Android蓝牙打开关闭与搜索-蒲公英云

Android蓝牙打开关闭与搜索

青旅半醒 2022-08-09 09:55 649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

<Button
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="打开蓝牙"
    android:onClick="openBlueTooth"/>
<Button
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="关闭蓝牙"
    android:onClick="closeBlueTooth"/>

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

<Button
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="搜索蓝牙"
    android:onClick="scanBlueTooth"/>

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());
    }
}