要检查Android蓝牙LE设备是否超出范围,可以使用以下步骤:
BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (bluetoothAdapter == null || !bluetoothAdapter.isEnabled()) {
// 蓝牙未启用
return;
}
BluetoothAdapter.LeScanCallback leScanCallback = new BluetoothAdapter.LeScanCallback() {
@Override
public void onLeScan(final BluetoothDevice device, int rssi, byte[] scanRecord) {
// 处理扫描结果
}
};
bluetoothAdapter.startLeScan(leScanCallback);
@Override
public void onLeScan(final BluetoothDevice device, int rssi, byte[] scanRecord) {
if (rssi < -70) {
// 设备超出范围
} else {
// 设备在范围内
}
}
bluetoothAdapter.stopLeScan(leScanCallback);
完整的示例代码如下:
BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (bluetoothAdapter == null || !bluetoothAdapter.isEnabled()) {
// 蓝牙未启用
return;
}
BluetoothAdapter.LeScanCallback leScanCallback = new BluetoothAdapter.LeScanCallback() {
@Override
public void onLeScan(final BluetoothDevice device, int rssi, byte[] scanRecord) {
if (rssi < -70) {
// 设备超出范围
} else {
// 设备在范围内
}
}
};
bluetoothAdapter.startLeScan(leScanCallback);
// 扫描一段时间后停止扫描
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
bluetoothAdapter.stopLeScan(leScanCallback);
}
}, 10000); // 10秒后停止扫描
请注意,上述代码只是一个简单的示例,可能需要根据你的实际需求进行适当的修改和扩展。