1 /*
2  * Copyright (C) 2017 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.google.android.car.obd2app;
18 
19 import android.app.Activity;
20 import android.content.Intent;
21 import android.content.SharedPreferences;
22 import android.content.pm.ActivityInfo;
23 import android.os.Bundle;
24 import android.preference.PreferenceManager;
25 import android.text.TextUtils;
26 import android.util.Log;
27 import android.view.View;
28 import android.view.View.OnClickListener;
29 import android.widget.Button;
30 import android.widget.TextView;
31 import java.util.Timer;
32 
33 public class MainActivity extends Activity implements StatusNotification {
34     public static final String TAG = MainActivity.class.getSimpleName();
35 
36     private static final String BLUETOOTH_MAC_PREFERENCE_ID = "bluetooth_mac";
37     private static final String SCAN_DELAY_PREFERENCE_ID = "scan_delay";
38 
39     private Obd2CollectionTask mCollectionTask = null;
40     private final Timer mTimer = new Timer("com.google.android.car.obd2app.collection");
41 
getBluetoothDongleMacFromPreferences(String defaultValue)42     private String getBluetoothDongleMacFromPreferences(String defaultValue) {
43         SharedPreferences appPreferences = PreferenceManager.getDefaultSharedPreferences(this);
44         return appPreferences.getString(BLUETOOTH_MAC_PREFERENCE_ID, defaultValue);
45     }
46 
getScanDelayFromPreferences(int defaultValue)47     private int getScanDelayFromPreferences(int defaultValue) {
48         SharedPreferences appPreferences = PreferenceManager.getDefaultSharedPreferences(this);
49         return appPreferences.getInt(SCAN_DELAY_PREFERENCE_ID, defaultValue);
50     }
51 
52     @Override
onCreate(Bundle savedInstanceState)53     protected void onCreate(Bundle savedInstanceState) {
54         super.onCreate(savedInstanceState);
55         setContentView(R.layout.activity_main);
56         setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR);
57         String bluetoothDongleMac = getBluetoothDongleMacFromPreferences("");
58         if (TextUtils.isEmpty(bluetoothDongleMac)) {
59             notifyNoDongle();
60         } else {
61             notifyPaired(bluetoothDongleMac);
62         }
63         findViewById(R.id.connection)
64                 .setOnClickListener(
65                         new OnClickListener() {
66                             @Override
67                             public void onClick(View v) {
68                                 handleConnection(v);
69                             }
70                         });
71         Log.i(TAG, "I did all the things");
72     }
73 
stopConnection()74     private void stopConnection() {
75         mCollectionTask.cancel();
76         mTimer.purge();
77         mCollectionTask = null;
78     }
79 
80     @Override
onDestroy()81     protected void onDestroy() {
82         stopConnection();
83     }
84 
doSettings(View view)85     public void doSettings(View view) {
86         Intent launchSettings = new Intent(this, SettingsActivity.class);
87         startActivity(launchSettings);
88     }
89 
90     @Override
notify(String status)91     public void notify(String status) {
92         Log.i(TAG, status);
93         runOnUiThread(() -> ((TextView) findViewById(R.id.statusBar)).setText(status));
94     }
95 
handleConnection(View view)96     public void handleConnection(View view) {
97         String deviceAddress = getBluetoothDongleMacFromPreferences("");
98         Log.i(TAG, "Considering a connection to " + deviceAddress);
99         if (TextUtils.isEmpty(deviceAddress)) {
100             notifyNoDongle();
101         }
102         if (mCollectionTask == null) {
103             mCollectionTask = Obd2CollectionTask.create(this, this, deviceAddress);
104             if (null == mCollectionTask) {
105                 notifyConnectionFailed();
106                 return;
107             }
108             final int delay = 1000 * getScanDelayFromPreferences(2);
109             mTimer.scheduleAtFixedRate(mCollectionTask, delay, delay);
110             ((Button) view).setText("Disconnect");
111         } else {
112             stopConnection();
113             ((Button) view).setText("Connect");
114         }
115     }
116 }
117