/*
* 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.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.text.Editable;
import android.text.Html;
import android.text.InputFilter;
import android.text.InputType;
import android.text.Spanned;
import android.text.TextWatcher;
import android.text.InputFilter.LengthFilter;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.TextView;
import com.android.internal.app.AlertActivity;
import com.android.internal.app.AlertController;
import com.android.settings.R;
import android.view.KeyEvent;
/**
* BluetoothPairingDialog asks the user to enter a PIN / Passkey / simple confirmation
* for pairing with a remote Bluetooth device. It is an activity that appears as a dialog.
*/
public final class BluetoothPairingDialog extends AlertActivity implements
CompoundButton.OnCheckedChangeListener, DialogInterface.OnClickListener, TextWatcher {
private static final String TAG = "BluetoothPairingDialog";
private static final int BLUETOOTH_PIN_MAX_LENGTH = 16;
private static final int BLUETOOTH_PASSKEY_MAX_LENGTH = 6;
private BluetoothDevice mDevice;
private int mType;
private String mPairingKey;
private EditText mPairingView;
private Button mOkButton;
/**
* Dismiss the dialog if the bond state changes to bonded or none,
* or if pairing was canceled for {@link #mDevice}.
*/
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {
int bondState = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE,
BluetoothDevice.ERROR);
if (bondState == BluetoothDevice.BOND_BONDED ||
bondState == BluetoothDevice.BOND_NONE) {
dismiss();
}
} else if (BluetoothDevice.ACTION_PAIRING_CANCEL.equals(action)) {
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if (device == null || device.equals(mDevice)) {
dismiss();
}
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
if (!intent.getAction().equals(BluetoothDevice.ACTION_PAIRING_REQUEST))
{
Log.e(TAG, "Error: this activity may be started only with intent " +
BluetoothDevice.ACTION_PAIRING_REQUEST);
finish();
return;
}
LocalBluetoothManager manager = LocalBluetoothManager.getInstance(this);
if (manager == null) {
Log.e(TAG, "Error: BluetoothAdapter not supported by system");
finish();
return;
}
CachedBluetoothDeviceManager deviceManager = manager.getCachedDeviceManager();
mDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
mType = intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT, BluetoothDevice.ERROR);
switch (mType) {
case BluetoothDevice.PAIRING_VARIANT_PIN:
case BluetoothDevice.PAIRING_VARIANT_PASSKEY:
createUserEntryDialog(deviceManager);
break;
case BluetoothDevice.PAIRING_VARIANT_PASSKEY_CONFIRMATION:
int passkey =
intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_KEY, BluetoothDevice.ERROR);
if (passkey == BluetoothDevice.ERROR) {
Log.e(TAG, "Invalid Confirmation Passkey received, not showing any dialog");
return;
}
mPairingKey = String.format("%06d", passkey);
createConfirmationDialog(deviceManager);
break;
case BluetoothDevice.PAIRING_VARIANT_CONSENT:
case BluetoothDevice.PAIRING_VARIANT_OOB_CONSENT:
createConsentDialog(deviceManager);
break;
case BluetoothDevice.PAIRING_VARIANT_DISPLAY_PASSKEY:
case BluetoothDevice.PAIRING_VARIANT_DISPLAY_PIN:
int pairingKey =
intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_KEY, BluetoothDevice.ERROR);
if (pairingKey == BluetoothDevice.ERROR) {
Log.e(TAG, "Invalid Confirmation Passkey or PIN received, not showing any dialog");
return;
}
if (mType == BluetoothDevice.PAIRING_VARIANT_DISPLAY_PASSKEY) {
mPairingKey = String.format("%06d", pairingKey);
} else {
mPairingKey = String.format("%04d", pairingKey);
}
createDisplayPasskeyOrPinDialog(deviceManager);
break;
default:
Log.e(TAG, "Incorrect pairing type received, not showing any dialog");
}
/*
* Leave this registered through pause/resume since we still want to
* finish the activity in the background if pairing is canceled.
