1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/*
* SPDX-License-Identifier: GPL-3.0-only
* Copyright (c) 2019 Bjørn Mork <bjorn@mork.no>
*/
package no.mork.android.defogger;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.le.BluetoothLeScanner;
import android.bluetooth.le.ScanCallback;
import android.bluetooth.le.ScanFilter;
import android.bluetooth.le.ScanResult;
import android.bluetooth.le.ScanSettings;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.ParcelUuid;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
public class ScannerActivity extends Activity implements Runnable {
private static String msg = "Defogger Scanning: ";
// Stops scanning after 10 seconds.
private static final long SCAN_PERIOD = 10000;
private BluetoothLeScanner btScanner;
private boolean mScanning;
private ScanCallback leScanCallback;
private ScanAdapter scanlistAdapter;
private class BtleScanCallback extends ScanCallback {
@Override
public void onScanResult(int callbackType, ScanResult result) {
super.onScanResult(callbackType, result);
addScanResult(result);
}
@Override
public void onBatchScanResults(List<ScanResult> results) {
Log.d(msg, "onBatchScanResults()");
for (ScanResult result : results) {
addScanResult(result);
}
}
@Override
public void onScanFailed(int errorCode) {
Log.e(msg, "Failed with code " + errorCode);
}
};
private class ScanAdapter extends ArrayAdapter<BluetoothDevice> {
private ScannerActivity ctx;
private int resource;
public ScanAdapter(Context context, int resource) {
super(context, resource);
ctx = (ScannerActivity)context;
this.resource = resource;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
BluetoothDevice device = getItem(position);
if (convertView == null) {
convertView = LayoutInflater.from(ctx).inflate(resource, parent, false);
}
TextView txt = (TextView) convertView.findViewById(R.id.scanitem);
txt.setText(device.getAddress() + " - " + device.getName());
// react when selecting item
convertView.setOnClickListener(new OnClickListener() {
private BluetoothDevice ret = device;
@Override
public void onClick(View v) {
Log.d(msg, "ScanListAdapter: onClick() will return " + ret.getName());
ctx.returnScanResult(ret);
}
});
return convertView;
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scanner);
ListView listView = (ListView) findViewById(R.id.scanlist_view);
scanlistAdapter = new ScanAdapter(this, R.layout.item_scan);
listView.setAdapter(scanlistAdapter);
leScanCallback = new BtleScanCallback();
}
@Override
protected void onResume() {
super.onResume();
startScan();
}
@Override
public void run() {
stopScan();
}
private void addScanResult(ScanResult result) {
BluetoothDevice device = result.getDevice();
/* filter result manually, since the filter API is dysfunctional */
if (device.getName() == null || scanlistAdapter.getPosition(device) >=0) // avoid duplicates and ignore nameless devices
return;
/* FIXME: further filtering on camera service */
scanlistAdapter.add(device);
}
public void returnScanResult(BluetoothDevice device) {
Log.d(msg, "returnScanResult()");
stopScan();
EditText pincode = (EditText) findViewById(R.id.pincode);
Intent intent = new Intent();
intent.putExtra("pincode", pincode.getText().toString());
intent.putExtra("btdevice", device);
setResult(RESULT_OK, intent);
finish();
}
private void startScan() {
btScanner = BluetoothAdapter.getDefaultAdapter().getBluetoothLeScanner();
ScanSettings settings = new ScanSettings.Builder()
.setScanMode(ScanSettings.SCAN_MODE_LOW_POWER)
//.setCallbackType(ScanSettings.MATCH_NUM_ONE_ADVERTISEMENT)
.build();
// Note: Filtering does not work. Must filter in the callback an
List<ScanFilter> filters = new ArrayList<>();
// filters.add(new ScanFilter.Builder().setServiceUuid(ParcelUuid.fromString("0000d001-0000-1000-8000-00805f9b34fb")).build());
filters.add(new ScanFilter.Builder().build());
Log.d(msg, "entered scanForCamera()");
if (btScanner == null) {
Log.d(msg, "getBluetoothLeScanner() returned NULL");
}
btScanner.startScan(filters, settings, leScanCallback);
Handler mHandler = new Handler();
mHandler.postDelayed(this, SCAN_PERIOD);
mScanning = true;
Log.d(msg, "started scanning");
}
private void stopScan() {
btScanner.stopScan(leScanCallback);
leScanCallback = null;
mScanning = false;
Log.d(msg, "stopped scanning");
}
}
|
