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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_CONNECT = 1;
     75 
     76     private static final int DIALOG_YES_NO_AUTH = 2;
     77 
     78     private static final String KEY_USER_TIMEOUT = "user_timeout";
     79 
     80     private View mView;
     81 
     82     private EditText mKeyView;
     83 
     84     private TextView messageView;
     85 
     86     private String mSessionKey = "";
     87 
     88     private int mCurrentDialog;
     89 
     90     private Button mOkButton;
     91 
     92     private CheckBox mAlwaysAllowed;
     93 
     94     private boolean mTimeout = false;
     95 
     96     private boolean mAlwaysAllowedValue = true;
     97 
     98     private static final int DISMISS_TIMEOUT_DIALOG = 0;
     99 
    100     private static final int DISMISS_TIMEOUT_DIALOG_VALUE = 2000;
    101 
    102     private BroadcastReceiver mReceiver = new BroadcastReceiver() {
    103         @Override
    104         public void onReceive(Context context, Intent intent) {
    105             if (!BluetoothPbapService.USER_CONFIRM_TIMEOUT_ACTION.equals(intent.getAction())) {
    106                 return;
    107             }
    108             onTimeout();
    109         }
    110     };
    111 
    112     @Override
    113     protected void onCreate(Bundle savedInstanceState) {
    114         super.onCreate(savedInstanceState);
    115         Intent i = getIntent();
    116         String action = i.getAction();
    117         if (action.equals(BluetoothPbapService.ACCESS_REQUEST_ACTION)) {
    118             showPbapDialog(DIALOG_YES_NO_CONNECT);
    119             mCurrentDialog = DIALOG_YES_NO_CONNECT;
    120         } else if (action.equals(BluetoothPbapService.AUTH_CHALL_ACTION)) {
    121             showPbapDialog(DIALOG_YES_NO_AUTH);
    122             mCurrentDialog = DIALOG_YES_NO_AUTH;
    123         } else {
    124             Log.e(TAG, "Error: this activity may be started only with intent "
    125                     + "PBAP_ACCESS_REQUEST or PBAP_AUTH_CHALL ");
    126             finish();
    127         }
    128         registerReceiver(mReceiver, new IntentFilter(
    129                 BluetoothPbapService.USER_CONFIRM_TIMEOUT_ACTION));
    130     }
    131 
    132     private void showPbapDialog(int id) {
    133         final AlertController.AlertParams p = mAlertParams;
    134         switch (id) {
    135             case DIALOG_YES_NO_CONNECT:
    136                 p.mIconId = android.R.drawable.ic_dialog_info;
    137                 p.mTitle = getString(R.string.pbap_acceptance_dialog_header);
    138                 p.mView = createView(DIALOG_YES_NO_CONNECT);
    139                 p.mPositiveButtonText = getString(android.R.string.yes);
    140                 p.mPositiveButtonListener = this;
    141                 p.mNegativeButtonText = getString(android.R.string.no);
    142                 p.mNegativeButtonListener = this;
    143                 mOkButton = mAlert.getButton(DialogInterface.BUTTON_POSITIVE);
    144                 setupAlert();
    145                 break;
    146             case DIALOG_YES_NO_AUTH:
    147                 p.mIconId = android.R.drawable.ic_dialog_info;
    148                 p.mTitle = getString(R.string.pbap_session_key_dialog_header);
    149                 p.mView = createView(DIALOG_YES_NO_AUTH);
    150                 p.mPositiveButtonText = getString(android.R.string.ok);
    151                 p.mPositiveButtonListener = this;
    152                 p.mNegativeButtonText = getString(android.R.string.cancel);
    153                 p.mNegativeButtonListener = this;
    154                 setupAlert();
    155                 mOkButton = mAlert.getButton(DialogInterface.BUTTON_POSITIVE);
    156                 mOkButton.setEnabled(false);
    157                 break;
    158             default:
    159                 break;
    160         }
    161     }
    162 
    163     private String createDisplayText(final int id) {
    164         String mRemoteName = BluetoothPbapService.getRemoteDeviceName();
    165         switch (id) {
