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      1 /*
      2  * Copyright (C) 2007 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 
     17 package com.android.settings;
     18 
     19 import android.content.Context;
     20 import android.content.Intent;
     21 import android.database.ContentObserver;
     22 import android.os.Handler;
     23 import android.os.Message;
     24 import android.os.SystemProperties;
     25 import android.os.UserHandle;
     26 import android.preference.CheckBoxPreference;
     27 import android.preference.Preference;
     28 import android.provider.Settings;
     29 
     30 import com.android.internal.telephony.PhoneStateIntentReceiver;
     31 import com.android.internal.telephony.TelephonyProperties;
     32 
     33 public class AirplaneModeEnabler implements Preference.OnPreferenceChangeListener {
     34 
     35     private final Context mContext;
     36 
     37     private PhoneStateIntentReceiver mPhoneStateReceiver;
     38 
     39     private final CheckBoxPreference mCheckBoxPref;
     40 
     41     private static final int EVENT_SERVICE_STATE_CHANGED = 3;
     42 
     43     private Handler mHandler = new Handler() {
     44         @Override
     45         public void handleMessage(Message msg) {
     46             switch (msg.what) {
     47                 case EVENT_SERVICE_STATE_CHANGED:
     48                     onAirplaneModeChanged();
     49                     break;
     50             }
     51         }
     52     };
     53 
     54     private ContentObserver mAirplaneModeObserver = new ContentObserver(new Handler()) {
     55         @Override
     56         public void onChange(boolean selfChange) {
     57             onAirplaneModeChanged();
     58         }
     59     };
     60 
     61     public AirplaneModeEnabler(Context context, CheckBoxPreference airplaneModeCheckBoxPreference) {
     62 
     63         mContext = context;
     64         mCheckBoxPref = airplaneModeCheckBoxPreference;
     65 
     66         airplaneModeCheckBoxPreference.setPersistent(false);
     67 
     68         mPhoneStateReceiver = new PhoneStateIntentReceiver(mContext, mHandler);
     69         mPhoneStateReceiver.notifyServiceState(EVENT_SERVICE_STATE_CHANGED);
     70     }
     71 
     72     public void resume() {
     73 
     74         mCheckBoxPref.setChecked(isAirplaneModeOn(mContext));
     75 
     76         mPhoneStateReceiver.registerIntent();
     77         mCheckBoxPref.setOnPreferenceChangeListener(this);
     78         mContext.getContentResolver().registerContentObserver(
     79                 Settings.Global.getUriFor(Settings.Global.AIRPLANE_MODE_ON), true,
     80                 mAirplaneModeObserver);
     81     }
     82 
     83     public void pause() {
     84         mPhoneStateReceiver.unregisterIntent();
     85         mCheckBoxPref.setOnPreferenceChangeListener(null);
     86         mContext.getContentResolver().unregisterContentObserver(mAirplaneModeObserver);
     87     }
     88 
     89     public static boolean isAirplaneModeOn(Context context) {
     90         return Settings.Global.getInt(context.getContentResolver(),
     91                 Settings.Global.AIRPLANE_MODE_ON, 0) != 0;
     92     }
     93 
     94     private void setAirplaneModeOn(boolean enabling) {
     95         // Change the system setting
     96         Settings.Global.putInt(mContext.getContentResolver(), Settings.Global.AIRPLANE_MODE_ON,
     97                                 enabling ? 1 : 0);
     98         // Update the UI to reflect system setting
     99         mCheckBoxPref.setChecked(enabling);
    100 
    101         // Post the intent
    102         Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED);
    103         intent.putExtra("state", enabling);
    104         mContext.sendBroadcastAsUser(intent, UserHandle.ALL);
    105     }
    106 
    107     /**
    108      * Called when we've received confirmation that the airplane mode was set.
    109      * TODO: We update the checkbox summary when we get notified
    110      * that mobile radio is powered up/down. We should not have dependency
    111      * on one radio alone. We need to do the following:
    112      * - handle the case of wifi/bluetooth failures
    113      * - mobile does not send failure notification, fail on timeout.
    114      */
    115     private void onAirplaneModeChanged() {
    116         mCheckBoxPref.setChecked(isAirplaneModeOn(mContext));
    117     }
    118 
    119     /**
    120      * Called when someone clicks on the checkbox preference.
    121      */
    122     public boolean onPreferenceChange(Preference preference, Object newValue) {
    123         if (Boolean.parseBoolean(
    124                     SystemProperties.get(TelephonyProperties.PROPERTY_INECM_MODE))) {
    125             // In ECM mode, do not update database at this point
    126         } else {
    127             setAirplaneModeOn((Boolean) newValue);
    128         }
    129         return true;
    130     }
    131 
    132     public void setAirplaneModeInECM(boolean isECMExit, boolean isAirplaneModeOn) {
    133         if (isECMExit) {
    134             // update database based on the current checkbox state
    135             setAirplaneModeOn(isAirplaneModeOn);
    136         } else {
    137             // update summary
    138             onAirplaneModeChanged();
    139         }
    140     }
    141 
    142 }
    143