又来了...
我正在尝试创建蓝牙连接，我已经有设备的MAC地址，但当我使用createInsecureRfcommSocketToServiceRecord时，它给了我一个UUID错误...有人知道这是为什么吗？...我提前感谢帮助.
主要内容如下：
package com.example.mustangsound;
//import java.util.UUID;
import java.util.Set;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.IntentFilter;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Toast;
public class MainActivity extends Activity {
String toastText = "";
private BluetoothDevice btDevice;
private BluetoothSocket btSocket;
private String btAddress = "11:22:33:44:44:44";
String mArrayAdapter = "";
private BluetoothAdapter mBluetoothAdapter = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void BTConnect (View v){
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null) {
Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show();
finish();
return;
}
else{
toastText="Connecting to Mustang Sound Bluetooth receiver.... please wait";
Toast.makeText(MainActivity.this, toastText, Toast.LENGTH_SHORT).show();
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(btAddress);
btSocket = device.createInsecureRfcommSocketToServiceRecord(UUID.fromString("0000111F-0000-1000-8000-00805F9B34FB"));
btSocket.connect();
}
}
public void LightsOn (View v){
toastText="Sounds Lights On";
Toast.makeText(MainActivity.this, toastText, Toast.LENGTH_SHORT).show();
}
public void LightsOff (View v){
toastText="Sounds Lights Off";
Toast.makeText(MainActivity.this, toastText, Toast.LENGTH_SHORT).show();
}
public void DoorsOpen (View v){
toastText="Opening Sound doors";
Toast.makeText(MainActivity.this, toastText, Toast.LENGTH_SHORT).show();
}
public void DoorsClose (View v){
toastText="Closing Sound doors";
Toast.makeText(MainActivity.this, toastText, Toast.LENGTH_SHORT).show();
}
public void SysOn (View v){
toastText="IT'S ALIVE!!!!!.....IT'S ALIIIIIVEEEEEE";
Toast.makeText(MainActivity.this, toastText, Toast.LENGTH_SHORT).show();
}
public void SysOff (View v){
toastText="Mustnag Sound OFF";
Toast.makeText(MainActivity.this, toastText, Toast.LENGTH_SHORT).show();
}
}
2条答案
按热度按时间72qzrwbm1#
似乎AndroidStudio/IntelliJ在某个地方有一个bug，所以java util jar没有被添加到编译类路径中。具有讽刺意味的是，当输入
import语句时，自动完成功能正常工作。奇怪的是，在你的情况下，对于java.util.Set，它工作了。Set可能在其他地方可用，而我在java.util.Date上遇到了同样的问题。对我来说，这发生在一个全新的项目上，但解决方案是退出AndroidStudio，删除
.iml文件和.idea目录，然后重新打开项目。fykwrbwg2#
是，重启IntelliJ后，问题得到解决。这适用于2022 IntelliJ版本。