1 /* 2 * Copyright (C) 2010 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.bluetooth; 18 19 import android.bluetooth.BluetoothAdapter; 20 import android.content.BroadcastReceiver; 21 import android.content.Context; 22 import android.content.Intent; 23 import android.content.IntentFilter; 24 import android.provider.Settings; 25 import android.widget.CompoundButton; 26 import android.widget.Switch; 27 import android.widget.Toast; 28 29 import com.android.settings.R; 30 import com.android.settings.WirelessSettings; 31 32 /** 33 * BluetoothEnabler is a helper to manage the Bluetooth on/off checkbox 34 * preference. It turns on/off Bluetooth and ensures the summary of the 35 * preference reflects the current state. 36 */ 37 public final class BluetoothEnabler implements CompoundButton.OnCheckedChangeListener { 38 private final Context mContext; 39 private Switch mSwitch; 40 41 private final LocalBluetoothAdapter mLocalAdapter; 42 private final IntentFilter mIntentFilter; 43 44 private final BroadcastReceiver mReceiver = new BroadcastReceiver() { 45 @Override 46 public void onReceive(Context context, Intent intent) { 47 int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR); 48 handleStateChanged(state); 49 } 50 }; 51 BluetoothEnabler(Context context, Switch switch_)52 public BluetoothEnabler(Context context, Switch switch_) { 53 mContext = context; 54 mSwitch = switch_; 55 56 LocalBluetoothManager manager = LocalBluetoothManager.getInstance(context); 57 if (manager == null) { 58 // Bluetooth is not supported 59 mLocalAdapter = null; 60 mSwitch.setEnabled(false); 61 } else { 62 mLocalAdapter = manager.getBluetoothAdapter(); 63 } 64 mIntentFilter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED); 65 } 66 resume()67 public void resume() { 68 if (mLocalAdapter == null) { 69 mSwitch.setEnabled(false); 70 return; 71 } 72 73 // Bluetooth state is not sticky, so set it manually 74 handleStateChanged(mLocalAdapter.getBluetoothState()); 75 76 mContext.registerReceiver(mReceiver, mIntentFilter); 77 mSwitch.setOnCheckedChangeListener(this); 78 } 79 pause()80 public void pause() { 81 if (mLocalAdapter == null) { 82 return; 83 } 84 85 mContext.unregisterReceiver(mReceiver); 86 mSwitch.setOnCheckedChangeListener(null); 87 } 88 setSwitch(Switch switch_)89 public void setSwitch(Switch switch_) { 90 if (mSwitch == switch_) return; 91 mSwitch.setOnCheckedChangeListener(null); 92 mSwitch = switch_; 93 mSwitch.setOnCheckedChangeListener(this); 94 95 int bluetoothState = BluetoothAdapter.STATE_OFF; 96 if (mLocalAdapter != null) bluetoothState = mLocalAdapter.getBluetoothState(); 97 boolean isOn = bluetoothState == BluetoothAdapter.STATE_ON; 98 boolean isOff = bluetoothState == BluetoothAdapter.STATE_OFF; 99 mSwitch.setChecked(isOn); 100 mSwitch.setEnabled(isOn || isOff); 101 } 102 onCheckedChanged(CompoundButton buttonView, boolean isChecked)103 public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { 104 // Show toast message if Bluetooth is not allowed in airplane mode 105 if (isChecked && 106 !WirelessSettings.isRadioAllowed(mContext, Settings.System.RADIO_BLUETOOTH)) { 107 Toast.makeText(mContext, R.string.wifi_in_airplane_mode, Toast.LENGTH_SHORT).show(); 108 // Reset switch to off 109 buttonView.setChecked(false); 110 } 111 112 if (mLocalAdapter != null) { 113 mLocalAdapter.setBluetoothEnabled(isChecked); 114 } 115 mSwitch.setEnabled(false); 116 } 117 handleStateChanged(int state)118 void handleStateChanged(int state) { 119 switch (state) { 120 case BluetoothAdapter.STATE_TURNING_ON: 121 mSwitch.setEnabled(false); 122 break; 123 case BluetoothAdapter.STATE_ON: 124 mSwitch.setChecked(true); 125 mSwitch.setEnabled(true); 126 break; 127 case BluetoothAdapter.STATE_TURNING_OFF: 128 mSwitch.setEnabled(false); 129 break; 130 case BluetoothAdapter.STATE_OFF: 131 mSwitch.setChecked(false); 132 mSwitch.setEnabled(true); 133 break; 134 default: 135 mSwitch.setChecked(false); 136 mSwitch.setEnabled(true); 137 } 138 } 139 } 140