Question

再次......

我正在尝试创建蓝牙连接，我已经拥有该设备的MAC地址，但是当我使用createInsecureRfcommSocketToServiceRecord时，它给了我一个关于UUID的错误......有没有人知道为什么会这样？ ..我提前感谢你的帮助。

这是Main：

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();

    }



}

Answer 1

似乎AndroidStudio / IntelliJ在某处有错误，因此未添加java util jar来编译classpath。具有讽刺意味的是 - 键入import语句时自动完成功能正常。很奇怪，在你的情况下 - 对于java.util.Set它已经解决了。 Set可能已在其他地方提供，而我java.util.Date也有同样的问题。

对我来说，这是一个全新的项目，但解决方案是退出AndroidStudio，删除.iml文件和.idea目录并重新打开项目。从gradle重新同步后 - 一切都很好。

UUID无法解决错误

1 个答案: