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      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
     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
     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 
    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 
    125     private void showErrorText(int messageId) {
    126 
    127         TextView view = (TextView) findViewById(R.id.error_textview);
    128         view.setText(getString(messageId));
    129     }
    130 }