要进行Android BLE扫描并使用PendingIntent来处理扫描结果，可以按照以下步骤进行操作：

1. 在AndroidManifest.xml文件中添加必要的权限和服务声明：

2. 创建一个扫描服务ScanService类，该类继承自Service，并实现BLE扫描的逻辑：

public class ScanService extends Service {
    private BluetoothAdapter mBluetoothAdapter;
    private BluetoothLeScanner mBluetoothLeScanner;
    private PendingIntent mPendingIntent;

    private final BroadcastReceiver mScanReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(intent.getAction())) {
                int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.STATE_OFF);
                if (state == BluetoothAdapter.STATE_ON) {
                    startScan();
                }
            }
        }
    };

    @Override
    public void onCreate() {
        super.onCreate();
        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        mBluetoothLeScanner = mBluetoothAdapter.getBluetoothLeScanner();
        IntentFilter filter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
        registerReceiver(mScanReceiver, filter);
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        mPendingIntent = intent.getParcelableExtra("pendingIntent");
        if (mBluetoothAdapter.isEnabled()) {
            startScan();
        }
        return START_STICKY;
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        unregisterReceiver(mScanReceiver);
        stopScan();
    }

    private void startScan() {
        ScanSettings settings = new ScanSettings.Builder()
                .setScanMode(ScanSettings.SCAN_MODE_LOW_POWER)
                .build();
        ScanFilter filter = new ScanFilter.Builder()
                .build();
        List filters = new ArrayList<>();
        filters.add(filter);
        mBluetoothLeScanner.startScan(filters, settings, mScanCallback);
    }

    private void stopScan() {
        mBluetoothLeScanner.stopScan(mScanCallback);
    }

    private ScanCallback mScanCallback = new ScanCallback() {
        @Override
        public void onScanResult(int callbackType, ScanResult result) {
            super.onScanResult(callbackType, result);
            // 处理扫描结果
            if (mPendingIntent != null) {
                // 将扫描结果发送给PendingIntent
                try {
                    Intent intent = new Intent();
                    intent.putExtra("deviceName", result.getDevice().getName());
                    mPendingIntent.send(ScanService.this, 0, intent);
                } catch (PendingIntent.CanceledException e) {
                    e.printStackTrace();
                }
            }
        }
    };

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}

3. 在需要进行BLE扫描的地方，创建一个PendingIntent，并将其传递给ScanService启动扫描：

private void startBLEScan() {
    Intent intent = new Intent(this, ScanService.class);
    PendingIntent pendingIntent = PendingIntent.getService(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
    intent.putExtra("pendingIntent", pendingIntent);
    startService(intent);
}

4. 在接收扫描结果的地方，创建一个BroadcastReceiver来接收PendingIntent发送的结果：

private final BroadcastReceiver mScanResultReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String deviceName = intent.getStringExtra("deviceName");
        // 处理扫描结果
    }
};

5. 在需要接收扫描结果的地方注册BroadcastReceiver，并在不需要时进行注销：

@Override
protected void onResume() {
    super.onResume();
    IntentFilter filter = new IntentFilter();
    filter.addAction(getPackageName() + ".SCAN_RESULT_ACTION");
    registerReceiver(mScanResultReceiver, filter);
}

@Override
protected void onPause() {
    super.onPause();
    unregisterReceiver(mScanResultReceiver);
}

这样就可以通过PendingIntent来处理BLE扫描的结果了。当扫描到设备时，ScanService会将结果发送给PendingIntent，然后通过BroadcastReceiver接收结果并进行处理。