简单的android 蓝牙发现附近的设备和以连接的设备

概述xml<?xmlversion="1.0"encoding="utf-8"?><LinearLayoutxmlns:android="http://schemas.android.com/apkes/android"xmlns:app="http://schemas.android.com/apkes-auto"xmlns:tools="http://

xml

<?xml version="1.0" enCoding="utf-8"?><linearLayout    xmlns:androID="http://schemas.androID.com/apk/res/androID"    xmlns:app="http://schemas.androID.com/apk/res-auto"    xmlns:tools="http://schemas.androID.com/tools"    androID:layout_wIDth="match_parent"    androID:layout_height="match_parent"    androID:orIEntation="vertical"    tools:context=".MainActivity">    <button        androID:ID="@+ID/btn"        androID:layout_wIDth="match_parent"        androID:layout_height="wrap_content"        androID:text="获取以配对的设备"       />    <button        androID:layout_wIDth="match_parent"        androID:layout_height="wrap_content"        androID:ID="@+ID/bt_scan"        androID:text="扫描设备"        /></linearLayout>

androID java

package com.yifei.myapplication;import androID.bluetooth.BluetoothAdapter;import androID.bluetooth.BluetoothDevice;import androID.content.broadcastReceiver;import androID.content.Context;import androID.content.Intent;import androID.content.IntentFilter;import androID.nfc.Tag;import androID.support.annotation.Nullable;import androID.support.v7.app.AppCompatActivity;import androID.os.Bundle;import androID.util.Log;import androID.vIEw.VIEw;import androID.Widget.button;import androID.Widget.Toast;import java.util.Set;public class MainActivity extends AppCompatActivity {    private static final int REQUEST_CODE = 10;    private BluetoothAdapter mBluetoothAdapter;    private static final String TAG = "MainActivity11";    private button pardevicebtn ;    private button scanBtn;    private  final broadcastReceiver mReceiver = new broadcastReceiver() {        @OverrIDe        public voID onReceive(Context context, Intent intent) {            String action = intent.getAction();            if(BluetoothDevice.ACTION_FOUND.equals(action)){                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);                Log.d(TAG, device.getname()+"\n"+device.getAddress());            }else if(action.equals(BluetoothAdapter.ACTION_disCOVERY_FINISHED)){                Log.d(TAG, "discovery done");            }        }    };    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_main);        mBluetoothAdapter =BluetoothAdapter.getDefaultAdapter();        if(mBluetoothAdapter==null){            Log.e(TAG, "Device not support Bluetooth");        }else {            Toast.makeText(this,"设备支持蓝牙",Toast.LENGTH_LONG).show();        }        pardevicebtn=findVIEwByID(R.ID.btn);        scanBtn  = findVIEwByID(R.ID.bt_scan);        pardevicebtn.setonClickListener(new VIEw.OnClickListener() {            @OverrIDe            public voID onClick(VIEw vIEw) {                Set<BluetoothDevice> pairedDevices=mBluetoothAdapter.getBondedDevices();                for(BluetoothDevice device:pairedDevices){                    Log.d(TAG, "Device name="+device.getname()+" address="+device.getAddress());                }            }        });        scanBtn.setonClickListener(new VIEw.OnClickListener() {            @OverrIDe            public voID onClick(VIEw vIEw) {                if(mBluetoothAdapter.isdiscovering()){                    mBluetoothAdapter.canceldiscovery();                }                mBluetoothAdapter.startdiscovery();            }        });        IntentFilter filter = new IntentFilter();        filter.addAction(BluetoothDevice.ACTION_FOUND);        filter.addAction(BluetoothAdapter.ACTION_disCOVERY_FINISHED);        registerReceiver(mReceiver,filter);    }    @OverrIDe    protected voID onStart() {        super.onStart();        if(!mBluetoothAdapter.isEnabled()){            Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);            startActivityForResult(intent,REQUEST_CODE);        }else {            Toast.makeText(this,"蓝牙已经开启",Toast.LENGTH_LONG).show();        }        IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);        registerReceiver(mReceiver,filter);    }    @OverrIDe    protected voID onActivityResult(int requestCode, int resultCode,                                    @Nullable Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if(requestCode==REQUEST_CODE){            if(resultCode==RESulT_CANCELED){                Toast.makeText(this,"蓝牙已取消",Toast.LENGTH_LONG).show();            }else {                Toast.makeText(this,"蓝牙已经开启",Toast.LENGTH_LONG).show();            }        }    }    @OverrIDe    protected voID onDestroy() {        super.onDestroy();        unregisterReceiver(mReceiver);    }}

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