android 实现ble蓝牙自动配对连接-Toy模板网

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蓝牙自动配对，即搜索到其它蓝牙设备之后直接进行配对，不需要弹出配对确认框或者密钥输入框。

本文章用来连接蓝牙设备ai-thinker，如果你要连接其他蓝牙设备，注意修改相关名字以及修改设备初试pin值。

将Demo安装在Android手机上，点击按钮，可以实现与目标蓝牙设备的自动配对。

以下是涉及的代码，两个类一个activity：

android 实现ble蓝牙自动配对连接

实现是activity_main：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/btn_autopair"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

ClsUtils：

package com.example.myapplication;
import java.lang.reflect.Field;
import java.lang.reflect.Method;

import android.bluetooth.BluetoothDevice;
import android.util.Log;
public class ClsUtils{

    /**
     * 与设备配对 参考源码：platform/packages/apps/Settings.git
     * /Settings/src/com/android/settings/bluetooth/CachedBluetoothDevice.java
     */
    static public boolean createBond(Class btClass, BluetoothDevice btDevice)
            throws Exception
    {
        Method createBondMethod = btClass.getMethod("createBond");
        Boolean returnValue = (Boolean) createBondMethod.invoke(btDevice);
        return returnValue.booleanValue();
    }

    /**
     * 与设备解除配对 参考源码：platform/packages/apps/Settings.git
     * /Settings/src/com/android/settings/bluetooth/CachedBluetoothDevice.java
     */
    static public boolean removeBond(Class btClass, BluetoothDevice btDevice)
            throws Exception
    {
        Method removeBondMethod = btClass.getMethod("removeBond");
        Boolean returnValue = (Boolean) removeBondMethod.invoke(btDevice);
        return returnValue.booleanValue();
    }

    static public boolean setPin(Class btClass, BluetoothDevice btDevice,
                                 String str) throws Exception
    {
        try
        {
            Method removeBondMethod = btClass.getDeclaredMethod("setPin",
                    new Class[]
                            {byte[].class});
            Boolean returnValue = (Boolean) removeBondMethod.invoke(btDevice,
                    new Object[]
                            {str.getBytes()});
            Log.e("returnValue", "" + returnValue);
        }
        catch (SecurityException e)
        {
            // throw new RuntimeException(e.getMessage());
            e.printStackTrace();
        }
        catch (IllegalArgumentException e)
        {
            // throw new RuntimeException(e.getMessage());
            e.printStackTrace();
        }
        catch (Exception e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return true;

    }

    // 取消用户输入
    static public boolean cancelPairingUserInput(Class btClass,
                                                 BluetoothDevice device)

            throws Exception
    {
        Method createBondMethod = btClass.getMethod("cancelPairingUserInput");
        // cancelBondProcess()
        Boolean returnValue = (Boolean) createBondMethod.invoke(device);
        return returnValue.booleanValue();
    }

    // 取消配对
    static public boolean cancelBondProcess(Class btClass,
                                            BluetoothDevice device)

            throws Exception
    {
        Method createBondMethod = btClass.getMethod("cancelBondProcess");
        Boolean returnValue = (Boolean) createBondMethod.invoke(device);
        return returnValue.booleanValue();
    }

    /**
     *
     * @param clsShow
     */
    static public void printAllInform(Class clsShow)
    {
        try
        {
            // 取得所有方法
            Method[] hideMethod = clsShow.getMethods();
            int i = 0;
            for (; i < hideMethod.length; i++)
            {
                Log.e("method name", hideMethod[i].getName() + ";and the i is:"
                        + i);
            }
            // 取得所有常量
            Field[] allFields = clsShow.getFields();
            for (i = 0; i < allFields.length; i++)
            {
                Log.e("Field name", allFields[i].getName());
            }
        }
        catch (SecurityException e)
        {
            // throw new RuntimeException(e.getMessage());
            e.printStackTrace();
        }
        catch (IllegalArgumentException e)
        {
            // throw new RuntimeException(e.getMessage());
            e.printStackTrace();
        }
        catch (Exception e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    //确认配对

    static public void setPairingConfirmation(Class<?> btClass,BluetoothDevice device,boolean isConfirm)throws Exception
    {
        Method setPairingConfirmation = btClass.getDeclaredMethod("setPairingConfirmation",boolean.class);
        setPairingConfirmation.invoke(device,isConfirm);
    }
}

