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      1 /*
      2  * Copyright (c) 2008-2009, Motorola, Inc.
      3  *
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions are met:
      8  *
      9  * - Redistributions of source code must retain the above copyright notice,
     10  * this list of conditions and the following disclaimer.
     11  *
     12  * - Redistributions in binary form must reproduce the above copyright notice,
     13  * this list of conditions and the following disclaimer in the documentation
     14  * and/or other materials provided with the distribution.
     15  *
     16  * - Neither the name of the Motorola, Inc. nor the names of its contributors
     17  * may be used to endorse or promote products derived from this software
     18  * without specific prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
     21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
     24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     30  * POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 package com.android.bluetooth.pbap;
     34 
     35 import com.android.bluetooth.R;
     36 
     37 import android.content.BroadcastReceiver;
     38 import android.content.Context;
     39 import android.content.DialogInterface;
     40 import android.content.Intent;
     41 import android.content.IntentFilter;
     42 import android.os.Bundle;
     43 import android.os.Handler;
     44 import android.os.Message;
     45 import android.preference.Preference;
     46 import android.util.Log;
     47 import android.view.View;
     48 import android.widget.CheckBox;
     49 import android.widget.CompoundButton;
     50 import android.widget.EditText;
     51 import android.widget.TextView;
     52 import android.widget.Button;
     53 import android.widget.CompoundButton.OnCheckedChangeListener;
     54 import android.text.InputFilter;
     55 import android.text.TextWatcher;
     56 import android.text.InputFilter.LengthFilter;
     57 
     58 import com.android.internal.app.AlertActivity;
     59 import com.android.internal.app.AlertController;
     60 
     61 /**
     62  * PbapActivity shows two dialogues: One for accepting incoming pbap request and
     63  * the other prompts the user to enter a session key for authentication with a
     64  * remote Bluetooth device.
     65  */
     66 public class BluetoothPbapActivity extends AlertActivity implements
     67         DialogInterface.OnClickListener, Preference.OnPreferenceChangeListener, TextWatcher {
     68     private static final String TAG = "BluetoothPbapActivity";
     69 
     70     private static final boolean V = BluetoothPbapService.VERBOSE;
     71 
     72     private static final int BLUETOOTH_OBEX_AUTHKEY_MAX_LENGTH = 16;
     73 
     74     private static final int DIALOG_YES_NO_AUTH = 1;
     75 
     76     private static final String KEY_USER_TIMEOUT = "user_timeout";
     77 
     78     private View mView;
     79 
     80     private EditText mKeyView;
     81 
     82     private TextView messageView;
     83 
     84     private String mSessionKey = "";
     85 
     86     private int mCurrentDialog;
     87 
     88     private Button mOkButton;
     89 
     90     private CheckBox mAlwaysAllowed;
     91 
     92     private boolean mTimeout = false;
     93 
     94     private boolean mAlwaysAllowedValue = true;
     95 
     96     private static final int DISMISS_TIMEOUT_DIALOG = 0;
     97 
     98     private static final int DISMISS_TIMEOUT_DIALOG_VALUE = 2000;
     99 
    100     private BroadcastReceiver mReceiver = new BroadcastReceiver() {
    101         @Override
    102         public void onReceive(Context context, Intent intent) {
    103             if (!BluetoothPbapService.USER_CONFIRM_TIMEOUT_ACTION.equals(intent.getAction())) {
    104                 return;
    105             }
    106             onTimeout();
    107         }
    108     };
    109 
    110     @Override
    111     protected void onCreate(Bundle savedInstanceState) {
    112         super.onCreate(savedInstanceState);
    113         Intent i = getIntent();
    114         String action = i.getAction();
    115         if (action.equals(BluetoothPbapService.AUTH_CHALL_ACTION)) {
    116             showPbapDialog(DIALOG_YES_NO_AUTH);
    117             mCurrentDialog = DIALOG_YES_NO_AUTH;
    118         } else {
    119             Log.e(TAG, "Error: this activity may be started only with intent "
    120                     + "PBAP_ACCESS_REQUEST or PBAP_AUTH_CHALL ");
    121             finish();
    122         }
    123         registerReceiver(mReceiver, new IntentFilter(
    124                 BluetoothPbapService.USER_CONFIRM_TIMEOUT_ACTION));
    125     }
    126 
    127     private void showPbapDialog(int id) {
    128         final AlertController.AlertParams p = mAlertParams;
    129         switch (id) {
    130             case DIALOG_YES_NO_AUTH:
    131                 p.mTitle = getString(R.string.pbap_session_key_dialog_header);
    132                 p.mView = createView(DIALOG_YES_NO_AUTH);
    133                 p.mPositiveButtonText = getString(android.R.string.ok);
    134                 p.mPositiveButtonListener = this;
    135                 p.mNegativeButtonText = getString(android.R.string.cancel);
    136                 p.mNegativeButtonListener = this;
    137                 setupAlert();
    138                 mOkButton = mAlert.getButton(DialogInterface.BUTTON_POSITIVE);
    139                 mOkButton.setEnabled(false);
    140                 break;
    141             default:
    142                 break;
    143         }
    144     }
    145 
    146     private String createDisplayText(final int id) {
    147         String mRemoteName = BluetoothPbapService.getRemoteDeviceName();
    148         switch (id) {
    149             case DIALOG_YES_NO_AUTH:
    150                 String mMessage2 = getString(R.string.pbap_session_key_dialog_title, mRemoteName);
    151                 return mMessage2;
    152             default:
    153                 return null;
