android做一个打开和关闭蓝牙的动作-蒲公英云

android做一个打开和关闭蓝牙的动作

直接示例ba,安卓SDK内置有蓝牙适配器,可以直接调用的，我是用三星s10,Android12手机安装的,完全可以,做了个打开和关闭的点击事件。
1.清单文件里要注册一些蓝牙权限

<!-- 蓝牙权限 -->
    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
    <uses-permission android:name="android.permission.BLUETOOTH" />
    <uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />
    <uses-permission android:name="BLUETOOTH_CONNECT" />
    <!-- Required if your app derives physical location from Bluetooth
        scan results. -->
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION" />

xml页面:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".bluetooth.BluetoothFragment"
    android:orientation="horizontal">
    <!-- TODO: Update blank fragment layout -->
    <TextView
        android:layout_weight="1"
        android:id="@+id/tv_open"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:textSize="30sp"
        android:text="开启蓝牙" />
    <TextView
        android:layout_weight="1"
        android:id="@+id/tv_close"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="关闭蓝牙"
        android:textSize="30sp"/>
</LinearLayout>

java代码里:

public class BluetoothFragment extends Fragment {
    //声明绑定对象
    FragmentBluetoothBinding binding;
    //1.全局静态常量定义
    public static final int REQUEST_ENABLE_BT = 1;
    //2.全局变量中定义蓝牙,拿到适配器
    BluetoothAdapter mBluetoothAdapter;
    private List<String> mPermissionList = new ArrayList<>();
    public BluetoothFragment() {
        // Required empty public constructor
    }
    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @param param1 Parameter 1.
     * @param param2 Parameter 2.
     * @return A new instance of fragment BluetoothFragment.
     */
    // TODO: Rename and change types and number of parameters
    public static BluetoothFragment newInstance(String param1, String param2) {
        BluetoothFragment fragment = new BluetoothFragment();
        return fragment;
    }
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
        }
    }
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        /**
         * 使用binding视图绑定功能
         * 通过视图绑定功能,可以更轻松地编写可与视图交互的代码。在模块中启动视图绑定之后,
         * 系统会为该模块中的每个xml布局文件生成一个绑定类。
         * 绑定类的实例包含在相应布局中具有ID的所有视图的直接引用
         */
        binding = FragmentBluetoothBinding.inflate(inflater, container, false);
        View view = binding.getRoot();
        //todo 3.初始化蓝牙
        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        initPermission();
        openBluetooth();
        closeBluetooth();
        return view;
    }
    //打开蓝牙
    void openBluetooth() {
        binding.tvOpen.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(getActivity(),"打开蓝牙了，小7",Toast.LENGTH_LONG).show();
                mBluetoothAdapter.enable();
            }
        });
    }
    //关闭蓝牙
    void closeBluetooth() {
        binding.tvClose.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(getActivity(),"小飞新关闭蓝牙了",Toast.LENGTH_LONG).show();
                mBluetoothAdapter.disable();
            }
        });
    }
    // todo 蓝牙动态申请权限
    private void initPermission(){
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.S){
            // Android 版本大于等于 Android12 时
            // 只包括蓝牙这部分的权限，其余的需要什么权限自己添加
            mPermissionList.add(Manifest.permission.BLUETOOTH_SCAN);
            mPermissionList.add(Manifest.permission.BLUETOOTH_ADVERTISE);
            mPermissionList.add(Manifest.permission.BLUETOOTH_CONNECT);
        } else {
            // Android 版本小于 Android12 及以下版本
            mPermissionList.add(Manifest.permission.ACCESS_COARSE_LOCATION);
            mPermissionList.add(Manifest.permission.ACCESS_FINE_LOCATION);
        }
        if(mPermissionList.size() > 0){
            ActivityCompat.requestPermissions(getActivity(),mPermissionList.toArray(new String[0]),1001);
        }
    }
}