.setPrefContext(screen.getContext());
     59         }
     60     }
     61 
     62     @Override
     63     public void onStart() {
     64         mBluetoothDeviceUpdater.registerCallback();
     65         updatePreferenceOnSizeChanged();
     66     }
     67 
     68     @Override
     69     public void onStop() {
     70         mBluetoothDeviceUpdater.unregisterCallback();
     71     }
     72 
     73     public void init(DashboardFragment fragment) {
     74         mBluetoothDeviceUpdater = new SavedBluetoothDeviceUpdater(fragment.getContext(),
     75                 fragment, PreviouslyConnectedDevicePreferenceController.this);
     76     }
     77 
     78     @Override
     79     public void onDeviceAdded(Preference preference) {
     80         mPreferenceSize++;
     81         updatePreferenceOnSizeChanged();
     82     }
     83 
     84     @Override
     85     public void onDeviceRemoved(Preference preference) {
     86         mPreferenceSize--;
     87         updatePreferenceOnSizeChanged();
     88     }
     89 
     90     @VisibleForTesting
     91     void setBluetoothDeviceUpdater(BluetoothDeviceUpdater bluetoothDeviceUpdater) {
     92         mBluetoothDeviceUpdater = bluetoothDeviceUpdater;
     93     }
     94 
     95     @VisibleForTesting
     96     void setPreferenceSize(int size) {
     97         mPreferenceSize = size;
     98     }
     99 
    100     @VisibleForTesting
    101     void setPreference(Preference preference) {
    102         mPreference = preference;
    103     }
    104 
    105     private void updatePreferenceOnSizeChanged() {
    106         if (isAvailable()) {
    107             mPreference.setEnabled(mPreferenceSize != 0);
    108         }
    109     }
    110 }