    154         }
    155     }
    156 
    157     private View createView(final int id) {
    158         switch (id) {
    159             case DIALOG_YES_NO_AUTH:
    160                 mView = getLayoutInflater().inflate(R.layout.auth, null);
    161                 messageView = (TextView)mView.findViewById(R.id.message);
    162                 messageView.setText(createDisplayText(id));
    163                 mKeyView = (EditText)mView.findViewById(R.id.text);
    164                 mKeyView.addTextChangedListener(this);
    165                 mKeyView.setFilters(new InputFilter[] {
    166                     new LengthFilter(BLUETOOTH_OBEX_AUTHKEY_MAX_LENGTH)
    167                 });
    168                 return mView;
    169             default:
    170                 return null;
    171         }
    172     }
    173 
    174     private void onPositive() {
    175         if (!mTimeout) {
    176             if (mCurrentDialog == DIALOG_YES_NO_AUTH) {
    177                 sendIntentToReceiver(BluetoothPbapService.AUTH_RESPONSE_ACTION,
    178                         BluetoothPbapService.EXTRA_SESSION_KEY, mSessionKey);
    179                 mKeyView.removeTextChangedListener(this);
    180             }
    181         }
    182         mTimeout = false;
    183         finish();
    184     }
    185 
    186     private void onNegative() {
    187         if (mCurrentDialog == DIALOG_YES_NO_AUTH) {
    188             sendIntentToReceiver(BluetoothPbapService.AUTH_CANCELLED_ACTION, null, null);
    189             mKeyView.removeTextChangedListener(this);
    190         }
    191         finish();
    192     }
    193 
    194     private void sendIntentToReceiver(final String intentName, final String extraName,
    195             final String extraValue) {
    196         Intent intent = new Intent(intentName);
    197         intent.setClassName(BluetoothPbapService.THIS_PACKAGE_NAME, BluetoothPbapReceiver.class
    198                 .getName());
    199         if (extraName != null) {
    200             intent.putExtra(extraName, extraValue);
    201         }
    202         sendBroadcast(intent);
    203     }
    204 
    205     private void sendIntentToReceiver(final String intentName, final String extraName,
    206             final boolean extraValue) {
    207         Intent intent = new Intent(intentName);
    208         intent.setClassName(BluetoothPbapService.THIS_PACKAGE_NAME, BluetoothPbapReceiver.class
    209                 .getName());
    210         if (extraName != null) {
    211             intent.putExtra(extraName, extraValue);
    212         }
    213         sendBroadcast(intent);
    214     }
    215 
    216     public void onClick(DialogInterface dialog, int which) {
    217         switch (which) {
    218             case DialogInterface.BUTTON_POSITIVE:
    219                 if (mCurrentDialog == DIALOG_YES_NO_AUTH) {
    220                     mSessionKey = mKeyView.getText().toString();
    221                 }
    222                 onPositive();
    223                 break;
    224 
    225             case DialogInterface.BUTTON_NEGATIVE:
    226                 onNegative();
    227                 break;
    228             default:
    229                 break;
    230         }
    231     }
    232 
    233     private void onTimeout() {
    234         mTimeout = true;
    235         if (mCurrentDialog == DIALOG_YES_NO_AUTH) {
    236             messageView.setText(getString(R.string.pbap_authentication_timeout_message,
    237                     BluetoothPbapService.getRemoteDeviceName()));
    238             mKeyView.setVisibility(View.GONE);
    239             mKeyView.clearFocus();
    240             mKeyView.removeTextChangedListener(this);
    241             mOkButton.setEnabled(true);
    242             mAlert.getButton(DialogInterface.BUTTON_NEGATIVE).setVisibility(View.GONE);
    243         }
    244 
    245         mTimeoutHandler.sendMessageDelayed(mTimeoutHandler.obtainMessage(DISMISS_TIMEOUT_DIALOG),
    246                 DISMISS_TIMEOUT_DIALOG_VALUE);
    247     }
    248 
    249     @Override
    250     protected void onRestoreInstanceState(Bundle savedInstanceState) {
    251         super.onRestoreInstanceState(savedInstanceState);
    252         mTimeout = savedInstanceState.getBoolean(KEY_USER_TIMEOUT);
    253         if (V) Log.v(TAG, "onRestoreInstanceState() mTimeout: " + mTimeout);
    254         if (mTimeout) {
    255             onTimeout();
    256         }
    257     }
    258 
    259     @Override
    260     protected void onSaveInstanceState(Bundle outState) {
    261         super.onSaveInstanceState(outState);
    262         outState.putBoolean(KEY_USER_TIMEOUT, mTimeout);
    263     }
    264 
    265     @Override
    266     protected void onDestroy() {
    267         super.onDestroy();
    268         unregisterReceiver(mReceiver);
    269     }
    270 
    271     public boolean onPreferenceChange(Preference preference, Object newValue) {
    272         return true;
    273     }
    274 
    275     public void beforeTextChanged(CharSequence s, int start, int before, int after) {
    276     }
    277 
    278     public void onTextChanged(CharSequence s, int start, int before, int count) {
    279     }
    280 
    281     public void afterTextChanged(android.text.Editable s) {
    282         if (s.length() > 0) {
    283             mOkButton.setEnabled(true);
    284         }
    285     }
    286 
    287     private final Handler mTimeoutHandler = new Handler() {
    288         @Override
    289         public void handleMessage(Message msg) {
    290             switch (msg.what) {
    291                 case DISMISS_TIMEOUT_DIALOG:
    292                     if (V) Log.v(TAG, "Received DISMISS_TIMEOUT_DIALOG msg.");
    293                     finish();
    294                     break;
    295                 default:
    296                     break;
    297             }
    298         }
    299     };
    300 }
    301