Android之蓝牙

直接看代码吧，如果说安卓版本大于6.0除了蓝牙两个权限还需加入一个Location权限

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





package com.example.study_ten
import android.Manifest;
import android.app.Service;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.location.LocationManager;
import android.os.Build;
import android.os.IBinder;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.ListView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    ListView listView;//ListView列表
    List<Blue_Bean>list=new ArrayList<>();//ListArrayList数组里面存放自定义的Bean类
    MyAdapter myAdapter; //自定义myAdapter


    String[] perMissions;  //权限数组
    boolean flag=true;
    boolean ok=true;

    BluetoothManager bluetoothManager;
    BluetoothAdapter bluetoothAdapter;
    BluetoothReciveer bluetoothReciveer;

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

        perMissions=new String[]{Manifest.permission.BLUETOOTH,Manifest.permission.BLUETOOTH_ADMIN,Manifest.permission.ACCESS_COARSE_LOCATION};

        init();
        bluetoothManager= (BluetoothManager) getSystemService(BLUETOOTH_SERVICE);
        bluetoothAdapter=bluetoothManager.getAdapter();

        if(bluetoothAdapter==null){
            finish();
            return;
        }
        bluetoothReciveer=new BluetoothReciveer();

        IntentFilter intentFilter=new IntentFilter();
        intentFilter.addAction(BluetoothDevice.ACTION_FOUND);//可搜索
        intentFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);//搜索状态
        intentFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);//绑定状态
        registerReceiver(bluetoothReciveer,intentFilter);
        initDate();
        Log.e("##",list.toString());

    }

    private void init(){
        findViewById(R.id.start).setOnClickListener(this);
        findViewById(R.id.search).setOnClickListener(this);
        findViewById(R.id.stop).setOnClickListener(this);
        listView=findViewById(R.id.list);
        myAdapter=new MyAdapter(this,list);
        listView.setAdapter(myAdapter);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if(requestCode==200){
            for(int i=0;i<grantResults.length;i++){
                if(grantResults[i]!=PackageManager.PERMISSION_GRANTED){
                    ok=false;
                }
            }
            if(!ok){
                Toast.makeText(this, "没有权限", Toast.LENGTH_SHORT).show();
            }
        }
    }

    private void initDate(){
        //判断权限是否大于安卓版本6.0
        if(Build.VERSION.SDK_INT>Build.VERSION_CODES.M){
            for(int i=0;i<perMissions.length;i++){
                if(checkSelfPermission(perMissions[i])!= PackageManager.PERMISSION_GRANTED){

                    flag=false;
                }
            }
            if(!flag){
                requestPermissions(perMissions,200);

            }
        }

    }
    @Override
    public void onClick(View v) {

        switch (v.getId()){
            case R.id.start:
                boolean enable = bluetoothAdapter.enable();
                if(!enable){
                    Intent intent = new Intent();
                    intent.setAction(BluetoothAdapter.ACTION_REQUEST_ENABLE);//启动蓝牙
                    intent.setAction(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);//开启当前设备可被发现
                    intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,200);//指定搜索设备时间
                    startActivityForResult(intent,100);
                }
                break;
            case R.id.stop:
                bluetoothAdapter.disable();//关闭蓝牙
                list.clear();
                myAdapter.notifyDataSetChanged();
                break;
            case R.id.search:
                bluetoothAdapter.startDiscovery();//开启搜索
                break;
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(requestCode==100&&requestCode==RESULT_OK){
            Toast.makeText(this, "蓝牙开启成功", Toast.LENGTH_SHORT).show();
        }
    }

    private class BluetoothReciveer extends BroadcastReceiver {

        @Override
        public void onReceive(Context context, Intent intent) {

            String action=intent.getAction();
            Log.e("##",action+"");
            switch (action){
                case BluetoothDevice.ACTION_FOUND:
     
                    //搜索到一台蓝牙设备,进入一次FOUND
                    //搜索到的设备保存到list中
                    BluetoothDevice bluetoothDevice=intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                    Log.e("##","789");
                    Blue_Bean blue_bean=new Blue_Bean();
                    blue_bean.name=bluetoothDevice.getName();
                    blue_bean.address=bluetoothDevice.getAddress();
                    blue_bean.device=bluetoothDevice;


                    list.add(blue_bean);
                    myAdapter.notifyDataSetChanged();
  
                    break;
                case BluetoothAdapter.ACTION_DISCOVERY_FINISHED:
                    //adapter 刷新的方法方法
                    myAdapter.notifyDataSetChanged();
                    break;

            }

        }
    }
}

适配器操作

package com.example.study_ten;

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 org.w3c.dom.Text;

import java.util.ArrayList;
import java.util.List;

public class MyAdapter extends BaseAdapter {
        List<Blue_Bean>list=new ArrayList<>();
        Context context;
    public MyAdapter(MainActivity mainActivity, List<Blue_Bean> list) {
        this.context=mainActivity;
        this.list=list;
    }


    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder viewHolder;
        if (convertView == null) {
            viewHolder = new ViewHolder();
            //两种获取
//            LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
//            convertView = layoutInflater.inflate(R.layout.item, parent, false);
            convertView = View.inflate(context, R.layout.item, null);
            viewHolder.name = convertView.findViewById(R.id.name);
            viewHolder.address = convertView.findViewById(R.id.address);
            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
            viewHolder.name.setText(list.get(position).name);
            viewHolder.address.setText(list.get(position).address);
        }
        return convertView;
    }
    class ViewHolder{
        TextView name;
        TextView address;
    }
}

效果