    166             case DIALOG_YES_NO_CONNECT:
    167                 String mMessage1 = getString(R.string.pbap_acceptance_dialog_title, mRemoteName,
    168                         mRemoteName);
    169                 return mMessage1;
    170             case DIALOG_YES_NO_AUTH:
    171                 String mMessage2 = getString(R.string.pbap_session_key_dialog_title, mRemoteName);
    172                 return mMessage2;
    173             default:
    174                 return null;
    175         }
    176     }
    177 
    178     private View createView(final int id) {
    179         switch (id) {
    180             case DIALOG_YES_NO_CONNECT:
    181                 mView = getLayoutInflater().inflate(R.layout.access, null);
    182                 messageView = (TextView)mView.findViewById(R.id.message);
    183                 messageView.setText(createDisplayText(id));
    184                 mAlwaysAllowed = (CheckBox)mView.findViewById(R.id.alwaysallowed);
    185                 mAlwaysAllowed.setChecked(true);
    186                 mAlwaysAllowed.setOnCheckedChangeListener(new OnCheckedChangeListener() {
    187                     public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    188                         if (isChecked) {
    189                             mAlwaysAllowedValue = true;
    190                         } else {
    191                             mAlwaysAllowedValue = false;
    192                         }
    193                     }
    194                 });
    195                 return mView;
    196             case DIALOG_YES_NO_AUTH:
    197                 mView = getLayoutInflater().inflate(R.layout.auth, null);
    198                 messageView = (TextView)mView.findViewById(R.id.message);
    199                 messageView.setText(createDisplayText(id));
    200                 mKeyView = (EditText)mView.findViewById(R.id.text);
    201                 mKeyView.addTextChangedListener(this);
    202                 mKeyView.setFilters(new InputFilter[] {
    203                     new LengthFilter(BLUETOOTH_OBEX_AUTHKEY_MAX_LENGTH)
    204                 });
    205                 return mView;
    206             default:
    207                 return null;
    208         }
    209     }
    210 
    211     private void onPositive() {
    212         if (!mTimeout) {
    213             if (mCurrentDialog == DIALOG_YES_NO_CONNECT) {
    214                 sendIntentToReceiver(BluetoothPbapService.ACCESS_ALLOWED_ACTION,
    215                         BluetoothPbapService.EXTRA_ALWAYS_ALLOWED, mAlwaysAllowedValue);
    216             } else if (mCurrentDialog == DIALOG_YES_NO_AUTH) {
    217                 sendIntentToReceiver(BluetoothPbapService.AUTH_RESPONSE_ACTION,
    218                         BluetoothPbapService.EXTRA_SESSION_KEY, mSessionKey);
    219                 mKeyView.removeTextChangedListener(this);
    220             }
    221         }
    222         mTimeout = false;
    223         finish();
    224     }
    225 
    226     private void onNegative() {
    227         if (mCurrentDialog == DIALOG_YES_NO_CONNECT) {
    228             sendIntentToReceiver(BluetoothPbapService.ACCESS_DISALLOWED_ACTION, null, null);
    229         } else if (mCurrentDialog == DIALOG_YES_NO_AUTH) {
    230             sendIntentToReceiver(BluetoothPbapService.AUTH_CANCELLED_ACTION, null, null);
    231             mKeyView.removeTextChangedListener(this);
    232         }
    233         finish();
    234     }
    235 
    236     private void sendIntentToReceiver(final String intentName, final String extraName,
    237             final String extraValue) {
    238         Intent intent = new Intent(intentName);
    239         intent.setClassName(BluetoothPbapService.THIS_PACKAGE_NAME, BluetoothPbapReceiver.class
    240                 .getName());
    241         if (extraName != null) {
    242             intent.putExtra(extraName, extraValue);
    243         }
    244         sendBroadcast(intent);
    245     }
    246 
    247     private void sendIntentToReceiver(final String intentName, final String extraName,
    248             final boolean extraValue) {
