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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.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
// lots of nice examples: https://www.programcreek.com/java-api-examples/index.php?api=android.bluetooth.le.ScanCallback
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 ScanListAdapter scanlistAdapter;
private class BtleScanCallback extends ScanCallback {
private ScanListAdapter mScanResults;
BtleScanCallback(ScanListAdapter scanResults) {
mScanResults = scanResults;
}
@Override
public void onScanResult(int callbackType, ScanResult result) {
Log.d(msg, "onScanResult(): " + callbackType);
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 void addScanResult(ScanResult result) {
BluetoothDevice device = result.getDevice();
Log.d(msg, "adding " + device.toString());
mScanResults.add(device);
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scanner);
ListView listView = (ListView) findViewById(R.id.scanlist_view);
scanlistAdapter = new ScanListAdapter(this, R.layout.scanitem, R.id.scanitem);
listView.setAdapter(scanlistAdapter);
leScanCallback = new BtleScanCallback(scanlistAdapter);
CharSequence text = "Hello toast!";
Toast.makeText(getApplicationContext(), text, Toast.LENGTH_LONG).show();
Intent intent = new Intent();
intent.putExtra("scan_ret", "This data is returned when scan activity is finished.");
setResult(RESULT_OK, intent);
}
@Override
protected void onResume() {
super.onResume();
startScan();
//finish();
}
@Override
public void run() {
stopScan();
}
public void returnScanResult(BluetoothDevice device) {
Log.d(msg, "returnScanResult()");
Intent intent = new Intent();
intent.putExtra("scan_ret", device.toString());
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");
}
}
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