*/
registerReceiver(mReceiver, new IntentFilter(BluetoothDevice.ACTION_PAIRING_CANCEL));
registerReceiver(mReceiver, new IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED));
}
private void createUserEntryDialog(CachedBluetoothDeviceManager deviceManager) {
final AlertController.AlertParams p = mAlertParams;
p.mIconId = android.R.drawable.ic_dialog_info;
p.mTitle = getString(R.string.bluetooth_pairing_request);
p.mView = createPinEntryView(deviceManager.getName(mDevice));
p.mPositiveButtonText = getString(android.R.string.ok);
p.mPositiveButtonListener = this;
p.mNegativeButtonText = getString(android.R.string.cancel);
p.mNegativeButtonListener = this;
setupAlert();
mOkButton = mAlert.getButton(BUTTON_POSITIVE);
mOkButton.setEnabled(false);
}
private View createPinEntryView(String deviceName) {
View view = getLayoutInflater().inflate(R.layout.bluetooth_pin_entry, null);
TextView messageView = (TextView) view.findViewById(R.id.message);
TextView messageView2 = (TextView) view.findViewById(R.id.message_below_pin);
CheckBox alphanumericPin = (CheckBox) view.findViewById(R.id.alphanumeric_pin);
mPairingView = (EditText) view.findViewById(R.id.text);
mPairingView.addTextChangedListener(this);
alphanumericPin.setOnCheckedChangeListener(this);
int messageId1;
int messageId2;
int maxLength;
switch (mType) {
case BluetoothDevice.PAIRING_VARIANT_PIN:
messageId1 = R.string.bluetooth_enter_pin_msg;
messageId2 = R.string.bluetooth_enter_pin_other_device;
// Maximum of 16 characters in a PIN
maxLength = BLUETOOTH_PIN_MAX_LENGTH;
break;
case BluetoothDevice.PAIRING_VARIANT_PASSKEY:
messageId1 = R.string.bluetooth_enter_passkey_msg;
messageId2 = R.string.bluetooth_enter_passkey_other_device;
// Maximum of 6 digits for passkey
maxLength = BLUETOOTH_PASSKEY_MAX_LENGTH;
alphanumericPin.setVisibility(View.GONE);
break;
default:
Log.e(TAG, "Incorrect pairing type for createPinEntryView: " + mType);
return null;
}
// Format the message string, then parse HTML style tags
String messageText = getString(messageId1, deviceName);
messageView.setText(Html.fromHtml(messageText));
messageView2.setText(messageId2);
mPairingView.setInputType(InputType.TYPE_CLASS_NUMBER);
mPairingView.setFilters(new InputFilter[] {
new LengthFilter(maxLength) });
return view;
}
private View createView(CachedBluetoothDeviceManager deviceManager) {
View view = getLayoutInflater().inflate(R.layout.bluetooth_pin_confirm, null);
String name = deviceManager.getName(mDevice);
TextView messageView = (TextView) view.findViewById(R.id.message);
String messageText; // formatted string containing HTML style tags
switch (mType) {
case BluetoothDevice.PAIRING_VARIANT_PASSKEY_CONFIRMATION:
messageText = getString(R.string.bluetooth_confirm_passkey_msg,
name, mPairingKey);
break;
case BluetoothDevice.PAIRING_VARIANT_CONSENT:
case BluetoothDevice.PAIRING_VARIANT_OOB_CONSENT:
messageText = getString(R.string.bluetooth_incoming_pairing_msg, name);
break;
case BluetoothDevice.PAIRING_VARIANT_DISPLAY_PASSKEY:
case BluetoothDevice.PAIRING_VARIANT_DISPLAY_PIN:
messageText = getString(R.string.bluetooth_display_passkey_pin_msg, name,
mPairingKey);
break;
default:
Log.e(TAG, "Incorrect pairing type received, not creating view");
return null;
}
messageView.setText(Html.fromHtml(messageText));
return view;
}
private void createConfirmationDialog(CachedBluetoothDeviceManager deviceManager) {
