Java I';我正在尝试在Android Studio中实现蓝牙功能,在连接问题上需要一些帮助

Java I';我正在尝试在Android Studio中实现蓝牙功能,在连接问题上需要一些帮助,java,android,multithreading,bluetooth,Java,Android,Multithreading,Bluetooth,我使用了Bluetooth API,下面的代码用于打开/关闭、显示配对设备列表和连接配对设备。 其他功能运行良好,但连接设备不起作用。 我尝试使用线程双向,当蓝牙打开时,serverthread(acceptthread)生成并启动。当我在列表中选择设备时,clientthread(connectthread)生成并启动。这是我的意图,但当我尝试在手机上连接时,应用程序被关闭(几乎在客户端,偶尔在服务器上)。 我想可能是UUID问题,所以我检查了UUID 00enter code here001

我使用了Bluetooth API,下面的代码用于打开/关闭、显示配对设备列表和连接配对设备。 其他功能运行良好,但连接设备不起作用。 我尝试使用线程双向,当蓝牙打开时,serverthread(acceptthread)生成并启动。当我在列表中选择设备时,clientthread(connectthread)生成并启动。这是我的意图,但当我尝试在手机上连接时,应用程序被关闭(几乎在客户端,偶尔在服务器上)。 我想可能是UUID问题,所以我检查了UUID 00
enter code here
001101-0000-1000-8000-00805F9B34FB,但没有帮助。
enter code here
很抱歉导入代码块,我非常感谢您的帮助

'''
package com.practice.bluetoothmodule;

import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.SystemClock;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.UUID;
import java.util.concurrent.ExecutionException;

public class MainActivity extends AppCompatActivity {

    TextView bthStatus;
    Button bthOn;
    Button bthOff;
    Button bthCon;

    BluetoothAdapter bthAdapter;
    Set<BluetoothDevice> pairedDevices;
    List<String> listofPairedDevices;
    private String btAddress=null;

    BluetoothDevice bthDevice;

    AcceptThread acceptThread;
    ConnectThread connectThread;
    private Handler mHandler = null;

    final static int BT_REQUEST_ENABLE=1;
    final static UUID BT_UUID = UUID.fromString("fa87c0d0-afac-11de-8a39-0800200c9a66");

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        bthStatus = (TextView)findViewById(R.id.text_check);
        bthOn = (Button)findViewById(R.id.bth_on);
        bthOff=(Button)findViewById(R.id.bth_off);
        bthCon=(Button)findViewById(R.id.dev_con);

        bthAdapter=BluetoothAdapter.getDefaultAdapter();

        bthOn.setOnClickListener(new Button.OnClickListener(){
            @Override
            public void onClick(View view){
                bluetoothOn();
            }
        });

        bthOff.setOnClickListener(new Button.OnClickListener(){
            @Override
            public void onClick(View view){
                bluetoothOff();
            }
        });

        bthCon.setOnClickListener(new Button.OnClickListener(){
            @Override
            public void onClick(View view){
                listPairedDevices();
            }
        });

    }

    @Override
    public void onStart(){
        super.onStart();
    }

    @Override
    public void onDestroy(){
        super.onDestroy();

        if(acceptThread != null){
            acceptThread.cancel();
            acceptThread=null;
        }

        if(connectThread != null){
            connectThread.cancel();
            connectThread=null;
        }


    }

    void bluetoothOn(){
        if(bthAdapter == null){
            Toast.makeText(getApplicationContext(),"블루투스를 지원하지 않는 기기입니다",Toast.LENGTH_SHORT).show();
        }
        else{
            if(bthAdapter.isEnabled()){
                Toast.makeText(getApplicationContext(),"블루투스가 이미 활성화된 상태입니다",Toast.LENGTH_SHORT).show();
            }
            else{
                Toast.makeText(getApplicationContext(),"블루투스가 활성화 되어 있지 않습니다",Toast.LENGTH_SHORT).show();
                Intent intentBthEnable = new Intent(bthAdapter.ACTION_REQUEST_ENABLE);
                startActivityForResult(intentBthEnable,BT_REQUEST_ENABLE);
            }
        }
    }

    void bluetoothOff(){
        if(bthAdapter.isEnabled()){
            bthAdapter.disable();
            Toast.makeText(getApplicationContext(),"블루투스가 비활성화 되었습니다.",Toast.LENGTH_SHORT).show();
            bthStatus.setText("비활성화");
        }
        else{
            Toast.makeText(getApplicationContext(),"블루투스가 이미 비활성화 상태입니다",Toast.LENGTH_SHORT).show();
        }
    }

