1 /*
2  * Copyright (C) 2015 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.example.android.bluetoothadvertisements;
18 
19 import android.bluetooth.BluetoothAdapter;
20 import android.bluetooth.BluetoothManager;
21 import android.content.Context;
22 import android.content.Intent;
23 import android.os.Bundle;
24 import android.support.v4.app.FragmentActivity;
25 import android.support.v4.app.FragmentTransaction;
26 import android.widget.TextView;
27 import android.widget.Toast;
28 
29 /**
30  * Setup display fragments and ensure the device supports Bluetooth.
31  */
32 public class MainActivity extends FragmentActivity {
33 
34     private BluetoothAdapter mBluetoothAdapter;
35 
36     @Override
onCreate(Bundle savedInstanceState)37     protected void onCreate(Bundle savedInstanceState) {
38         super.onCreate(savedInstanceState);
39         setContentView(R.layout.activity_main);
40         setTitle(R.string.activity_main_title);
41 
42         if (savedInstanceState == null) {
43 
44             mBluetoothAdapter = ((BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE))
45                     .getAdapter();
46 
47             // Is Bluetooth supported on this device?
48             if (mBluetoothAdapter != null) {
49 
50                 // Is Bluetooth turned on?
51                 if (mBluetoothAdapter.isEnabled()) {
52 
53                     // Are Bluetooth Advertisements supported on this device?
54                     if (mBluetoothAdapter.isMultipleAdvertisementSupported()) {
55 
56                         // Everything is supported and enabled, load the fragments.
57                         setupFragments();
58 
59                     } else {
60 
61                         // Bluetooth Advertisements are not supported.
62                         showErrorText(R.string.bt_ads_not_supported);
63                     }
64                 } else {
65 
66                     // Prompt user to turn on Bluetooth (logic continues in onActivityResult()).
67                     Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
68                     startActivityForResult(enableBtIntent, Constants.REQUEST_ENABLE_BT);
69                 }
70             } else {
71 
72                 // Bluetooth is not supported.
73                 showErrorText(R.string.bt_not_supported);
74             }
75         }
76     }
77 
78     @Override
onActivityResult(int requestCode, int resultCode, Intent data)79     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
80         super.onActivityResult(requestCode, resultCode, data);
81         switch (requestCode) {
82             case Constants.REQUEST_ENABLE_BT:
83 
84                 if (resultCode == RESULT_OK) {
85 
86                     // Bluetooth is now Enabled, are Bluetooth Advertisements supported on
87                     // this device?
88                     if (mBluetoothAdapter.isMultipleAdvertisementSupported()) {
89 
90                         // Everything is supported and enabled, load the fragments.
91                         setupFragments();
92 
93                     } else {
94 
95                         // Bluetooth Advertisements are not supported.
96                         showErrorText(R.string.bt_ads_not_supported);
97                     }
98                 } else {
99 
100                     // User declined to enable Bluetooth, exit the app.
101                     Toast.makeText(this, R.string.bt_not_enabled_leaving,
102                             Toast.LENGTH_SHORT).show();
103                     finish();
104                 }
105 
106             default:
107                 super.onActivityResult(requestCode, resultCode, data);
108         }
109     }
110 
setupFragments()111     private void setupFragments() {
112         FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
113 
114         ScannerFragment scannerFragment = new ScannerFragment();
115         // Fragments can't access system services directly, so pass it the BluetoothAdapter
116         scannerFragment.setBluetoothAdapter(mBluetoothAdapter);
117         transaction.replace(R.id.scanner_fragment_container, scannerFragment);
118 
119         AdvertiserFragment advertiserFragment = new AdvertiserFragment();
120         transaction.replace(R.id.advertiser_fragment_container, advertiserFragment);
121 
122         transaction.commit();
123     }
124 
showErrorText(int messageId)125     private void showErrorText(int messageId) {
126 
127         TextView view = (TextView) findViewById(R.id.error_textview);
128         view.setText(getString(messageId));
129     }
130 }