mActivity.runOnUiThread(() -> { if (limitInfo != null) { for (int i = 0; i < limitInfo.size(); i++) { String[] arr = limitInfo.get(i).split(","); Log.e(TAG, "第" + arr[0] + "条路线限行消息：" + arr[1]); } } if (mRoutePlanItems != null) { if (mRoutePlanItems.size() > 0 && mRoutePlanItems.get(0) != null) { initTabView(mLayoutTab0, mRoutePlanItems.get(0)); } if (mRoutePlanItems.size() > 1 && mRoutePlanItems.get(1) != null) { initTabView(mLayoutTab1, mRoutePlanItems.get(1)); mLayoutTab1.setVisibility(View.VISIBLE); } else { mLayoutTab1.setVisibility(View.GONE); } if (mRoutePlanItems.size() > 2 && mRoutePlanItems.get(2) != null) { initTabView(mLayoutTab2, mRoutePlanItems.get(2)); mLayoutTab2.setVisibility(View.VISIBLE); } else { mLayoutTab2.setVisibility(View.GONE); } } mLayoutTab0.setSelected(true); mRouteList.clear(); mRouteList.addAll(mRouteDetails.get(0)); LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity()); mRecyclerView.setLayoutManager(layoutManager); mResultAdapter = new RouteResultAdapter(mRouteList); mRecyclerView.setAdapter(mResultAdapter); // 展示长途信息 if (BaiduNaviManagerFactory.getRouteResultManager().isLongDistance()) { mLDLayout.setVisibility(View.VISIBLE); } else { mLDLayout.setVisibility(View.GONE); } }); 报错 java.lang.IndexOutOfBoundsException: Index: 0, Size: 0

这段代码中可能会出现 java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 异常，这是因为在访问 mRouteDetails 的时候，mRouteDetails 是一个空的列表，而你尝试访问其第一个元素。可以在使用 mRouteDetails 前先判断其是否为空，或者在使用前先对其进行初始化。

相关问题

new Thread(() -> { BNRoutePlanInfos routePlaneInfo = BaiduNaviManagerFactory.getRoutePlanManager().getRoutePlanInfo(); if (routePlaneInfo != null) { // 获取限行数据 limitInfo = routePlaneInfo.getLimitInfo(); //3Tab数据 mRoutePlanItems = routePlaneInfo.getRouteTabInfos(); //路线详情 mRouteDetails = routePlaneInfo.getRouteDetailLists(); } // 获取数据后更新 UI runOnUiThread(() -> { if (limitInfo != null) { for (int i = 0; i < limitInfo.size(); i++) { String[] arr = limitInfo.get(i).split(","); Log.e(TAG, "第" + arr[0] + "条路线限行消息：" + arr[1]); } } if (mRoutePlanItems != null) { if (mRoutePlanItems.size() > 0 && mRoutePlanItems.get(0) != null) { initTabView(mLayoutTab0, mRoutePlanItems.get(0)); } if (mRoutePlanItems.size() > 1 && mRoutePlanItems.get(1) != null) { initTabView(mLayoutTab1, mRoutePlanItems.get(1)); mLayoutTab1.setVisibility(View.VISIBLE); } else { mLayoutTab1.setVisibility(View.GONE); } if (mRoutePlanItems.size() > 2 && mRoutePlanItems.get(2) != null) { initTabView(mLayoutTab2, mRoutePlanItems.get(2)); mLayoutTab2.setVisibility(View.VISIBLE); } else { mLayoutTab2.setVisibility(View.GONE); } } mLayoutTab0.setSelected(true); mRouteList.clear(); mRouteList.addAll(mRouteDetails.get(0)); LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity()); mRecyclerView.setLayoutManager(layoutManager); mResultAdapter = new RouteResultAdapter(mRouteList); mRecyclerView.setAdapter(mResultAdapter); // 展示长途信息 if (BaiduNaviManagerFactory.getRouteResultManager().isLongDistance()) { mLDLayout.setVisibility(View.VISIBLE); } else { mLDLayout.setVisibility(View.GONE); } }); }).start(); 以上代码有问题吗？ 如有不安全性问题，帮我修改一下

