如何查询蓝牙绑定（配对）设备列表？答案

【问题标题】：How to query a list of Bluetooth bonded (paired) devices?如何查询蓝牙绑定（配对）设备列表？
【发布时间】：2016-04-02 15:44:26
【问题描述】：

我想使用 Android 蓝牙 API 显示绑定设备列表，但我不知道为什么在我的设备上运行此代码时没有显示 toast？顺便说一句，toast 将包含每个设备的名称。

package com.example.fatma.cst;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;
import android.widget.Toast;

import java.util.Set;
import java.util.Vector;

public class MainActivity extends AppCompatActivity {
    TextView txt = null;
    private static final int REQUEST_ENABLE_BT = 1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        final Vector mArrayAdapter = null;
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        BluetoothAdapter bluetoothAdapter=BluetoothAdapter.getDefaultAdapter();

        if(bluetoothAdapter==null){
            Toast t=new Toast(this);
            t.setText("Sorry your phone do not support Bluetooth");
            t.show();
        }
        else
        {
            if (!bluetoothAdapter.isEnabled()) {
                Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
            }

            if(REQUEST_ENABLE_BT!=0) {



    /* bluetoothAdapter.startDiscovery();
                BroadcastReceiver mReceiver = new BroadcastReceiver() {
                    public void onReceive(Context context, Intent intent) {
                        String action = intent.getAction();

                        //Finding devices
                        if (BluetoothDevice.ACTION_FOUND.equals(action)) {
                            // Get the BluetoothDevice object from the Intent
                            BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                            // Add the name and address to an array adapter to show in a ListView
                            mArrayAdapter.add(device.getName() + "\n" + device.getAddress());



                        }
                    }

                };*/

                //IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
               // registerReceiver(mReceiver, filter);
               Set<BluetoothDevice> devices;

                devices = bluetoothAdapter.getBondedDevices();
                for (BluetoothDevice blueDevice : devices) {
                    Toast.makeText(this, "Device = " + blueDevice.getName(), Toast.LENGTH_SHORT).show();
                }
            }
        }


    }

}

【问题讨论】：

我认为您的问题实际上是关于为什么 Toast 消息没有在您的设备上显示给您。

标签： android bluetooth

【解决方案1】：

这是我使用的一种方法（这没什么特别的）来迭代和记录或烘烤配对的蓝牙设备。您的代码似乎在做同样的事情。

void iterateBluetoothDevices() {
    BluetoothAdapter btAdapter = BluetoothAdapter.getDefaultAdapter();
    if (btAdapter != null) {
        Set<BluetoothDevice> pairedDevices = btAdapter.getBondedDevices();
        Log.i(LOGTAG, String.format("found %d bluetooth devices", (pairedDevices != null) ? pairedDevices.size() : 0));
        if (pairedDevices.size() > 0) {
            for (BluetoothDevice d: pairedDevices) {
                String btID = String.format("bluetooth device [%s]  type: %s", d.getName(), d.getType());
                Log.i(LOGTAG, btID);
                Toast.makeText(this, btID, Toast.LENGTH_SHORT).show();
            }
        }
    }
}

【讨论】：

【解决方案2】：

通过在 for 循环中添加 Toast 来尝试此代码。

Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
// If there are paired devices
if (pairedDevices.size() > 0) {
// Loop through paired devices
for (BluetoothDevice device : pairedDevices) {
    // Add the name and address to an array adapter to show in a ListView
    mArrayAdapter.add(device.getName() + "\n" + device.getAddress());
}
}

你也可以参考这个Bluetooth Android Developer

【讨论】：

好的，我会尝试寻找其他解决方案