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/*
* Copyright (C) 2010 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.bluetooth;
import android.bluetooth.BluetoothAdapter;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.provider.Settings;
import android.widget.CompoundButton;
import android.widget.Switch;
import android.widget.Toast;
import com.android.settings.R;
import com.android.settings.WirelessSettings;
/**
* BluetoothEnabler is a helper to manage the Bluetooth on/off checkbox
* preference. It turns on/off Bluetooth and ensures the summary of the
* preference reflects the current state.
*/
public final class BluetoothEnabler implements CompoundButton.OnCheckedChangeListener {
private final Context mContext;
private Switch mSwitch;
private boolean mValidListener;
private final LocalBluetoothAdapter mLocalAdapter;
private final IntentFilter mIntentFilter;
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// Broadcast receiver is always running on the UI thread here,
// so we don't need consider thread synchronization.
int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR);
handleStateChanged(state);
}
};
public BluetoothEnabler(Context context, Switch switch_) {
mContext = context;
mSwitch = switch_;
mValidListener = false;
LocalBluetoothManager manager = LocalBluetoothManager.getInstance(context);
if (manager == null) {
// Bluetooth is not supported
mLocalAdapter = null;
mSwitch.setEnabled(false);
} else {
mLocalAdapter = manager.getBluetoothAdapter();
}
mIntentFilter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
}
public void resume() {
if (mLocalAdapter == null) {
mSwitch.setEnabled(false);
return;
}
// Bluetooth state is not sticky, so set it manually
handleStateChanged(mLocalAdapter.getBluetoothState());
mContext.registerReceiver(mReceiver, mIntentFilter);
mSwitch.setOnCheckedChangeListener(this);
mValidListener = true;
}
public void pause() {
if (mLocalAdapter == null) {
return;
}
mContext.unregisterReceiver(mReceiver);
mSwitch.setOnCheckedChangeListener(null);
mValidListener = false;
}
public void setSwitch(Switch switch_) {
if (mSwitch == switch_) return;
mSwitch.setOnCheckedChangeListener(null);
mSwitch = switch_;
mSwitch.setOnCheckedChangeListener(mValidListener ? this : null);
int bluetoothState = BluetoothAdapter.STATE_OFF;
if (mLocalAdapter != null) bluetoothState = mLocalAdapter.getBluetoothState();
boolean isOn = bluetoothState == BluetoothAdapter.STATE_ON;
boolean isOff = bluetoothState == BluetoothAdapter.STATE_OFF;
setChecked(isOn);
mSwitch.setEnabled(isOn || isOff);
}
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// Show toast message if Bluetooth is not allowed in airplane mode
if (isChecked &&
!WirelessSettings.isRadioAllowed(mContext, Settings.Global.RADIO_BLUETOOTH)) {
Toast.makeText(mContext, R.string.wifi_in_airplane_mode, Toast.LENGTH_SHORT).show();
// Reset switch to off
buttonView.setChecked(false);
}
if (mLocalAdapter != null) {
mLocalAdapter.setBluetoothEnabled(isChecked);
}
mSwitch.setEnabled(false);
}
void handleStateChanged(int state) {
switch (state) {
case BluetoothAdapter.STATE_TURNING_ON:
mSwitch.setEnabled(false);
break;
case BluetoothAdapter.STATE_ON:
setChecked(true);
mSwitch.setEnabled(true);
break;
case BluetoothAdapter.STATE_TURNING_OFF:
mSwitch.setEnabled(false);
break;
case BluetoothAdapter.STATE_OFF:
setChecked(false);
mSwitch.setEnabled(true);
break;
default:
setChecked(false);
mSwitch.setEnabled(true);
}
}
private void setChecked(boolean isChecked) {
if (isChecked != mSwitch.isChecked()) {
// set listener to null, so onCheckedChanged won't be called
// if the checked status on Switch isn't changed by user click
if (mValidListener) {
mSwitch.setOnCheckedChangeListener(null);
}
mSwitch.setChecked(isChecked);
if (mValidListener) {
mSwitch.setOnCheckedChangeListener(this);
}
}
}
}
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