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/*
* Copyright (C) 2008 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.app.AlertDialog;
import android.app.Dialog;
import android.bluetooth.BluetoothAdapter;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.preference.EditTextPreference;
import android.text.Editable;
import android.text.InputFilter;
import android.text.TextWatcher;
import android.text.InputFilter.LengthFilter;
import android.util.AttributeSet;
import android.widget.Button;
import android.widget.EditText;
/**
* BluetoothNamePreference is the preference type for editing the device's
* Bluetooth name. It asks the user for a name, and persists it via the
* Bluetooth API.
*/
public class BluetoothNamePreference extends EditTextPreference implements TextWatcher {
private static final String TAG = "BluetoothNamePreference";
// TODO(): Investigate bluetoothd/dbus crash when length is set to 248, limit as per spec.
private static final int BLUETOOTH_NAME_MAX_LENGTH = 200;
private LocalBluetoothManager mLocalManager;
private BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action.equals(BluetoothAdapter.ACTION_LOCAL_NAME_CHANGED)) {
setSummaryToName();
} else if (action.equals(BluetoothAdapter.ACTION_STATE_CHANGED) &&
(intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR) ==
BluetoothAdapter.STATE_ON)) {
setSummaryToName();
}
}
};
public BluetoothNamePreference(Context context, AttributeSet attrs) {
super(context, attrs);
mLocalManager = LocalBluetoothManager.getInstance(context);
setSummaryToName();
}
public void resume() {
IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
filter.addAction(BluetoothAdapter.ACTION_LOCAL_NAME_CHANGED);
getContext().registerReceiver(mReceiver, filter);
// Make sure the OK button is disabled (if necessary) after rotation
EditText et = getEditText();
et.setFilters(new InputFilter[] {new LengthFilter(BLUETOOTH_NAME_MAX_LENGTH)});
if (et != null) {
et.addTextChangedListener(this);
Dialog d = getDialog();
if (d instanceof AlertDialog) {
Button b = ((AlertDialog) d).getButton(AlertDialog.BUTTON_POSITIVE);
b.setEnabled(et.getText().length() > 0);
}
}
}
public void pause() {
EditText et = getEditText();
if (et != null) {
et.removeTextChangedListener(this);
}
getContext().unregisterReceiver(mReceiver);
}
private void setSummaryToName() {
BluetoothAdapter adapter = mLocalManager.getBluetoothAdapter();
if (adapter.isEnabled()) {
setSummary(adapter.getName());
}
}
@Override
protected boolean persistString(String value) {
BluetoothAdapter adapter = mLocalManager.getBluetoothAdapter();
adapter.setName(value);
return true;
}
@Override
protected void onClick() {
super.onClick();
// The dialog should be created by now
EditText et = getEditText();
if (et != null) {
et.setText(mLocalManager.getBluetoothAdapter().getName());
}
}
// TextWatcher interface
public void afterTextChanged(Editable s) {
Dialog d = getDialog();
if (d instanceof AlertDialog) {
((AlertDialog) d).getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(s.length() > 0);
}
}
// TextWatcher interface
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
// not used
}
// TextWatcher interface
public void onTextChanged(CharSequence s, int start, int before, int count) {
// not used
}
}
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