1/*
2 * Copyright (C) 2011 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
17package com.android.settings.wifi.p2p;
18
19import com.android.settings.R;
20
21import android.content.BroadcastReceiver;
22import android.content.Context;
23import android.content.Intent;
24import android.content.IntentFilter;
25import android.net.wifi.p2p.WifiP2pManager;
26import android.os.Message;
27import android.preference.CheckBoxPreference;
28import android.preference.Preference;
29import android.provider.Settings;
30import android.util.Log;
31
32/**
33 * WifiP2pEnabler is a helper to manage the Wifi p2p on/off
34 */
35public class WifiP2pEnabler implements Preference.OnPreferenceChangeListener {
36    private static final String TAG = "WifiP2pEnabler";
37
38    private final Context mContext;
39    private final CheckBoxPreference mCheckBox;
40    private final IntentFilter mIntentFilter;
41    private WifiP2pManager mWifiP2pManager;
42    private WifiP2pManager.Channel mChannel;
43
44    private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
45        @Override
46        public void onReceive(Context context, Intent intent) {
47            String action = intent.getAction();
48
49            if (WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION.equals(action)) {
50                handleP2pStateChanged(intent.getIntExtra(
51                        WifiP2pManager.EXTRA_WIFI_STATE, WifiP2pManager.WIFI_P2P_STATE_DISABLED));
52            }
53        }
54    };
55
56    public WifiP2pEnabler(Context context, CheckBoxPreference checkBox) {
57        mContext = context;
58        mCheckBox = checkBox;
59
60        mWifiP2pManager = (WifiP2pManager) context.getSystemService(Context.WIFI_P2P_SERVICE);
61        if (mWifiP2pManager != null) {
62            mChannel = mWifiP2pManager.initialize(mContext, mContext.getMainLooper(), null);
63            if (mChannel == null) {
64                //Failure to set up connection
65                Log.e(TAG, "Failed to set up connection with wifi p2p service");
66                mWifiP2pManager = null;
67                mCheckBox.setEnabled(false);
68            }
69        } else {
70            Log.e(TAG, "mWifiP2pManager is null!");
71        }
72        mIntentFilter = new IntentFilter(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
73
74    }
75
76    public void resume() {
77        if (mWifiP2pManager == null) return;
78        mContext.registerReceiver(mReceiver, mIntentFilter);
79        mCheckBox.setOnPreferenceChangeListener(this);
80    }
81
82    public void pause() {
83        if (mWifiP2pManager == null) return;
84        mContext.unregisterReceiver(mReceiver);
85        mCheckBox.setOnPreferenceChangeListener(null);
86    }
87
88    public boolean onPreferenceChange(Preference preference, Object value) {
89
90        if (mWifiP2pManager == null) return false;
91
92        mCheckBox.setEnabled(false);
93        final boolean enable = (Boolean) value;
94        if (enable) {
95            mWifiP2pManager.enableP2p(mChannel);
96        } else {
97            mWifiP2pManager.disableP2p(mChannel);
98        }
99        return false;
100    }
101
102    private void handleP2pStateChanged(int state) {
103        mCheckBox.setEnabled(true);
104        switch (state) {
105            case WifiP2pManager.WIFI_P2P_STATE_ENABLED:
106                mCheckBox.setChecked(true);
107                break;
108            case WifiP2pManager.WIFI_P2P_STATE_DISABLED:
109                mCheckBox.setChecked(false);
110                break;
111            default:
112                Log.e(TAG,"Unhandled wifi state " + state);
113                break;
114        }
115    }
116
117}
118