精简的android蓝牙搜索代码

编者：李国帅

背景原因:

排除无关代码，仅仅剩下蓝牙搜索部分代码。

所需资源：

Android ，bluetooth

activity:

public class SearchBluetoothActivity extends AppCompatActivity {
    BluetoothAdapter mBluetoothAdapter;
    ArrayAdapter<String> mArrayAdapter;

    ListView list;//显示列表

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_search_bluetooth);

        list = findViewById(R.id.listView1);
        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        mArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1);
        if (mBluetoothAdapter.isEnabled()) {

            IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
            registerReceiver(mReceiver, filter);

            mArrayAdapter.clear();
            mBluetoothAdapter.startDiscovery();// 开始扫描
        }
    }

    final BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (BluetoothDevice.ACTION_FOUND.equals(action)) {
                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                mArrayAdapter.add(device.getName() + ":" + device.getAddress());
            }
            list.setAdapter(mArrayAdapter);
        }
    };

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(mReceiver);
        mBluetoothAdapter.cancelDiscovery();
    }
}

布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context=".SearchBluetoothActivity">

    <ListView
        android:id="@+id/listView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</LinearLayout>