Question

我正在开发一个应用程序，当用户显示应用程序的某个片段时，我将在该应用程序中不断搜索范围内的可用信标。为了做到这一点，我创建了一个Runnable，我在其中调用一个开始扫描的方法。扫描结果使用Handler发送到Message。我遇到的问题是我不知道如何调用一种可以停止扫描的方法。我的代码：

private class BleScanRunnable implements Runnable, BleScanCallback {

        private final BleScanCallback mBleScanCallback = this;
        private BleScan mBleScan =
                BleScanFactory.getFactory(BleFragment.this.getActivity())
                        .createBleScan();

        @Override
        public void onScanResult(BluetoothDevice device, int rssi, byte[] scanRecord) {
            Message msg = mHandler.obtainMessage();
            Bundle bundle = new Bundle();
            bundle.putParcelable(ARG_BLUETOOTH_DEVICE, device);
            bundle.putInt(ARG_RSSI, rssi);
            bundle.putByteArray(ARG_SCAN_RECORD, scanRecord);
            msg.setData(bundle);
            mHandler.sendMessage(msg);
        }

        @Override
        public void run() {
            mBleScan.startBleScan(mBleScanCallback);
        }

    }

我如何开始和停止runnable：

    private void startBleRunnable() {
        ExecutorService threadPoolExecutor = Executors.newSingleThreadExecutor();
        BleScanRunnable bleScanRunnable = new BleScanRunnable();
        mBleScanRunnableFuture = threadPoolExecutor.submit(bleScanRunnable);
    }

    private void stopBleRunnable() {
        mBleScanRunnableFuture.cancel(true);
    }

问题是如何不仅停止Runnable，还可以在mBleScan.stopBleScan()

的onPause()方法中调用BleFragment方法

添加此类方法是否可以：

public void stopBleScan() {
    mBleScan.stopBleScan();
}

到BleScanRunnable并从onPause()调用它，如下所示：

mBleScanRunnable.stopBleScan();

Answer 1

我扫描了信标并以稍微不同的方式停止扫描。请在此处查看我的示例代码：

    public class MainActivity extends AppCompatActivity implements ProximityManager.ProximityListener{
        @Override
            protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_patient_summary_info);
                ButterKnife.bind(this);

                setSupportActionBar(toolbar);
                KontaktSDK.initialize(KONTAKT_API_KEY)
                        .setDebugLoggingEnabled(BuildConfig.DEBUG)
                        .setLogLevelEnabled(LogLevel.DEBUG, false);// set true if debug log needed.

                mProximityManager = new KontaktProximityManager(this);
                mAppPreferences = AppUtil.getAppPreferences(this);
                mScannedBeaconsList = new ArrayList<>();
                mDotor = new Gson().fromJson(mAppPreferences.getString(Constants.SETTINGS_OBJ_DOCTOR, ""), Doctor.class);
                RealmConfiguration realmConfig = new RealmConfiguration.Builder(this).build();
                mRealm = Realm.getInstance(realmConfig);
                getPatientList();


            }

@Override
    protected void onStart() {
        super.onStart();
        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            checkPermissionAndStart();
        }else {
            startBluetoothIfNotStarted();
            startScan();
        }
    }

        }

这是我开始扫描代码：

private void startScan() {
        mProximityManager.initializeScan(getScanContext(), new OnServiceReadyListener() {
            @Override
            public void onServiceReady() {
                mProximityManager.attachListener(PatientSummaryInfoActivity.this);
            }

            @Override
            public void onConnectionFailure() {
                AppUtil.writeLog(TAG, "Beacon connection lost.");
            }
        });
    }

以下是我停止扫描的方式：

@Override
    protected void onStop() {
        super.onStop();
        mProximityManager.detachListener(this);
        mProximityManager.disconnect();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mRealm.close();
        mProximityManager = null;
    }

停止BLE扫描在runnable中启动

1 个答案: