BluetoothPairingDialog.java revision 67efa271bbff6f7ab355f8a0f121eca29a4dbec2 
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.BluetoothClass;
20import android.bluetooth.BluetoothDevice;
21import android.bluetooth.BluetoothIntent;
22import android.content.BroadcastReceiver;
23import android.content.Context;
24import android.content.DialogInterface;
25import android.content.Intent;
26import android.content.IntentFilter;
27import android.os.Bundle;
28import android.text.Editable;
29import android.text.InputFilter;
30import android.text.InputType;
31import android.text.TextWatcher;
32import android.text.InputFilter.LengthFilter;
33import android.util.Log;
34import android.view.View;
35import android.widget.Button;
36import android.widget.EditText;
37import android.widget.TextView;
38
39import com.android.internal.app.AlertActivity;
40import com.android.internal.app.AlertController;
41import com.android.settings.R;
42
43/**
44 * BluetoothPairingDialog asks the user to enter a PIN / Passkey / simple confirmation
45 * for pairing with a remote Bluetooth device. It is an activity that appears as a dialog.
46 */
47public class BluetoothPairingDialog extends AlertActivity implements DialogInterface.OnClickListener,
48        TextWatcher {
49    private static final String TAG = "BluetoothPairingDialog";
50
51    private final int BLUETOOTH_PIN_MAX_LENGTH = 16;
52    private final int BLUETOOTH_PASSKEY_MAX_LENGTH = 6;
53    private LocalBluetoothManager mLocalManager;
54    private BluetoothDevice mDevice;
55    private int mType;
56    private String mConfirmationPasskey;
57    private EditText mPairingView;
58    private Button mOkButton;
59
60    private static final String INSTANCE_KEY_PAIRING_CANCELED = "received_pairing_canceled";
61    private boolean mReceivedPairingCanceled;
62
63    private BroadcastReceiver mReceiver = new BroadcastReceiver() {
64        @Override
65        public void onReceive(Context context, Intent intent) {
66            if (!BluetoothIntent.PAIRING_CANCEL_ACTION.equals(intent.getAction())) {
67                return;
68            }
69
70            BluetoothDevice device = intent.getParcelableExtra(BluetoothIntent.DEVICE);
71            if (device == null || device.equals(mDevice)) {
72                onReceivedPairingCanceled();
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(BluetoothIntent.PAIRING_REQUEST_ACTION))
83        {
84            Log.e(TAG,
85                  "Error: this activity may be started only with intent " +
86                  BluetoothIntent.PAIRING_REQUEST_ACTION);
87            finish();
88        }
89
90        mLocalManager = LocalBluetoothManager.getInstance(this);
91        mDevice = intent.getParcelableExtra(BluetoothIntent.DEVICE);
92        mType = intent.getIntExtra(BluetoothIntent.PAIRING_VARIANT, BluetoothClass.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_CONFIRMATION){
98            int passkey =
99                intent.getIntExtra(BluetoothIntent.PASSKEY, BluetoothClass.ERROR);
100            if (passkey == BluetoothClass.ERROR) {
101                Log.e(TAG, "Invalid ConfirmationPasskey received, not showing any dialog");
102                return;
103            }
104            mConfirmationPasskey = String.format("%06d", passkey);
105            createConfirmationDialog();
106        } else {
107            Log.e(TAG, "Incorrect pairing type received, not showing any dialog");
108        }
109
110        /*
111         * Leave this registered through pause/resume since we still want to
112         * finish the activity in the background if pairing is canceled.
