ANDROID_MARS学习笔记_S03_001_获取蓝牙匹配列表

一、代码

1.xml
(1)AndroidManifest.xml

增加

<uses-permission android:name="android.permission.BLUETOOTH"/>

2.java
(1)MainActivity.java

package com.bluetooth1;

import java.util.Iterator;
import java.util.Set;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {

    private Button button = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        button = (Button)findViewById(R.id.buttonId);
        button.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                //获得BluetoothAdapter对象，该API是android 2.0开始支持的
                BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
                //adapter不等于null，说明本机有蓝牙设备
                if(adapter != null) {
                    System.out.println("本机有蓝牙设备！");
                    //如果蓝牙设备未开启
                    if(!adapter.isEnabled()) {
                        Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                        //请求开启蓝牙设备
                        startActivity(intent);
                    }
                    //获得已配对的远程蓝牙设备的集合
                    Set<BluetoothDevice> devices = adapter.getBondedDevices();
                    if(devices.size() > 0) {
                        for(Iterator<BluetoothDevice> it = devices.iterator() ; it.hasNext() ; ) {
                            //打印出远程蓝牙设备的物理地址
                            BluetoothDevice device = it.next();
                            System.out.println(device.getAddress());
                        }
                    } else {
                        System.out.println("还没有已配对的远程蓝牙设备！");
                    }
                } else {
                    System.out.println("本机没有蓝牙设备！");
                }
            }
        });
    }
}