    @Override
    protected void onActivityResult(int requestCode,int resultCode,Intent data){
        switch(requestCode){
            case BT_REQUEST_ENABLE:
                if(resultCode == RESULT_OK){
                    Toast.makeText(getApplicationContext(),"블루투스 활성화",Toast.LENGTH_LONG).show();
                    bthStatus.setText("활성화");
                    start();
                } else if(resultCode == RESULT_CANCELED){
                    Toast.makeText(getApplicationContext(),"취소",Toast.LENGTH_LONG).show();
                    bthStatus.setText("비활성화");
                }
                break;
        }
        super.onActivityResult(requestCode,resultCode,data);
    }

    void listPairedDevices(){
        if(bthAdapter.isEnabled()){
            pairedDevices = bthAdapter.getBondedDevices();

            if(pairedDevices.size()>0){
                AlertDialog.Builder builder = new AlertDialog.Builder(this);
                builder.setTitle("장치 선택");

                listofPairedDevices = new ArrayList();
                for(BluetoothDevice device: pairedDevices){
                    listofPairedDevices.add(device.getName());
                }
                final CharSequence[] items= listofPairedDevices.toArray(new CharSequence[listofPairedDevices.size()]);
                listofPairedDevices.toArray(new CharSequence[listofPairedDevices.size()]);

                builder.setItems(items, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int item) {
                        connectSelectedDevice(items[item].toString());
                    }
                });
                AlertDialog alert=builder.create();
                alert.show();
            }
            else{
                Toast.makeText(getApplicationContext(),"페어링된 장치가 없습니다",Toast.LENGTH_LONG).show();
            }
        }
        else{
            Toast.makeText(getApplicationContext(),"블루투스가 비활성화 되어 있습니다.",Toast.LENGTH_LONG).show();
        }
    }

    void connectSelectedDevice(String selectedDeviceName){
        for(BluetoothDevice tempDevice: pairedDevices){
            if(selectedDeviceName.equals(tempDevice.getName())){
                bthDevice=tempDevice;
                btAddress=bthDevice.getAddress();
                break;
            }
        }
        connect(bthDevice);
        //Toast.makeText(getApplicationContext(),"연결 시도"+bthDevice.getName(),Toast.LENGTH_LONG).show();
    }

    public synchronized void start(){
        acceptThread = new AcceptThread();
        acceptThread.start();
    }

    public synchronized void connect(BluetoothDevice device){
        connectThread=new ConnectThread(device);
        connectThread.start();
    }

    private class AcceptThread extends Thread{
        private final BluetoothServerSocket mmServerSocket;

        public AcceptThread(){
            BluetoothServerSocket tmp=null;
            try{
                tmp=bthAdapter.listenUsingRfcommWithServiceRecord("Listen",BT_UUID);
                Toast.makeText(getApplicationContext(),"서버 열림",Toast.LENGTH_LONG).show();
            }catch(IOException e){
                Toast.makeText(getApplicationContext(),"서버 안열림",Toast.LENGTH_LONG).show();
            }
            mmServerSocket=tmp;
        }

        public void run(){
            BluetoothSocket socket=null;
            while(true){
                try{
                    socket=mmServerSocket.accept();
                } catch(IOException e){
                    break;
                }
                if(socket != null){
                    Toast.makeText(getApplicationContext(),"연결됨",Toast.LENGTH_SHORT).show();
                    try{
                        sleep(3000);
                    } catch (Exception e){}
                }
            }
        }

        public void cancel(){
            try{
                mmServerSocket.close();
            } catch(IOException e){
                e.printStackTrace();
            }
        }
    }


    private class ConnectThread extends  Thread{
        private final BluetoothSocket mmSocket;
        private final BluetoothDevice mmDevice;

        public ConnectThread(BluetoothDevice device){
            BluetoothSocket tmp=null;
            mmDevice=device;
            try{
                tmp=device.createRfcommSocketToServiceRecord(BT_UUID);
                //Toast.makeText(getApplicationContext(),"클라 초기화 됨.",Toast.LENGTH_LONG).show();
            }catch (IOException e){
                //Toast.makeText(getApplicationContext(),"클라 초기화 실패.",Toast.LENGTH_LONG).show();
            }
            mmSocket=tmp;
            //Toast.makeText(getApplicationContext(),"클라 초기화",Toast.LENGTH_LONG).show();
        }

        public void run() {
            try {
                bthAdapter.cancelDiscovery();
                mmSocket.connect();
                Toast.makeText(getApplicationContext(), "클라이언트 연결", Toast.LENGTH_LONG).show();
            } catch (IOException e) {
                Toast.makeText(getApplicationContext(), "연결실패", Toast.LENGTH_LONG).show();
            }
        }

        public void cancel(){
            try{
                mmSocket.close();
            } catch (IOException e){
                e.printStackTrace();
            }
        }
    }

