前言：蓝牙聊天App设计全部有三篇文章（一、UI界面设计，二、蓝牙搜索配对连接实现，三、蓝牙连接聊天），这篇文章是：二、蓝牙搜索配对连接实现。
课程1：Android Studio小白安装教程，以及第一个Android项目案例“Hello World”的调试运行
课程2：蓝牙聊天App设计1：Android Studio制作蓝牙聊天通讯软件（UI界面设计）
课程3：蓝牙聊天App设计2：Android Studio制作蓝牙聊天通讯软件（蓝牙搜索）
课程4：蓝牙聊天App设计3：Android Studio制作蓝牙聊天通讯软件（完结，蓝牙连接聊天，结合生活情景进行蓝牙通信的通俗讲解，以及代码功能实现，内容详细，讲解通俗易懂）
涉及文件：
在java目录下新建一个包“BluetoothPackage”，并在该包内新建两个新文件：“Constant.java”和“BluetoothController.java”，如图所示：
一、在AndroidManifest.xml中添加依赖：
<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-feature android:name="android.hardware.bluetooth_le" android:required="true" />
二、新建文件Constant.java，用来预先定义一些下面可能需要用到的常量，完整代码如下：
package com.example.wyb.btw3.connect;
/**
* Created by WYB on 2023/4/24.
*/
public class Constant {
public static final String CONNECTTION_UUID = "00001101-0000-1000-8000-00805F9B34FB";
/**
* 开始监听
*/
public static final int MSG_START_LISTENING = 1;
/**
* 结束监听
*/
public static final int MSG_FINISH_LISTENING = 2;
/**
* 有客户端连接
*/
public static final int MSG_GOT_A_CLINET = 3;
/**
* 连接到服务器
*/
public static final int MSG_CONNECTED_TO_SERVER = 4;
/**
* 获取到数据
*/
public static final int MSG_GOT_DATA = 5;
/**
* 出错
*/
public static final int MSG_ERROR = -1;
}
三、新建文件BlueToothController .java，完整代码如下：
package com.example.wyb.btw3;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.Intent;
import java.util.ArrayList;
import java.util.List;
/**
* Created by WYB on 2023/4/24.
*/
public class BlueToothController {
private BluetoothAdapter mAdapter;
public BlueToothController(){
mAdapter = BluetoothAdapter.getDefaultAdapter();
}
/*
打开蓝牙设备
*/
public void turnOnBlueTooth(Activity activity, int requestCode){
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
activity.startActivityForResult(intent,requestCode);
}
/*
查找未绑定的蓝牙设备
*/
public void findDevice(){
assert (mAdapter!=null);
mAdapter.startDiscovery();
}
/*
查看已绑定的蓝牙设备
*/
public List<BluetoothDevice> getBondedDeviceList(){
return new ArrayList<>(mAdapter.getBondedDevices());
}
}
四、MainActivity .java完整代码如下：
package com.example.wyb.bluetoothchatui;
import android.Manifest;
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.content.pm.PackageManager;
import android.os.Build;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
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.Button;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
import BluetoothPackage.BluetoothController;
import MyClass.DeviceAdapter;
import MyClass.DeviceClass;
public class MainActivity extends AppCompatActivity {
private DeviceAdapter mAdapter1,mAdapter2;
private List<DeviceClass> mbondDeviceList = new ArrayList<>();//搜索到的所有已绑定设备保存为列表
private List<DeviceClass> mfindDeviceList = new ArrayList<>();//搜索到的所有未绑定设备保存为列表
private BluetoothController mbluetoothController = new BluetoothController();
private Toast mToast;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Init_Bluetooth();//开启蓝牙相关权限
init_Filter();//初始化广播并打开
Init_listView();//初始化设备列表
show_bondDeviceList();//搜索展示已经绑定的蓝牙设备
}
//初始化蓝牙权限
private void Init_Bluetooth(){
//开启蓝牙位置共享
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (this.checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, 1);
}
}
mbluetoothController.enableVisibily(this);//让其他蓝牙看得到我
mbluetoothController.turnOnBlueTooth(this,0);//打开蓝牙
}
//初始化列表，适配器的加载
public void Init_listView(){
mAdapter1 = new DeviceAdapter(MainActivity.this, R.layout.device_item, mbondDeviceList);
ListView listView1 = (ListView)findViewById(R.id.listview1);
listView1.setAdapter(mAdapter1);
mAdapter1.notifyDataSetChanged();
//listView1.setOnItemClickListener(toMainActivity2);//设备点击事件，点击设备名称后执行toMainActivity2
mAdapter2 = new DeviceAdapter(MainActivity.this, R.layout.device_item, mfindDeviceList);
