如何通过单击项目连接到列表视图中的配对蓝牙设备

Question

好吧，所以目前我的应用程序在我的设备上打开蓝牙，然后列出列表视图中的所有配对设备。 我试图这样做，当单击列表视图中的项目时，它将连接到设备（主要用于蓝牙扬声器）。 下面我列出了我的主java文件，其中包含运行我的应用程序的所有代码。 如果有人能让我朝着正确的方向前进，我就会欣赏它。 这也是我的第一个使用蓝牙的项目。

package com.applie.itchaboynathan.appv2;

import android.support.v7.app.AppCompatActivity;
import java.io.IOException;
import java.net.Socket;
import java.util.UUID;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.PopupMenu;
import android.view.MenuItem;
import android.widget.Toast;
import android.bluetooth.BluetoothAdapter;
import android.widget.SeekBar;
import android.widget.TextView;
import android.content.Intent;
import android.widget.ListView;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothProfile;
import java.util.ArrayList;
import android.widget.ArrayAdapter;
import java.util.Set;
import android.os.Handler;


public class MainActivity extends AppCompatActivity {

    private static SeekBar seek_bar;
    private static TextView text_view;
    private BluetoothAdapter BA;
    private Set<BluetoothDevice>pairedDevices;
    Handler handler = new Handler();
    ListView lv;
    ImageView iv;

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

        volumeBar();
        BA = BluetoothAdapter.getDefaultAdapter();
        lv = (ListView)findViewById(R.id.deviceList);
        iv = (ImageView)findViewById(R.id.imgConnection);

        //define menu button
        ImageButton menubutton = (ImageButton)findViewById(R.id.ibtnMenu);
        //enables the button to show a menu
        menubutton.setOnClickListener(new View.OnClickListener()

        {
            @Override
                    public void onClick(View v){
                    final PopupMenu popupMenu = new PopupMenu(getApplicationContext(),v);

                    popupMenu.inflate(R.menu.main_menu);
                popupMenu.show();


                popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {

                @Override
                    public boolean onMenuItemClick(MenuItem item){

                    switch (item.getItemId()) {
                        case R.id.connect:
                            //code for connect item
                            //Delay so the list creates
                            handler.postDelayed(new Runnable() {
                                @Override
                                public void run(){
                                    list();
                                    visible();
                                    iv.setImageResource(R.mipmap.ic_checked);
                                }
                            }, 4200);
                            turnOn();

                            return true;
                        case R.id.disconnect:
                            //code for music item
                            turnOff();
                            iv.setImageResource(R.mipmap.ic_disconnected);
                            listClear();
                            return true;
                        case R.id.music:
                            //code for music item
                            return true;
                        case R.id.play:
                            //code for play item
                            return true;
                        case R.id.pause:
                            //code for pause item

                            return true;

                    }
                    return false;
                }
                });
        }
    });//end of button

}
    //bluettoth enabler
    public void turnOn(){
        if (!BA.isEnabled()) {
            Intent turnOn = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivityForResult(turnOn, 0);
            Toast.makeText(getApplicationContext(), "Turned on",Toast.LENGTH_LONG).show();
        } else {
            Toast.makeText(getApplicationContext(), "Already on", Toast.LENGTH_LONG).show();
        }
    }
    //bluetooth disable
    public void turnOff(){
        BA.disable();
        Toast.makeText(getApplicationContext(), "Turned off" ,Toast.LENGTH_LONG).show();
    }

    public  void visible(){
        Intent getVisible = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
        startActivityForResult(getVisible, 0);
    }

    public void listClear(){
        lv.setAdapter(null);
    }
    public void list(){
        pairedDevices = BA.getBondedDevices();

        ArrayList list = new ArrayList();

        for(BluetoothDevice bt : pairedDevices) list.add(bt.getName());
        Toast.makeText(getApplicationContext(), "Showing Paired Devices",Toast.LENGTH_SHORT).show();

        final ArrayAdapter adapter = new  ArrayAdapter(this,android.R.layout.simple_list_item_1, list);

        lv.setAdapter(adapter);
    }

    //volume bar code
    public void volumeBar(){
        seek_bar = (SeekBar)findViewById(R.id.seekBar);
        text_view =(TextView)findViewById(R.id.txtVolumeLvl);
        text_view.setText("Volume : " + seek_bar.getProgress() + " % ");

        seek_bar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener(){
            int progress_value;
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                progress_value = progress;
                text_view.setText("Volume : " + progress +  " % ");


            }


            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                text_view.setText("Volume : " + progress_value + " % ");

            }
        }
        );
    }
    //end volume bar

    }

Answer 1

您已使用BluetoothSocket连接蓝牙。

使用以下代码进行连接。

 private BluetoothAdapter mBluetoothAdarpter;
 private BluetoothSocket mBtSocket;
 private BluetoothDevice mBTDevice;
 private static final UUID SPP_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
 ..
 ..
 private boolean connectToDevice(String iAdress) {
    try {
        if(mBluetoothAdarpter == null) mBluetoothAdarpter = BluetoothAdapter.getDefaultAdapter();
        mBTDevice = mBluetoothAdarpter.getRemoteDevice(iAdress);
        mBtSocket = mBTDevice.createRfcommSocketToServiceRecord(SPP_UUID);
        mBtSocket.connect();
        return true;
    } catch (IOException e) {
        e.printStackTrace();

    } catch (Exception e) {
        e.printStackTrace();

    }
    return false;
}

Answer 2

尝试这个：

          ArrayList list = new ArrayList();         
          public void list(){
                    pairedDevices = BA.getBondedDevices();               

                for(BluetoothDevice bt : pairedDevices) list.add(bt.getName());
                Toast.makeText(getApplicationContext(), "Showing Paired Devices",Toast.LENGTH_SHORT).show();

                final ArrayAdapter adapter = new  ArrayAdapter(this,android.R.layout.simple_list_item_1, list);

                lv.setAdapter(adapter);

               lv.setOnItemClickListener(new AdapterView.OnItemClickListener () {
               @Override
               public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
                  String selected = list.get(position);
                  for (Iterator<BluetoothDevice> it = pairedDevices.iterator(); it.hasNext(); ) {
                      BluetoothDevice bt = it.next();
                      if (bt.getName().equals(selected){
                      //connect to device
                      }                       
                  }
              });
          }