}

'''
“”
包com.practice.bluetoothmodule;
导入androidx.appcompat.app.AlertDialog;
导入androidx.appcompat.app.appcompat活动;
导入android.bluetooth.BluetoothAdapter;
导入android.bluetooth.bluetooth设备;
导入android.bluetooth.BluetoothServerSocket;
导入android.bluetooth.BluetoothSocket;
导入android.content.DialogInterface;
导入android.content.Intent;
导入android.os.Bundle;
导入android.os.Handler;
导入android.os.SystemClock;
导入android.view.view;
导入android.widget.Button;
导入android.widget.EditText;
导入android.widget.TextView;
导入android.widget.Toast;
导入java.io.IOException;
导入java.io.InputStream;
导入java.io.OutputStream;
导入java.io.UnsupportedEncodingException;
导入java.util.ArrayList;
导入java.util.List;
导入java.util.Set;
导入java.util.UUID;
导入java.util.concurrent.ExecutionException;
公共类MainActivity扩展了AppCompatActivity{
文本视图bthStatus;
按钮按钮;
巴顿霍夫;
按钮bthCon;
蓝牙适配器;
设置配对设备;
成对设备列表;
私有字符串btAddress=null;
蓝牙设备;
接受线程接受线程;
连接螺纹连接螺纹;
私有处理程序mHandler=null;
最终静态int BT_请求_启用=1;
最终静态UUID BT_UUID=UUID.fromString(“fa87c0d0-afac-11de-8a39-0800200c9a66”);
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bthStatus=(TextView)findViewById(R.id.text\u检查);
bthOn=(按钮)findViewById(R.id.bth_on);
bthOff=(按钮)findViewById(R.id.bth_off);
bthCon=(按钮)findViewById(R.id.dev\u con);
bthAdapter=BluetoothAdapter.getDefaultAdapter();
bthOn.setOnClickListener(新建按钮.OnClickListener(){
@凌驾
公共void onClick(视图){
蓝牙();
}
});
bthOff.setOnClickListener(新建按钮.OnClickListener(){
@凌驾
公共void onClick(视图){
bluetoothOff();
}
});
setOnClickListener(新建按钮.OnClickListener(){
@凌驾
公共void onClick(视图){
listPairedDevices();
}
});
}
@凌驾
public void onStart(){
super.onStart();
}
@凌驾
公共空间{
super.ondestory();
if(acceptThread!=null){
acceptThread.cancel();
acceptThread=null;
}
if(connectThread!=null){
connectThread.cancel();
connectThread=null;
}
}
虚空蓝牙(){
if(bthAdapter==null){
Toast.makeText(getApplicationContext(),”블루투스를 지원하지 않는 기기입니다",吐司。长度(短)。show();
}
否则{
if(bthAdapter.isEnabled()){
Toast.makeText(getApplicationContext(),”블루투스가 이미 활성화된 상태입니다“,Toast.LENGTH_SHORT).show();
}
否则{
Toast.makeText(getApplicationContext(),”블루투스가 활성화 되어 있지 않습니다“,Toast.LENGTH_SHORT).show();
意向意向书表格=新意向书(bthAdapter.ACTION\u REQUEST\u ENABLE);
startActivityForResult(可管理、BT请求和启用);
}
}
}
void bluetoothOff(){
if(bthAdapter.isEnabled()){
bthAdapter.disable();
Toast.makeText(getApplicationContext(),”블루투스가 비활성화 되었습니다.“,Toast.LENGTH_SHORT).show();
bthStatus.setText(“비활성화");
}
否则{
Toast.makeText(getApplicationContext(),”블루투스가 이미 비활성화 상태입니다“,Toast.LENGTH_SHORT).show();
}
}
@凌驾
受保护的void onActivityResult(int请求代码、int结果代码、意图数据){
开关(请求代码){
案例BT_请求_启用:
if(resultCode==RESULT\u OK){
Toast.makeText(getApplicationContext(),”블루투스 활성화“,Toast.LENGTH_LONG).show();
bthStatus.setText(“활성화");
start();
}else if(resultCode==RESULT\u取消){
Toast.makeText(getApplicationContext(),”취소“,Toast.LENGTH_LONG).show();
bthStatus.setText(“비활성화");
}
打破
}
super.onActivityResult(请求代码、结果代码、数据);
}
void listPairedDevices(){
if(bthAdapter.isEnabled()){
pairedDevices=bthAdapter.getBondedDevices();
如果(pairedDevices.size()>0){
AlertDialog.Builder=新建AlertDialog.Builder(此);
builder.setTitle(“장치 선택");
listofPairedDevices=new ArrayList();
用于(蓝牙设备:pairedDevices){
空气列表