113         */
114        registerReceiver(mReceiver, new IntentFilter(BluetoothIntent.PAIRING_CANCEL_ACTION));
115    }
116
117    private void createUserEntryDialog() {
118        final AlertController.AlertParams p = mAlertParams;
119        p.mIconId = android.R.drawable.ic_dialog_info;
120        p.mTitle = getString(R.string.bluetooth_pin_entry);
121        p.mView = createView();
122        p.mPositiveButtonText = getString(android.R.string.ok);
123        p.mPositiveButtonListener = this;
124        p.mNegativeButtonText = getString(android.R.string.cancel);
125        p.mNegativeButtonListener = this;
126        setupAlert();
127
128        mOkButton = mAlert.getButton(DialogInterface.BUTTON_POSITIVE);
129        mOkButton.setEnabled(false);
130    }
131
132    private View createView() {
133        View view = getLayoutInflater().inflate(R.layout.bluetooth_pin_entry, null);
134
135        String name = mLocalManager.getCachedDeviceManager().getName(mDevice);
136        TextView messageView = (TextView) view.findViewById(R.id.message);
137        mPairingView = (EditText) view.findViewById(R.id.text);
138        mPairingView.addTextChangedListener(this);
139
140        if (mType == BluetoothDevice.PAIRING_VARIANT_PIN) {
141            messageView.setText(getString(R.string.bluetooth_enter_pin_msg, name));
142            // Maximum of 16 characters in a PIN adb sync
143            mPairingView.setFilters(new InputFilter[] {
144                    new LengthFilter(BLUETOOTH_PIN_MAX_LENGTH) });
145        } else if (mType == BluetoothDevice.PAIRING_VARIANT_PASSKEY){
146            messageView.setText(getString(R.string.bluetooth_enter_passkey_msg, name));
147            // Maximum of 6 digits for passkey
148            mPairingView.setInputType(InputType.TYPE_NUMBER_FLAG_SIGNED);
149            mPairingView.setFilters(new InputFilter[] {
150                    new LengthFilter(BLUETOOTH_PASSKEY_MAX_LENGTH)});
151        } else {
152            mPairingView.setVisibility(View.GONE);
153            messageView.setText(getString(R.string.bluetooth_confirm_passkey_msg, name,
154                    mConfirmationPasskey));
155        }
156        return view;
157    }
158
159    private void createConfirmationDialog() {
160        final AlertController.AlertParams p = mAlertParams;
161        p.mIconId = android.R.drawable.ic_dialog_info;
162        p.mTitle = getString(R.string.bluetooth_pin_entry);
163        p.mView = createView();
164        p.mPositiveButtonText = getString(R.string.bluetooth_pairing_accept);
165        p.mPositiveButtonListener = this;
166        p.mNegativeButtonText = getString(R.string.bluetooth_pairing_decline);
167        p.mNegativeButtonListener = this;
168        setupAlert();
169    }
170
171    @Override
172    protected void onRestoreInstanceState(Bundle savedInstanceState) {
173        super.onRestoreInstanceState(savedInstanceState);
174
175        mReceivedPairingCanceled = savedInstanceState.getBoolean(INSTANCE_KEY_PAIRING_CANCELED);
176        if (mReceivedPairingCanceled) {
177            onReceivedPairingCanceled();
178        }
179    }
180
181    @Override
182    protected void onSaveInstanceState(Bundle outState) {
183        super.onSaveInstanceState(outState);
184
185        outState.putBoolean(INSTANCE_KEY_PAIRING_CANCELED, mReceivedPairingCanceled);
186    }
187
188    @Override
189    protected void onDestroy() {
190        super.onDestroy();
191
192        unregisterReceiver(mReceiver);
193    }
194
195    public void afterTextChanged(Editable s) {
196        if (s.length() > 0) {
197            mOkButton.setEnabled(true);
198        }
199    }
200
201    private void onReceivedPairingCanceled() {
202        mReceivedPairingCanceled = true;
203
204        TextView messageView = (TextView) findViewById(R.id.message);
205        messageView.setText(getString(R.string.bluetooth_pairing_error_message,
206                mDevice.getName()));
207
208        mPairingView.setVisibility(View.GONE);
209        mPairingView.clearFocus();
210        mPairingView.removeTextChangedListener(this);
211
212        mOkButton = mAlert.getButton(DialogInterface.BUTTON_POSITIVE);
213        mOkButton.setEnabled(true);
214        mOkButton.setText(android.R.string.ok);
215        mAlert.getButton(DialogInterface.BUTTON_NEGATIVE).setVisibility(View.GONE);
216    }
217
218    private void onPair(String value) {
219        if (mType == BluetoothDevice.PAIRING_VARIANT_PIN) {
220            byte[] pinBytes = BluetoothDevice.convertPinToBytes(value);
221            if (pinBytes == null) {
222                return;
223            }
224            mDevice.setPin(pinBytes);
225        } else if (mType == BluetoothDevice.PAIRING_VARIANT_PASSKEY) {
226            int passkey = Integer.parseInt(value);
227            mDevice.setPasskey(passkey);
228        } else {
229            mDevice.setPairingConfirmation(true);
230        }
231    }
232
233    private void onCancel() {
234        mDevice.cancelPairingUserInput();
235    }
236
237    public void onClick(DialogInterface dialog, int which) {
238        switch (which) {
239            case DialogInterface.BUTTON_POSITIVE:
240                onPair(mPairingView.getText().toString());
241                break;
242
243            case DialogInterface.BUTTON_NEGATIVE:
244                onCancel();
245                break;
246        }
247    }
248
249    /* Not used */
250    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
251    }
252
253    /* Not used */
254    public void onTextChanged(CharSequence s, int start, int before, int count) {
255    }
256
257}
258