Android蓝牙打开关闭与搜索

青旅半醒 2022-08-09 09:55 589阅读 0赞

## Android蓝牙 打开 关闭 与 搜索 ##

### 1.获取权限 ###

<manifest ... >
      <uses-permission android:name="android.permission.BLUETOOTH" />
        //普通权限，操作蓝牙时需要
      <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
        //高级权限，配对等操作时需要
    </manifest>

### 2.打开和关闭蓝牙设备 ###

*  创建两个按钮，设置两个单击事件

--------------------

--------------------

public void openBlueTooth(View view){
    //      打开蓝牙（提示对话框）
        Intent discoverableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
        discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);
        startActivity(discoverableIntent);
    
    //        打开蓝牙（静默，无提示）
    //        BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    //        bluetoothAdapter.enable();//需要BLUETOOTH_ADMIN权限
    
    }
    public void closeBlueTooth(View view){
    //      关闭蓝牙
        BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        bluetoothAdapter.disable();
    }

### 3.搜索蓝牙设备 ###

*  新建个按钮

--------------------

*  添加方法

--------------------

public void scanBlueTooth(View view){
        BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        bluetoothAdapter.startDiscovery();
    
    //        返回值是个BluetoothDevice的Set集合
        Set<BluetoothDevice> bluetoothDevices = bluetoothAdapter.getBondedDevices();
        for(BluetoothDevice device : bluetoothDevices){
            System.out.println("Name: " + device.getName());
            System.out.println("Address: " + device.getAddress());
        }
    }