BluetoothPairingDialog.java revision e79f990490de49b39097433707c2bae6d8238330 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.settings.bluetooth;
18
19import android.bluetooth.BluetoothDevice;
20import android.content.BroadcastReceiver;
21import android.content.Context;
22import android.content.DialogInterface;
23import android.content.Intent;
24import android.content.IntentFilter;
25import android.os.Bundle;
26import android.text.Editable;
27import android.text.InputFilter;
28import android.text.InputType;
29import android.text.TextWatcher;
30import android.text.InputFilter.LengthFilter;
31import android.util.Log;
32import android.view.View;
33import android.widget.Button;
34import android.widget.EditText;
35import android.widget.TextView;
36
37import com.android.internal.app.AlertActivity;
38import com.android.internal.app.AlertController;
39import com.android.settings.R;
40
41/**
42 * BluetoothPairingDialog asks the user to enter a PIN / Passkey / simple confirmation
43 * for pairing with a remote Bluetooth device. It is an activity that appears as a dialog.
44 */
45public class BluetoothPairingDialog extends AlertActivity implements DialogInterface.OnClickListener,
46        TextWatcher {
47    private static final String TAG = "BluetoothPairingDialog";
48
49    private static final int BLUETOOTH_PIN_MAX_LENGTH = 16;
50    private static final int BLUETOOTH_PASSKEY_MAX_LENGTH = 6;
51    private LocalBluetoothManager mLocalManager;
52    private BluetoothDevice mDevice;
53    private int mType;
54    private String mPasskey;
55    private EditText mPairingView;
56    private Button mOkButton;
57
58    private BroadcastReceiver mReceiver = new BroadcastReceiver() {
59        @Override
60        public void onReceive(Context context, Intent intent) {
61            if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(intent.getAction())) {
62                int bondState = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE,
63                                                   BluetoothDevice.ERROR);
64                if (bondState == BluetoothDevice.BOND_BONDED ||
65                        bondState == BluetoothDevice.BOND_NONE) {
66                    dismissDialog();
67                }
68            } else if(BluetoothDevice.ACTION_PAIRING_CANCEL.equals(intent.getAction())) {
69                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
70                if (device == null || device.equals(mDevice)) {
71                    dismissDialog();
72                }
73            }
74        }
75    };
76
77    @Override
78    protected void onCreate(Bundle savedInstanceState) {
79        super.onCreate(savedInstanceState);
80
81        Intent intent = getIntent();
82        if (!intent.getAction().equals(BluetoothDevice.ACTION_PAIRING_REQUEST))
83        {
84            Log.e(TAG,
85                  "Error: this activity may be started only with intent " +
86                  BluetoothDevice.ACTION_PAIRING_REQUEST);
87            finish();
88        }
89
90        mLocalManager = LocalBluetoothManager.getInstance(this);
91        mDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
92        mType = intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT, BluetoothDevice.ERROR);
93        if (mType == BluetoothDevice.PAIRING_VARIANT_PIN) {
94            createUserEntryDialog();
95        } else if (mType == BluetoothDevice.PAIRING_VARIANT_PASSKEY) {
96            createUserEntryDialog();
97        } else if (mType == BluetoothDevice.PAIRING_VARIANT_PASSKEY_CONFIRMATION){
98            int passkey =
99                intent.getIntExtra(BluetoothDevice.EXTRA_PASSKEY, BluetoothDevice.ERROR);
100            if (passkey == BluetoothDevice.ERROR) {
101                Log.e(TAG, "Invalid ConfirmationPasskey received, not showing any dialog");
102                return;
103            }
104            mPasskey = String.format("%06d", passkey);
105            createConfirmationDialog();
106        } else if (mType == BluetoothDevice.PAIRING_VARIANT_CONSENT) {
107            createConsentDialog();
108        } else if (mType == BluetoothDevice.PAIRING_VARIANT_DISPLAY_PASSKEY) {
109            int passkey =
110                intent.getIntExtra(BluetoothDevice.EXTRA_PASSKEY, BluetoothDevice.ERROR);
111            if (passkey == BluetoothDevice.ERROR) {
112                Log.e(TAG, "Invalid ConfirmationPasskey received, not showing any dialog");
113                return;
114            }
115            mPasskey = String.format("%06d", passkey);
116            createDisplayPasskeyDialog();
117        } else if (mType == BluetoothDevice.PAIRING_VARIANT_OOB_CONSENT) {
118            createConsentDialog();
119        } else {
120            Log.e(TAG, "Incorrect pairing type received, not showing any dialog");
121        }
122
123        /*
124         * Leave this registered through pause/resume since we still want to
125         * finish the activity in the background if pairing is canceled.
