在Android应用程序中实现后台BLE广告需要以下步骤：

1.在AndroidManifest.xml文件中声明必要的权限和服务

2.实现MyAdvertiseService类并继承android.app.Service类

public class MyAdvertiseService extends Service { // 该服务的广告设置和开关控制的变量 private BluetoothLeAdvertiser advertiser; private AdvertiseSettings settings; private AdvertiseData data; private boolean isAdvertising;

// 在MyAdvertiseService类中实例化变量 @Override public void onCreate() { BluetoothManager bluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE); BluetoothAdapter bluetoothAdapter = bluetoothManager.getAdapter();

// 获取BLE广告实例，并设置广告对象和开关控制变量
advertiser = bluetoothAdapter.getBluetoothLeAdvertiser();
settings = new AdvertiseSettings.Builder()
        .setAdvertiseMode(AdvertiseSettings.ADVERTISE_MODE_BALANCED)
        .setConnectable(true)
        .setTimeout(0)
        .setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_HIGH)
        .build();
data = new AdvertiseData.Builder()
        .setIncludeDeviceName(true)
        .setIncludeTxPowerLevel(true)
        .addServiceUuid(new ParcelUuid(UUID.fromString("00007FFF-0000-1000-8000-00805F9B34FB")))
        .build();
isAdvertising = false;

}

// 在MyAdvertiseService类中实现启动和停止广告的方法 @Override public int onStartCommand(Intent intent, int flags, int startId) { if (isAdvertising) { stopAdvertising(); } else { startAdvertising(); } return START_STICKY; }

// 启动广告 private void startAdvertising() { advertiser.startAdvertising(settings, data, advertisingCallback); isAdvertising = true; }

// 停止广告 private void stopAdvertising() { advertiser.stopAdvertising(advertisingCallback); isAdvertising = false; }

// 广告回调方法，用于处理广告操作结果 private AdvertiseCallback advertisingCallback = new AdvertiseCallback() { @Override public void onStartSuccess(AdvertiseSettings settingsInEffect) { super.onStartSuccess(settingsInEffect); Log.i(TAG, "Advertise started successfully."); }

@Override
public void onStartFailure(int errorCode) {
    super.onStartFailure(errorCode);
    Log.e(TAG, "Advertise failed to start: