// 判断设备是否重复 if (!BleData.checkMacIsExist(deviceList, device.getAddress())) { deviceList.add(new BleData(device, rssi)); if (mScanBack != null) mScanBack.findDeviceRefresh(); }
时间: 2024-04-29 07:20:34 浏览: 14
这段代码的作用是判断蓝牙扫描结果中是否存在重复的设备。如果设备列表`deviceList`中不存在当前扫描到的设备`device`,则将设备和信号强度`rssi`添加到设备列表中。如果添加成功,还会通过回调`mScanBack`通知设备列表已更新。这段代码的作用是避免重复的设备出现在设备列表中,提高了应用的性能和使用体验。
相关问题
BluetoothLeScanner.startScan方法代码示例实现蓝牙扫描
好的,以下是BluetoothLeScanner.startScan方法代码示例实现蓝牙扫描:
```java
// 获取蓝牙适配器
BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (bluetoothAdapter == null) {
// 设备不支持蓝牙
return;
}
// 获取蓝牙低功耗扫描器
BluetoothLeScanner bluetoothLeScanner = bluetoothAdapter.getBluetoothLeScanner();
if (bluetoothLeScanner == null) {
// 设备不支持蓝牙低功耗
return;
}
// 定义扫描过滤器,只扫描符合 UUID 的设备
List<ScanFilter> scanFilters = new ArrayList<>();
ScanFilter scanFilter = new ScanFilter.Builder()
.setServiceUuid(ParcelUuid.fromString("0000180d-0000-1000-8000-00805f9b34fb")) // 服务 UUID
.build();
scanFilters.add(scanFilter);
// 定义扫描设置,设置扫描模式和回调
ScanSettings scanSettings = new ScanSettings.Builder()
.setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY) // 低延迟模式
.build();
// 开始扫描
bluetoothLeScanner.startScan(scanFilters, scanSettings, new ScanCallback() {
@Override
public void onScanResult(int callbackType, ScanResult result) {
// 扫描到设备的回调
BluetoothDevice device = result.getDevice();
String name = device.getName();
String address = device.getAddress();
int rssi = result.getRssi();
// 处理扫描结果
Log.d(TAG, "扫描到设备:name=" + name + ", address=" + address + ", rssi=" + rssi);
}
@Override
public void onScanFailed(int errorCode) {
// 扫描失败的回调
Log.e(TAG, "扫描失败,errorCode=" + errorCode);
}
});
// 停止扫描
bluetoothLeScanner.stopScan(new ScanCallback() {});
```
希望能够帮到你。
来一个com.bitalino.bitalinodroid的java程序
以下是一个使用com.bitalino.bitalinodroid库的Java程序,它可以连接到Bitalino设备并读取其传感器数据:
```java
import android.os.Bundle;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.Context;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import com.bitalino.BITalinoDevice;
import com.bitalino.BITalinoFrame;
import com.bitalino.BITalinoState;
import com.bitalino.comm.BITalinoAndroidDevice;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Set;
public class MainActivity extends Activity {
private BluetoothAdapter mBluetoothAdapter;
private ArrayAdapter<String> mPairedDevicesArrayAdapter;
private BITalinoAndroidDevice mDevice;
private Thread mThread;
private boolean mRunning = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mPairedDevicesArrayAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1);
ListView pairedListView = (ListView) findViewById(R.id.paired_devices);
pairedListView.setAdapter(mPairedDevicesArrayAdapter);
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null) {
Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show();
finish();
return;
}
if (!mBluetoothAdapter.isEnabled()) {
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, 1);
} else {
showPairedDevices();
}
}
private void showPairedDevices() {
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
if (pairedDevices.size() > 0) {
for (BluetoothDevice device : pairedDevices) {
mPairedDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress());
}
} else {
mPairedDevicesArrayAdapter.add("No paired devices found");
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_refresh:
mPairedDevicesArrayAdapter.clear();
showPairedDevices();
return true;
case R.id.action_connect:
connectToDevice();
return true;
case R.id.action_disconnect:
disconnectFromDevice();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void connectToDevice() {
String deviceAddress = mPairedDevicesArrayAdapter.getItem(0).substring(17);
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(deviceAddress);
try {
mDevice = new BITalinoAndroidDevice(device);
mDevice.open();
mDevice.start();
mRunning = true;
mThread = new Thread(new Runnable() {
@Override
public void run() {
while (mRunning) {
try {
BITalinoFrame[] frames = mDevice.read(1000);
for (BITalinoFrame frame : frames) {
System.out.println(frame.toString());
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
});
mThread.start();
} catch (IOException e) {
e.printStackTrace();
}
}
private void disconnectFromDevice() {
mRunning = false;
try {
mDevice.stop();
mDevice.close();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
protected void onDestroy() {
super.onDestroy();
disconnectFromDevice();
}
}
```
请注意,您需要在Android设备上安装BitalinoDroid应用程序并将其连接到Bitalino设备才能使用此程序。此外,您可能需要根据您的设备和传感器配置调整代码。在此示例中,我们只是将Bitalino帧打印到控制台。你可以根据需要在此基础上进行扩展。
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