126         */
127        registerReceiver(mReceiver, new IntentFilter(BluetoothDevice.ACTION_PAIRING_CANCEL));
128        registerReceiver(mReceiver, new IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED));
129    }
130
131    private void createUserEntryDialog() {
132        final AlertController.AlertParams p = mAlertParams;
133        p.mIconId = android.R.drawable.ic_dialog_info;
134        p.mTitle = getString(R.string.bluetooth_pairing_request);
135        p.mView = createView();
136        p.mPositiveButtonText = getString(android.R.string.ok);
137        p.mPositiveButtonListener = this;
138        p.mNegativeButtonText = getString(android.R.string.cancel);
139        p.mNegativeButtonListener = this;
140        setupAlert();
141
142        mOkButton = mAlert.getButton(DialogInterface.BUTTON_POSITIVE);
143        mOkButton.setEnabled(false);
144    }
145
146    private View createView() {
147        View view = getLayoutInflater().inflate(R.layout.bluetooth_pin_entry, null);
148
149        String name = mLocalManager.getCachedDeviceManager().getName(mDevice);
150        TextView messageView = (TextView) view.findViewById(R.id.message);
151        mPairingView = (EditText) view.findViewById(R.id.text);
152        mPairingView.addTextChangedListener(this);
153
154        if (mType == BluetoothDevice.PAIRING_VARIANT_PIN) {
155            messageView.setText(getString(R.string.bluetooth_enter_pin_msg, name));
156            // Maximum of 16 characters in a PIN adb sync
157            mPairingView.setFilters(new InputFilter[] {
158                    new LengthFilter(BLUETOOTH_PIN_MAX_LENGTH) });
159        } else if (mType == BluetoothDevice.PAIRING_VARIANT_PASSKEY){
160            messageView.setText(getString(R.string.bluetooth_enter_passkey_msg, name));
161            // Maximum of 6 digits for passkey
162            mPairingView.setInputType(InputType.TYPE_CLASS_NUMBER |
163                    InputType.TYPE_NUMBER_FLAG_SIGNED);
164            mPairingView.setFilters(new InputFilter[] {
165                    new LengthFilter(BLUETOOTH_PASSKEY_MAX_LENGTH)});
166        } else if (mType == BluetoothDevice.PAIRING_VARIANT_PASSKEY_CONFIRMATION) {
167            mPairingView.setVisibility(View.GONE);
168            messageView.setText(getString(R.string.bluetooth_confirm_passkey_msg, name,
169                    mPasskey));
170        } else if (mType == BluetoothDevice.PAIRING_VARIANT_CONSENT) {
171            mPairingView.setVisibility(View.GONE);
172            messageView.setText(getString(R.string.bluetooth_incoming_pairing_msg, name));
173        } else if (mType == BluetoothDevice.PAIRING_VARIANT_DISPLAY_PASSKEY) {
174            mPairingView.setVisibility(View.GONE);
175            messageView.setText(getString(R.string.bluetooth_display_passkey_msg, name, mPasskey));
176        } else if (mType == BluetoothDevice.PAIRING_VARIANT_OOB_CONSENT) {
177            mPairingView.setVisibility(View.GONE);
178            messageView.setText(getString(R.string.bluetooth_incoming_pairing_msg, name));
179        } else {
180            Log.e(TAG, "Incorrect pairing type received, not creating view");
181        }
182        return view;
183    }
184
185    private void createConfirmationDialog() {
186        final AlertController.AlertParams p = mAlertParams;
187        p.mIconId = android.R.drawable.ic_dialog_info;
188        p.mTitle = getString(R.string.bluetooth_pairing_request);
189        p.mView = createView();
190        p.mPositiveButtonText = getString(R.string.bluetooth_pairing_accept);
