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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 com.android.settings.R;
import com.android.settings.WirelessSettings;
import android.bluetooth.BluetoothAdapter;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.preference.Preference;
import android.preference.CheckBoxPreference;
import android.provider.Settings;
import android.widget.Toast;
/**
* 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 class BluetoothEnabler implements Preference.OnPreferenceChangeListener {
private final Context mContext;
private final CheckBoxPreference mCheckBox;
private final CharSequence mOriginalSummary;
private final LocalBluetoothManager mLocalManager;
private final IntentFilter mIntentFilter;
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR);
handleStateChanged(state);
}
};
public BluetoothEnabler(Context context, CheckBoxPreference checkBox) {
mContext = context;
mCheckBox = checkBox;
mOriginalSummary = checkBox.getSummary();
checkBox.setPersistent(false);
mLocalManager = LocalBluetoothManager.getInstance(context);
if (mLocalManager == null) {
// Bluetooth is not supported
checkBox.setEnabled(false);
}
mIntentFilter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
}
public void resume() {
if (mLocalManager == null) {
return;
}
// Bluetooth state is not sticky, so set it manually
handleStateChanged(mLocalManager.getBluetoothState());
mContext.registerReceiver(mReceiver, mIntentFilter);
mCheckBox.setOnPreferenceChangeListener(this);
}
public void pause() {
if (mLocalManager == null) {
return;
}
mContext.unregisterReceiver(mReceiver);
mCheckBox.setOnPreferenceChangeListener(null);
}
public boolean onPreferenceChange(Preference preference, Object value) {
boolean enable = (Boolean) value;
// Show toast message if Bluetooth is not allowed in airplane mode
if (enable && !WirelessSettings
.isRadioAllowed(mContext, Settings.System.RADIO_BLUETOOTH)) {
Toast.makeText(mContext, R.string.wifi_in_airplane_mode,
Toast.LENGTH_SHORT).show();
return false;
}
mLocalManager.setBluetoothEnabled(enable);
mCheckBox.setEnabled(false);
// Don't update UI to opposite state until we're sure
return false;
}
/* package */ void handleStateChanged(int state) {
switch (state) {
case BluetoothAdapter.STATE_TURNING_ON:
mCheckBox.setSummary(R.string.wifi_starting);
mCheckBox.setEnabled(false);
break;
case BluetoothAdapter.STATE_ON:
mCheckBox.setChecked(true);
mCheckBox.setSummary(null);
mCheckBox.setEnabled(true);
break;
case BluetoothAdapter.STATE_TURNING_OFF:
mCheckBox.setSummary(R.string.wifi_stopping);
mCheckBox.setEnabled(false);
break;
case BluetoothAdapter.STATE_OFF:
mCheckBox.setChecked(false);
mCheckBox.setSummary(mOriginalSummary);
mCheckBox.setEnabled(true);
break;
default:
mCheckBox.setChecked(false);
mCheckBox.setSummary(R.string.wifi_error);
mCheckBox.setEnabled(true);
}
}
}
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