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/*
* Copyright (C) 2011 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.app.DialogFragment;
import android.bluetooth.BluetoothAdapter;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.res.Configuration;
import android.os.Bundle;
import android.text.Editable;
import android.text.InputFilter;
import android.text.TextWatcher;
import android.util.Log;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.WindowManager;
import android.view.inputmethod.EditorInfo;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import com.android.settings.R;
import com.android.settingslib.bluetooth.LocalBluetoothAdapter;
import com.android.settingslib.bluetooth.LocalBluetoothManager;
/**
* Dialog fragment for renaming the local Bluetooth device.
*/
public final class BluetoothNameDialogFragment extends DialogFragment implements TextWatcher {
private static final int BLUETOOTH_NAME_MAX_LENGTH_BYTES = 248;
private AlertDialog mAlertDialog;
private Button mOkButton;
// accessed from inner class (not private to avoid thunks)
static final String TAG = "BluetoothNameDialogFragment";
final LocalBluetoothAdapter mLocalAdapter;
EditText mDeviceNameView;
// This flag is set when the name is updated by code, to distinguish from user changes
private boolean mDeviceNameUpdated;
// This flag is set when the user edits the name (preserved on rotation)
private boolean mDeviceNameEdited;
// Key to save the edited name and edit status for restoring after rotation
private static final String KEY_NAME = "device_name";
private static final String KEY_NAME_EDITED = "device_name_edited";
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action.equals(BluetoothAdapter.ACTION_LOCAL_NAME_CHANGED)) {
updateDeviceName();
} else if (action.equals(BluetoothAdapter.ACTION_STATE_CHANGED) &&
(intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR) ==
BluetoothAdapter.STATE_ON)) {
updateDeviceName();
}
}
};
public BluetoothNameDialogFragment() {
LocalBluetoothManager localManager = Utils.getLocalBtManager(getActivity());
mLocalAdapter = localManager.getBluetoothAdapter();
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
String deviceName = mLocalAdapter.getName();
if (savedInstanceState != null) {
deviceName = savedInstanceState.getString(KEY_NAME, deviceName);
mDeviceNameEdited = savedInstanceState.getBoolean(KEY_NAME_EDITED, false);
}
mAlertDialog = new AlertDialog.Builder(getActivity())
.setTitle(R.string.bluetooth_rename_device)
.setView(createDialogView(deviceName))
.setPositiveButton(R.string.bluetooth_rename_button,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
String deviceName = mDeviceNameView.getText().toString();
setDeviceName(deviceName);
}
})
.setNegativeButton(android.R.string.cancel, null)
.create();
mAlertDialog.getWindow().setSoftInputMode(
WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
return mAlertDialog;
}
private void setDeviceName(String deviceName) {
Log.d(TAG, "Setting device name to " + deviceName);
mLocalAdapter.setName(deviceName);
}
@Override
public void onSaveInstanceState(Bundle outState) {
outState.putString(KEY_NAME, mDeviceNameView.getText().toString());
outState.putBoolean(KEY_NAME_EDITED, mDeviceNameEdited);
}
private View createDialogView(String deviceName) {
final LayoutInflater layoutInflater = (LayoutInflater)getActivity()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = layoutInflater.inflate(R.layout.dialog_edittext, null);
mDeviceNameView = (EditText) view.findViewById(R.id.edittext);
mDeviceNameView.setFilters(new InputFilter[] {
new Utf8ByteLengthFilter(BLUETOOTH_NAME_MAX_LENGTH_BYTES)
});
mDeviceNameView.setText(deviceName); // set initial value before adding listener
mDeviceNameView.addTextChangedListener(this);
mDeviceNameView.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (actionId == EditorInfo.IME_ACTION_DONE) {
setDeviceName(v.getText().toString());
mAlertDialog.dismiss();
return true; // action handled
} else {
return false; // not handled
}
}
});
return view;
}
@Override
public void onDestroy() {
super.onDestroy();
mAlertDialog = null;
mDeviceNameView = null;
mOkButton = null;
}
@Override
public void onResume() {
super.onResume();
if (mOkButton == null) {
mOkButton = mAlertDialog.getButton(DialogInterface.BUTTON_POSITIVE);
mOkButton.setEnabled(mDeviceNameEdited); // Ok button enabled after user edits
}
IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
filter.addAction(BluetoothAdapter.ACTION_LOCAL_NAME_CHANGED);
getActivity().registerReceiver(mReceiver, filter);
}
@Override
public void onPause() {
super.onPause();
getActivity().unregisterReceiver(mReceiver);
}
void updateDeviceName() {
if (mLocalAdapter != null && mLocalAdapter.isEnabled()) {
mDeviceNameUpdated = true;
mDeviceNameEdited = false;
mDeviceNameView.setText(mLocalAdapter.getName());
}
}
public void afterTextChanged(Editable s) {
if (mDeviceNameUpdated) {
// Device name changed by code; disable Ok button until edited by user
mDeviceNameUpdated = false;
mOkButton.setEnabled(false);
} else {
mDeviceNameEdited = true;
if (mOkButton != null) {
mOkButton.setEnabled(s.toString().trim().length() != 0);
}
}
}
public void onConfigurationChanged(Configuration newConfig, CharSequence s) {
super.onConfigurationChanged(newConfig);
if (mOkButton != null) {
mOkButton.setEnabled(s.length() != 0 && !(s.toString().trim().isEmpty()));
}
}
/* Not used */
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
/* Not used */
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
}
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