MainActivity：

package com.example.myapplication;

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

public class MainActivity extends Activity implements OnClickListener{
    /** Called when the activity is first created. */
    private static BluetoothDevice remoteDevice=null;
    private Button btn_autopair=null;
    final static String ACTION_BLUETOOTHBC="android.bluetooth.device.action.PAIRING_REQUEST";
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn_autopair=(Button)findViewById(R.id.btn_autopair);
        btn_autopair.setOnClickListener(this);
    }
    public static boolean pair(String strAddr, String strPsw)
    {
        boolean result = false;
        //蓝牙设备适配器
        BluetoothAdapter bluetoothAdapter = BluetoothAdapter
                .getDefaultAdapter();
        //取消发现当前设备的过程
        bluetoothAdapter.cancelDiscovery();
        if (!bluetoothAdapter.isEnabled())
        {
            bluetoothAdapter.enable();
        }
        if (!BluetoothAdapter.checkBluetoothAddress(strAddr))
        { // 检查蓝牙地址是否有效
            Log.d("mylog", "devAdd un effient!");
        }
        //由蓝牙设备地址获得另一蓝牙设备对象
        BluetoothDevice device = bluetoothAdapter.getRemoteDevice(strAddr);
        if (device.getBondState() != BluetoothDevice.BOND_BONDED)
        {
            try
            {
                Log.d("mylog", "NOT BOND_BONDED");
                ClsUtils.setPin(device.getClass(), device, strPsw); // 手机和蓝牙采集器配对
                ClsUtils.createBond(device.getClass(), device);
                //    ClsUtils.cancelPairingUserInput(device.getClass(), device);
                remoteDevice = device; // 配对完毕就把这个设备对象传给全局的remoteDevice
                result = true;
            }
            catch (Exception e)
            {
                // TODO Auto-generated catch block
                Log.d("mylog", "setPiN failed!");
                e.printStackTrace();
            } //

        }
        else
        {
            Log.d("mylog", "HAS BOND_BONDED");
            try
            {
                //ClsUtils这个类的的以下静态方法都是通过反射机制得到需要的方法
                ClsUtils.createBond(device.getClass(), device);//创建绑定
                ClsUtils.setPin(device.getClass(), device, strPsw); // 手机和蓝牙采集器配对
                ClsUtils.createBond(device.getClass(), device);
                //    ClsUtils.cancelPairingUserInput(device.getClass(), device);
                remoteDevice = device; // 如果绑定成功，就直接把这个设备对象传给全局的remoteDevice
                result = true;
            }
            catch (Exception e)
            {
                // TODO Auto-generated catch block
                Log.d("mylog", "setPiN failed!");
                e.printStackTrace();
            }
        }
        return result;
    }
    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        switch (v.getId()) {
            case R.id.btn_autopair:
                if (pair("94:C9:60:1E:00:04", "123456")) {//pair的第一个参数是要配对的蓝牙地址，第二个参数是配对时预先设置的密钥

                    Log.i("aaron", remoteDevice.getAddress());
                }
                break;

            default:
                break;
        }
    }
}

最后别忘了加上权限哦 AndroidManifest.xml：

（权限太多了忘记是哪个了。）

   <!-- 使用蓝牙的权限 -->
    <uses-permission android:name="android.permission.BLUETOOTH" /> <!-- 扫描蓝牙设备或者操作蓝牙设置 -->
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" /> <!-- 模糊定位权限，仅作用于6.0+ -->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <!-- 精准定位权限，仅作用于6.0+ -->
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
    <uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="21" />

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

最后我发现这样子运行还是有pin码的弹窗如以下：

android 实现ble蓝牙自动配对连接