要实现Android应用程序连续扫描蓝牙设备的功能,可以按照以下步骤进行:
在AndroidManifest.xml文件中添加蓝牙权限:
创建一个BluetoothAdapter对象来进行蓝牙操作。在Activity的onCreate()方法中初始化BluetoothAdapter:
private BluetoothAdapter bluetoothAdapter;
...
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
}
创建一个BroadcastReceiver来接收蓝牙扫描结果。在Activity中注册BroadcastReceiver:
private BroadcastReceiver bluetoothReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
// 处理扫描到的设备
}
}
};
...
@Override
protected void onResume() {
super.onResume();
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(bluetoothReceiver, filter);
}
...
@Override
protected void onPause() {
super.onPause();
unregisterReceiver(bluetoothReceiver);
}
在需要开始扫描蓝牙设备的地方调用startDiscovery()方法:
bluetoothAdapter.startDiscovery();
在需要停止扫描蓝牙设备的地方调用cancelDiscovery()方法:
bluetoothAdapter.cancelDiscovery();
这样就实现了Android应用程序连续扫描蓝牙设备的结构。你可以根据需要在BroadcastReceiver中处理扫描到的设备信息,比如显示在列表中或者进行其他操作。