    249         Intent intent = new Intent(intentName);
    250         intent.setClassName(BluetoothPbapService.THIS_PACKAGE_NAME, BluetoothPbapReceiver.class
    251                 .getName());
    252         if (extraName != null) {
    253             intent.putExtra(extraName, extraValue);
    254         }
    255         sendBroadcast(intent);
    256     }
    257 
    258     public void onClick(DialogInterface dialog, int which) {
    259         switch (which) {
    260             case DialogInterface.BUTTON_POSITIVE:
    261                 if (mCurrentDialog == DIALOG_YES_NO_AUTH) {
    262                     mSessionKey = mKeyView.getText().toString();
    263                 }
    264                 onPositive();
    265                 break;
    266 
    267             case DialogInterface.BUTTON_NEGATIVE:
    268                 onNegative();
    269                 break;
    270             default:
    271                 break;
    272         }
    273     }
    274 
    275     private void onTimeout() {
    276         mTimeout = true;
    277         if (mCurrentDialog == DIALOG_YES_NO_CONNECT) {
    278             messageView.setText(getString(R.string.pbap_acceptance_timeout_message,
    279                     BluetoothPbapService.getRemoteDeviceName()));
    280             mAlert.getButton(DialogInterface.BUTTON_NEGATIVE).setVisibility(View.GONE);
    281             mAlwaysAllowed.setVisibility(View.GONE);
    282             mAlwaysAllowed.clearFocus();
    283         } else if (mCurrentDialog == DIALOG_YES_NO_AUTH) {
    284             messageView.setText(getString(R.string.pbap_authentication_timeout_message,
    285                     BluetoothPbapService.getRemoteDeviceName()));
    286             mKeyView.setVisibility(View.GONE);
    287             mKeyView.clearFocus();
    288             mKeyView.removeTextChangedListener(this);
    289             mOkButton.setEnabled(true);
    290             mAlert.getButton(DialogInterface.BUTTON_NEGATIVE).setVisibility(View.GONE);
    291         }
    292 
    293         mTimeoutHandler.sendMessageDelayed(mTimeoutHandler.obtainMessage(DISMISS_TIMEOUT_DIALOG),
    294                 DISMISS_TIMEOUT_DIALOG_VALUE);
    295     }
    296 
    297     @Override
    298     protected void onRestoreInstanceState(Bundle savedInstanceState) {
    299         super.onRestoreInstanceState(savedInstanceState);
    300         mTimeout = savedInstanceState.getBoolean(KEY_USER_TIMEOUT);
    301         if (V) Log.v(TAG, "onRestoreInstanceState() mTimeout: " + mTimeout);
    302         if (mTimeout) {
    303             onTimeout();
    304         }
    305     }
    306 
    307     @Override
    308     protected void onSaveInstanceState(Bundle outState) {
    309         super.onSaveInstanceState(outState);
    310         outState.putBoolean(KEY_USER_TIMEOUT, mTimeout);
    311     }
    312 
    313     @Override
    314     protected void onDestroy() {
    315         super.onDestroy();
    316         unregisterReceiver(mReceiver);
    317     }
    318 
    319     public boolean onPreferenceChange(Preference preference, Object newValue) {
    320         return true;
    321     }
    322 
    323     public void beforeTextChanged(CharSequence s, int start, int before, int after) {
    324     }
    325 
    326     public void onTextChanged(CharSequence s, int start, int before, int count) {
    327     }
    328 
    329     public void afterTextChanged(android.text.Editable s) {
    330         if (s.length() > 0) {
    331             mOkButton.setEnabled(true);
    332         }
    333     }
    334 
    335     private final Handler mTimeoutHandler = new Handler() {
    336         @Override
    337         public void handleMessage(Message msg) {
    338             switch (msg.what) {
    339                 case DISMISS_TIMEOUT_DIALOG:
    340                     if (V) Log.v(TAG, "Received DISMISS_TIMEOUT_DIALOG msg.");
    341                     finish();
    342                     break;
    343                 default:
    344                     break;
    345             }
    346         }
    347     };
    348 }
    349