安卓获取BLE蓝牙列表完整用例

以下是一个简单的 Android 示例代码，用于获取 BLE 蓝牙设备列表：

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothManager;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    private BluetoothAdapter mBluetoothAdapter;
    private ArrayList<String> mDeviceList = new ArrayList<>();
    private ListView mListView;
    private ArrayAdapter<String> mAdapter;
    private Handler mHandler = new Handler();

    private BluetoothAdapter.LeScanCallback mLeScanCallback = new BluetoothAdapter.LeScanCallback() {
        @Override
        public void onLeScan(final BluetoothDevice device, final int rssi, final byte[] scanRecord) {
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    if (!mDeviceList.contains(device.getName() + "\n" + device.getAddress())) {
                        mDeviceList.add(device.getName() + "\n" + device.getAddress());
                        mAdapter.notifyDataSetChanged();
                    }
                }
            });
        }
    };

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

        mListView = findViewById(R.id.listView);
        mAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, mDeviceList);
        mListView.setAdapter(mAdapter);

        // 获取 BluetoothAdapter 对象
        final BluetoothManager bluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
        mBluetoothAdapter = bluetoothManager.getAdapter();

        // 检查设备是否支持 BLE
        if (!getPackageManager().hasSystemFeature(android.content.pm.PackageManager.FEATURE_BLUETOOTH_LE)) {
            Log.e("MainActivity", "BLE not supported");
            finish();
        }

        // 开启 Bluetooth 以及 BLE
        if (!mBluetoothAdapter.isEnabled()) {
            mBluetoothAdapter.enable();
        }

        // 开始扫描 BLE 设备
        mHandler.postDelayed(new Runnable() {
            @Override
            public void run() {
                mBluetoothAdapter.stopLeScan(mLeScanCallback);
            }
        }, 10000);
        mBluetoothAdapter.startLeScan(mLeScanCallback);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        // 停止扫描 BLE 设备
        mBluetoothAdapter.stopLeScan(mLeScanCallback);
    }
}

这个示例代码实现了以下操作：

1. 获取 BluetoothAdapter 对象

2. 检查设备是否支持 BLE

3. 开启 Bluetooth 以及 BLE

4. 创建 BluetoothAdapter.LeScanCallback 对象

5. 开始扫描 BLE 设备

6. 在 BluetoothAdapter.LeScanCallback 中处理扫描结果

7. 在列表中显示扫描到的设备名称和地址

8. 停止扫描 BLE 设备

注意：在使用 BLE API 时，必须先获取适当的权限和声明。