android蓝牙的简单用法

最新推荐文章于 2022-07-17 00:04:08 发布

YeasonYu

最新推荐文章于 2022-07-17 00:04:08 发布

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分类专栏： android 文章标签：蓝牙 android

本文链接：https://blog.youkuaiyun.com/qq_26514147/article/details/51924051

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本文介绍了一个简单的Android应用，该应用使用四个按钮实现蓝牙的开关、可见性和已配对设备的列表显示。通过这些功能，用户可以轻松地管理蓝牙设备。

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public class MainActivity extends Activity {

   private Button On,Off,Visible,list;
   private BluetoothAdapter BA;
   private Set<BluetoothDevice>pairedDevices;
   private ListView lv;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      On = (Button)findViewById(R.id.button1);
      Off = (Button)findViewById(R.id.button2);
      Visible = (Button)findViewById(R.id.button3);
      list = (Button)findViewById(R.id.button4);

      lv = (ListView)findViewById(R.id.listView1);

      BA = BluetoothAdapter.getDefaultAdapter();
   }

   public void on(View view){//打开蓝牙
      if (!BA.isEnabled()) {
         Intent turnOn = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
         startActivityForResult(turnOn, 0);
         Toast.makeText(getApplicationContext(),"Turned on" 
         ,Toast.LENGTH_LONG).show();
      }
      else{
         Toast.makeText(getApplicationContext(),"Already on",
         Toast.LENGTH_LONG).show();
         }
   }
   public void list(View view){//显示设备列表
      pairedDevices = BA.getBondedDevices();

      ArrayList list = new ArrayList();
      for(BluetoothDevice bt : pairedDevices)
         list.add(bt.getName());

      Toast.makeText(getApplicationContext(),"Showing Paired Devices",
      Toast.LENGTH_SHORT).show();
      final ArrayAdapter adapter = new ArrayAdapter
      (this,android.R.layout.simple_list_item_1, list);
      lv.setAdapter(adapter);

   }
   public void off(View view){//关闭蓝牙
      BA.disable();
      Toast.makeText(getApplicationContext(),"Turned off" ,
      Toast.LENGTH_LONG).show();
   }
   public void visible(View view){//设置蓝牙可见
      Intent getVisible = new Intent(BluetoothAdapter.
      ACTION_REQUEST_DISCOVERABLE);
      startActivityForResult(getVisible, 0);

   }

}

//必要的权限

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