1.加入需要的权限

2.扫描界面实现

4.功能实现

package myapplication.com.myblue;import android.bluetooth.BluetoothAdapter;import android.bluetooth.BluetoothDevice;import android.content.BroadcastReceiver;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.content.IntentFilter;import android.os.Handler;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.ImageButton;import android.widget.ImageView;import android.widget.ListView;import android.widget.TextView;import java.util.ArrayList;import java.util.List;import myapplication.com.myblue.activity.Zhuye_Activity;import myapplication.com.myblue.adapter.MyAdapter;public class Search_Activity extends AppCompatActivity {    BluetoothAdapter mBluetoothAdapter;    ArrayList
     
       datas = new ArrayList
      
       ();    ListView listview;  //  ArrayAdapter
       
         ad;    MyAdapter ad;    ImageView imageView1;    ImageView textView_shoushuo;    TextView textView1;    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_search);        Intent intent=new Intent(this,Zhuye_Activity.class);        startActivity(intent);        initView();        mBluetoothAdapter=BluetoothAdapter.getDefaultAdapter();        IntentFilter filter=new IntentFilter(BluetoothDevice.ACTION_FOUND);        registerReceiver(mReceiver,filter);        IntentFilter filter2=new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);        registerReceiver(mReceiver,filter2);        textView_shoushuo.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                if(!mBluetoothAdapter.isEnabled())                {                    mBluetoothAdapter.enable();                }                mBluetoothAdapter.startDiscovery();                textView1.setText("搜索中...");            }        });       // ad = new ArrayAdapter
        
         (this, android.R.layout.simple_list_item_1, datas);        ad=new MyAdapter(datas,getApplicationContext());        listview.setAdapter(ad);    }     public void initView(){         imageView1= (ImageView) findViewById(R.id.imageView1);         imageView1.setOnClickListener(new View.OnClickListener() {             @Override             public void onClick(View v) {                 finish();             }         });         listview= (ListView) findViewById(R.id.listView);         textView_shoushuo= (ImageView) findViewById(R.id.textView_shoushuo);         textView1= (TextView) findViewById(R.id.textView1);         listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {             @Override             public void onItemClick(AdapterView
          parent, View view, int position, long id) {                String s= (String) parent.getItemAtPosition(position);                 Intent intent=new Intent(Search_Activity.this,Zhuye_Activity.class);                 intent.putExtra("mac",s);                 /**                  * 离开本页面时广播就解除注册，并关闭蓝牙                  * **/                 mBluetoothAdapter.disable();                 unregisterReceiver(mReceiver);                 startActivity(intent);             }         });    }    /**     *     * 解除注册     * **/    public void onDestroy() {        super.onDestroy();        //解除注册        unregisterReceiver(mReceiver);        Log.e("destory","解除注册");    }    /**     * 打开蓝牙设备     * **/    public void enable() {        //蓝牙设备        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();        //启用        mBluetoothAdapter.enable();    }    /***     * 定义广播接收     * **/    private BroadcastReceiver mReceiver=new BroadcastReceiver(){        @Override        public void onReceive(Context context, Intent intent) {            String action=intent.getAction();            Log.e("ywq", action);            if(action.equals(BluetoothDevice.ACTION_FOUND))            {                BluetoothDevice device=intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);                if(device.getBondState()==BluetoothDevice.BOND_BONDED)                {    //显示已配对设备                  //  这里的datas.indexof()用来判断是否重复添加
        
       
      
     

　　　　　　　　　　　　String s=device.getName()+"*"+device.getAddress(); 　　　　　　　　　　if(datas.indexOf(s)==-1){
         　　　　　　　　　　　　　　 datas.add(device.getName()+"*"+device.getAddress()); 　　　　　　　　　　　　}

}else if(device.getBondState()!=BluetoothDevice.BOND_BONDED) {

　　　　　　　　　　　　String s=device.getName()+"*"+device.getAddress(); 　　　　　　　　　　　　　　　if(datas.indexOf(s)==-1){
         　　　　　　　　　　　　　　　　 datas.add(device.getName()+"*"+device.getAddress()); 　　　　　　　　　　　　　　　　　　}

} }else if(action.equals(BluetoothAdapter.ACTION_DISCOVERY_FINISHED)){ // text2.setText("搜索完成..."); textView1.setText("搜索完成..."); } } }; }

4.ListView适配器

package myapplication.com.myblue.adapter;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.TextView;import java.util.ArrayList;import myapplication.com.myblue.R;/** * Created by Administrator on 2016/11/24. */public class MyAdapter extends BaseAdapter {    ArrayList
     
       datas;    Context context;    public MyAdapter(ArrayList
      
        datas, Context context) {        this.datas = datas;        this.context = context;    }    @Override    public int getCount() {        return datas.size();    }    @Override    public Object getItem(int position) {        return datas.get(position);    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        ViewHolder holder;        if(convertView==null){            convertView= LayoutInflater.from(context).inflate(R.layout.searchitem_layout, null);            holder=new ViewHolder();            holder.textViewl=(TextView) convertView.findViewById(R.id.textView_item);            convertView.setTag(holder);        }else{            holder=(ViewHolder) convertView.getTag();        }        String s=datas.get(position);        holder.textViewl.setText("MAC:"+s);        return convertView;    }    class  ViewHolder{        TextView textViewl;    }}
      
     

ListView—item布局