ListView listView2 = (ListView)findViewById(R.id.listview2);
listView2.setAdapter(mAdapter2);
mAdapter2.notifyDataSetChanged();
}
//开启广播
private void init_Filter(){
IntentFilter filter = new IntentFilter();
//开始查找
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
//结束查找
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
//查找设备
filter.addAction(BluetoothDevice.ACTION_FOUND);
//设备扫描模式改变
filter.addAction(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED);
//绑定状态
filter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
registerReceiver(receiver, filter);
}
//广播内容
private BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if(BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)){
setSupportProgressBarIndeterminateVisibility(true);
change_Button_Text("搜索中...","DISABLE");
mfindDeviceList.clear();
mAdapter2.notifyDataSetChanged();
}
else if(BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)){
setProgressBarIndeterminateVisibility(false);
change_Button_Text("搜索设备","ENABLE");
}
//查找设备
else if(BluetoothDevice.ACTION_FOUND.equals(action)){
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
change_Button_Text("搜索中...","DISABLE");
//查找到一个设备就添加到列表类中
mfindDeviceList.add(new DeviceClass(device.getName(),device.getAddress()));
mAdapter2.notifyDataSetChanged();//刷新列表适配器，将内容显示出来
}
else if(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED.equals(action)){
int scanMode = intent.getIntExtra(BluetoothAdapter.EXTRA_SCAN_MODE,0);
if (scanMode == BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE){
setProgressBarIndeterminateVisibility(true);
}
else {
setProgressBarIndeterminateVisibility(false);
}
}
else if(BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {
BluetoothDevice remoteDecive = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if(remoteDecive == null){
return;
}
int status = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, 0);
if(status == BluetoothDevice.BOND_BONDED) {
showToast("已绑定" + remoteDecive.getName());
} else if(status == BluetoothDevice.BOND_BONDING) {
showToast("正在绑定" + remoteDecive.getName());
} else if(status == BluetoothDevice.BOND_NONE) {
showToast("未绑定" + remoteDecive.getName());
}
}
}
};
//点击开始查找蓝牙设备
public View findDevice(View view){
mbluetoothController.findDevice();
return view;
}
//查找已绑定的蓝牙设备
private void show_bondDeviceList(){
mbondDeviceList.clear();
List<BluetoothDevice> bondDevices = mbluetoothController.getBondedDeviceList();//查找已绑定设备
for(int i=0;i<bondDevices.size();i++){
mbondDeviceList.add(new DeviceClass(bondDevices.get(i).getName(),bondDevices.get(i).getAddress()));
}
mAdapter1.notifyDataSetChanged();
}
//点击按键搜索后按键的变化
private void change_Button_Text(String text,String state){
Button button = (Button)findViewById(R.id.button1);
if("ENABLE".equals(state)){
button.setEnabled(true);
button.getBackground().setAlpha(255); //0~255 之间任意调整
button.setTextColor(ContextCompat.getColor(this, R.color.black));
}
else {
button.setEnabled(false);
button.getBackground().setAlpha(150); //0~255 之间任意调整
button.setTextColor(ContextCompat.getColor(this, R.color.colorAccent));
}
button.setText(text);
}
//点击设备后执行的函数
private AdapterView.OnItemClickListener toMainActivity2 =new AdapterView.OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l){
Intent intent = new Intent(MainActivity.this,Main2Activity.class);
startActivity(intent);
}
};
//设置toast的标准格式
private void showToast(String text){
if(mToast == null){
mToast = Toast.makeText(this, text,Toast.LENGTH_SHORT);
mToast.show();
}
else {
mToast.setText(text);
mToast.show();
}
}
}
五、效果图
六、完整项目分享
项目链接：https://pan.baidu.com/s/1z8tW3aA7a5knKxiwlE3BFw 提取码：3d53
七、蓝牙聊天功能实现
可以看课程蓝牙聊天App设计3：Android Studio制作蓝牙聊天通讯软件（完结，蓝牙连接聊天，结合生活情景进行蓝牙通信的通俗讲解，以及代码功能实现，内容详细，讲解通俗易懂）