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      1 /*
      2  * Copyright (C) 2009 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 
     17 package com.android.settings.bluetooth;
     18 
     19 import com.android.internal.app.AlertActivity;
     20 import com.android.internal.app.AlertController;
     21 import com.android.settings.R;
     22 
     23 import android.app.Activity;
     24 import android.bluetooth.BluetoothAdapter;
     25 import android.content.DialogInterface;
     26 import android.content.Intent;
     27 import android.os.Bundle;
     28 import android.util.Log;
     29 import android.view.View;
     30 import android.widget.TextView;
     31 
     32 /**
     33  * RequestPermissionHelperActivity asks the user whether to enable discovery.
     34  * This is usually started by RequestPermissionActivity.
     35  */
     36 public class RequestPermissionHelperActivity extends AlertActivity implements
     37         DialogInterface.OnClickListener {
     38     private static final String TAG = "RequestPermissionHelperActivity";
     39 
     40     public static final String ACTION_INTERNAL_REQUEST_BT_ON =
     41         "com.android.settings.bluetooth.ACTION_INTERNAL_REQUEST_BT_ON";
     42 
     43     public static final String ACTION_INTERNAL_REQUEST_BT_ON_AND_DISCOVERABLE =
     44         "com.android.settings.bluetooth.ACTION_INTERNAL_REQUEST_BT_ON_AND_DISCOVERABLE";
     45 
     46     private LocalBluetoothManager mLocalManager;
     47 
     48     private int mTimeout;
     49 
     50     // True if requesting BT to be turned on
     51     // False if requesting BT to be turned on + discoverable mode
     52     private boolean mEnableOnly;
     53 
     54     @Override
     55     protected void onCreate(Bundle savedInstanceState) {
     56         super.onCreate(savedInstanceState);
     57 
     58         if (parseIntent()) {
     59             finish();
     60             return;
     61         }
     62 
     63         createDialog();
     64     }
     65 
     66     void createDialog() {
     67         final AlertController.AlertParams p = mAlertParams;
     68         p.mIconId = android.R.drawable.ic_dialog_info;
     69         p.mTitle = getString(R.string.bluetooth_permission_request);
     70 
     71         View view = getLayoutInflater().inflate(R.layout.bluetooth_discoverable, null);
     72         p.mView = view;
     73         TextView tv = (TextView) view.findViewById(R.id.message);
     74 
     75         if (mEnableOnly) {
     76             tv.setText(getString(R.string.bluetooth_ask_enablement));
     77         } else {
     78             tv.setText(getString(R.string.bluetooth_ask_enablement_and_discovery, mTimeout));
     79         }
     80 
     81         p.mPositiveButtonText = getString(R.string.yes);
     82         p.mPositiveButtonListener = this;
     83         p.mNegativeButtonText = getString(R.string.no);
     84         p.mNegativeButtonListener = this;
     85 
     86         setupAlert();
     87     }
     88 
     89     public void onClick(DialogInterface dialog, int which) {
     90         int returnCode;
     91         switch (which) {
     92             case DialogInterface.BUTTON_POSITIVE:
     93                 int btState = 0;
     94 
     95                 try {
     96                     // TODO There's a better way.
     97                     int retryCount = 30;
     98                     do {
     99                         btState = mLocalManager.getBluetoothState();
    100                         Thread.sleep(100);
    101                     } while (btState == BluetoothAdapter.STATE_TURNING_OFF && --retryCount > 0);
    102                 } catch (InterruptedException e) {
    103                     // don't care
    104                 }
    105 
    106                 if (btState == BluetoothAdapter.STATE_TURNING_ON
    107                         || btState == BluetoothAdapter.STATE_ON
    108                         || mLocalManager.getBluetoothAdapter().enable()) {
    109                     returnCode = RequestPermissionActivity.RESULT_BT_STARTING_OR_STARTED;
    110                 } else {
    111                     returnCode = Activity.RESULT_CANCELED;
    112                 }
    113                 break;
    114 
    115             case DialogInterface.BUTTON_NEGATIVE:
    116                 returnCode = Activity.RESULT_CANCELED;
    117                 break;
    118             default:
    119                 return;
    120         }
    121         setResult(returnCode);
    122     }
    123 
    124     private boolean parseIntent() {
    125         Intent intent = getIntent();
    126         if (intent != null && intent.getAction().equals(ACTION_INTERNAL_REQUEST_BT_ON)) {
    127             mEnableOnly = true;
    128         } else if (intent != null
    129                 && intent.getAction().equals(ACTION_INTERNAL_REQUEST_BT_ON_AND_DISCOVERABLE)) {
    130             mEnableOnly = false;
    131             // Value used for display purposes. Not range checking.
    132             mTimeout = intent.getIntExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,
    133                     BluetoothDiscoverableEnabler.DEFAULT_DISCOVERABLE_TIMEOUT);
    134         } else {
    135             setResult(Activity.RESULT_CANCELED);
    136             return true;
    137         }
    138 
    139         mLocalManager = LocalBluetoothManager.getInstance(this);
    140         if (mLocalManager == null) {
    141             Log.e(TAG, "Error: there's a problem starting bluetooth");
    142             setResult(Activity.RESULT_CANCELED);
    143             return true;
    144         }
    145 
    146         return false;
    147     }
    148 
    149     @Override
    150     public void onBackPressed() {
    151         setResult(Activity.RESULT_CANCELED);
    152         super.onBackPressed();
    153     }
    154 }
    155