191        p.mPositiveButtonListener = this;
192        p.mNegativeButtonText = getString(R.string.bluetooth_pairing_decline);
193        p.mNegativeButtonListener = this;
194        setupAlert();
195    }
196
197    private void createConsentDialog() {
198        final AlertController.AlertParams p = mAlertParams;
199        p.mIconId = android.R.drawable.ic_dialog_info;
200        p.mTitle = getString(R.string.bluetooth_pairing_request);
201        p.mView = createView();
202        p.mPositiveButtonText = getString(R.string.bluetooth_pairing_accept);
203        p.mPositiveButtonListener = this;
204        p.mNegativeButtonText = getString(R.string.bluetooth_pairing_decline);
205        p.mNegativeButtonListener = this;
206        setupAlert();
207    }
208
209    private void createDisplayPasskeyDialog() {
210        final AlertController.AlertParams p = mAlertParams;
211        p.mIconId = android.R.drawable.ic_dialog_info;
212        p.mTitle = getString(R.string.bluetooth_pairing_request);
213        p.mView = createView();
214        p.mPositiveButtonText = getString(android.R.string.ok);
215        p.mPositiveButtonListener = this;
216        setupAlert();
217
218        // Since its only a notification, send an OK to the framework,
219        // indicating that the dialog has been displayed.
220        mDevice.setPairingConfirmation(true);
221    }
222
223    @Override
224    protected void onDestroy() {
225        super.onDestroy();
226        unregisterReceiver(mReceiver);
227    }
228
229    public void afterTextChanged(Editable s) {
230        if (s.length() > 0) {
231            mOkButton.setEnabled(true);
232        }
233    }
234
235    private void dismissDialog() {
236        this.dismiss();
237    }
238
239    private void onPair(String value) {
240        if (mType == BluetoothDevice.PAIRING_VARIANT_PIN) {
241            byte[] pinBytes = BluetoothDevice.convertPinToBytes(value);
242            if (pinBytes == null) {
243                return;
244            }
245            mDevice.setPin(pinBytes);
246        } else if (mType == BluetoothDevice.PAIRING_VARIANT_PASSKEY) {
247            int passkey = Integer.parseInt(value);
248            mDevice.setPasskey(passkey);
249        } else if (mType == BluetoothDevice.PAIRING_VARIANT_PASSKEY_CONFIRMATION) {
250            mDevice.setPairingConfirmation(true);
251        } else if (mType ==  BluetoothDevice.PAIRING_VARIANT_CONSENT) {
252            mDevice.setPairingConfirmation(true);
253        } else if (mType == BluetoothDevice.PAIRING_VARIANT_DISPLAY_PASSKEY) {
254            // Do Nothing.
255        } else if (mType == BluetoothDevice.PAIRING_VARIANT_OOB_CONSENT) {
256            mDevice.setRemoteOutOfBandData();
257        } else {
258            Log.e(TAG, "Incorrect pairing type received");
259        }
260    }
261
262    private void onCancel() {
263        mDevice.cancelPairingUserInput();
264    }
265
266    public void onClick(DialogInterface dialog, int which) {
267        switch (which) {
268            case DialogInterface.BUTTON_POSITIVE:
269                onPair(mPairingView.getText().toString());
270                break;
271
272            case DialogInterface.BUTTON_NEGATIVE:
273                onCancel();
274                break;
275        }
276    }
277
278    /* Not used */
279    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
280    }
281
282    /* Not used */
283    public void onTextChanged(CharSequence s, int start, int before, int count) {
284    }
285
286}
287