final AlertController.AlertParams p = mAlertParams;
p.mIconId = android.R.drawable.ic_dialog_info;
p.mTitle = getString(R.string.bluetooth_pairing_request);
p.mView = createView(deviceManager);
p.mPositiveButtonText = getString(R.string.bluetooth_pairing_accept);
p.mPositiveButtonListener = this;
p.mNegativeButtonText = getString(R.string.bluetooth_pairing_decline);
p.mNegativeButtonListener = this;
setupAlert();
}
private void createConsentDialog(CachedBluetoothDeviceManager deviceManager) {
final AlertController.AlertParams p = mAlertParams;
p.mIconId = android.R.drawable.ic_dialog_info;
p.mTitle = getString(R.string.bluetooth_pairing_request);
p.mView = createView(deviceManager);
p.mPositiveButtonText = getString(R.string.bluetooth_pairing_accept);
p.mPositiveButtonListener = this;
p.mNegativeButtonText = getString(R.string.bluetooth_pairing_decline);
p.mNegativeButtonListener = this;
setupAlert();
}
private void createDisplayPasskeyOrPinDialog(
CachedBluetoothDeviceManager deviceManager) {
final AlertController.AlertParams p = mAlertParams;
p.mIconId = android.R.drawable.ic_dialog_info;
p.mTitle = getString(R.string.bluetooth_pairing_request);
p.mView = createView(deviceManager);
p.mNegativeButtonText = getString(android.R.string.cancel);
p.mNegativeButtonListener = this;
setupAlert();
// Since its only a notification, send an OK to the framework,
// indicating that the dialog has been displayed.
if (mType == BluetoothDevice.PAIRING_VARIANT_DISPLAY_PASSKEY) {
mDevice.setPairingConfirmation(true);
} else if (mType == BluetoothDevice.PAIRING_VARIANT_DISPLAY_PIN) {
byte[] pinBytes = BluetoothDevice.convertPinToBytes(mPairingKey);
mDevice.setPin(pinBytes);
}
}
@Override
protected void onDestroy() {
super.onDestroy();
unregisterReceiver(mReceiver);
}
public void afterTextChanged(Editable s) {
if (mOkButton != null) {
mOkButton.setEnabled(s.length() > 0);
}
}
private void onPair(String value) {
switch (mType) {
case BluetoothDevice.PAIRING_VARIANT_PIN:
byte[] pinBytes = BluetoothDevice.convertPinToBytes(value);
if (pinBytes == null) {
return;
}
mDevice.setPin(pinBytes);
break;
case BluetoothDevice.PAIRING_VARIANT_PASSKEY:
int passkey = Integer.parseInt(value);
mDevice.setPasskey(passkey);
break;
case BluetoothDevice.PAIRING_VARIANT_PASSKEY_CONFIRMATION:
case BluetoothDevice.PAIRING_VARIANT_CONSENT:
mDevice.setPairingConfirmation(true);
break;
case BluetoothDevice.PAIRING_VARIANT_DISPLAY_PASSKEY:
case BluetoothDevice.PAIRING_VARIANT_DISPLAY_PIN:
// Do nothing.
break;
case BluetoothDevice.PAIRING_VARIANT_OOB_CONSENT:
mDevice.setRemoteOutOfBandData();
break;
default:
Log.e(TAG, "Incorrect pairing type received");
}
}
private void onCancel() {
mDevice.cancelPairingUserInput();
}
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
onCancel();
}
return super.onKeyDown(keyCode,event);
}
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case BUTTON_POSITIVE:
if (mPairingView != null) {
onPair(mPairingView.getText().toString());
} else {
onPair(null);
}
break;
case BUTTON_NEGATIVE:
default:
onCancel();
break;
}
}
/* 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) {
}
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// change input type for soft keyboard to numeric or alphanumeric
if (isChecked) {
mPairingView.setInputType(InputType.TYPE_CLASS_TEXT);
} else {
mPairingView.setInputType(InputType.TYPE_CLASS_NUMBER);
}
}
}