以上代码并没有明显的安全问题。但是建议将敏感信息进行加密传输或存储，比如限行数据和路线详情等。此外，建议将线程操作封装成方法，提高代码的可读性和可维护性。具体修改代码如下：

private void getRoutePlanInfo() {
    new Thread(() -> {
        BNRoutePlanInfos routePlaneInfo = BaiduNaviManagerFactory.getRoutePlanManager().getRoutePlanInfo();
        if (routePlaneInfo != null) {
            // 获取限行数据
            limitInfo = routePlaneInfo.getLimitInfo();
            //3Tab数据
            mRoutePlanItems = routePlaneInfo.getRouteTabInfos();
            //路线详情
            mRouteDetails = routePlaneInfo.getRouteDetailLists();
        }
        // 获取数据后更新 UI
        getActivity().runOnUiThread(() -> {
            if (limitInfo != null) {
                for (int i = 0; i < limitInfo.size(); i++) {
                    String[] arr = limitInfo.get(i).split(",");
                    Log.e(TAG, "第" + arr[0] + "条路线限行消息：" + arr[1]);
                }
            }
            if (mRoutePlanItems != null) {
                if (mRoutePlanItems.size() > 0 && mRoutePlanItems.get(0) != null) {
                    initTabView(mLayoutTab0, mRoutePlanItems.get(0));
                }
                if (mRoutePlanItems.size() > 1 && mRoutePlanItems.get(1) != null) {
                    initTabView(mLayoutTab1, mRoutePlanItems.get(1));
                    mLayoutTab1.setVisibility(View.VISIBLE);
                } else {
                    mLayoutTab1.setVisibility(View.GONE);
                }
                if (mRoutePlanItems.size() > 2 && mRoutePlanItems.get(2) != null) {
                    initTabView(mLayoutTab2, mRoutePlanItems.get(2));
                    mLayoutTab2.setVisibility(View.VISIBLE);
                } else {
                    mLayoutTab2.setVisibility(View.GONE);
                }
            }
            mLayoutTab0.setSelected(true);
            mRouteList.clear();
            mRouteList.addAll(mRouteDetails.get(0));
            LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
            mRecyclerView.setLayoutManager(layoutManager);
            mResultAdapter = new RouteResultAdapter(mRouteList);
            mRecyclerView.setAdapter(mResultAdapter);
            // 展示长途信息
            if (BaiduNaviManagerFactory.getRouteResultManager().isLongDistance()) {
                mLDLayout.setVisibility(View.VISIBLE);
            } else {
                mLDLayout.setVisibility(View.GONE);
            }
        });
    }).start();
}

以上方法是在 // 获取数据后更新 UI mActivity.runOnUiThread(() -> { } 中调用的

那么您可以将获取数据后更新UI的代码也放在onAttach()方法之后的runOnUiThread()中执行，这样就可以确保Fragment已经附加到Activity中了，避免出现Fragment未附加到Context的问题。具体代码如下：

private Context mContext;

@Override
public void onAttach(Context context) {
    super.onAttach(context);
    mContext = context;
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_route_result, container, false);
    LinearLayout tab1 = view.findViewById(R.id.tab1);
    LinearLayout tab2 = view.findViewById(R.id.tab2);
    initTabView(tab1, mBNRoutePlanList.get(0));
    initTabView(tab2, mBNRoutePlanList.get(1));
    return view;
}

private void initTabView(LinearLayout layoutTab, BNRoutePlanItem bnRoutePlanItem) {
    TextView prefer = layoutTab.findViewById(R.id.prefer);
    prefer.setText(bnRoutePlanItem.getPusLabelName());
    TextView time = layoutTab.findViewById(R.id.time);
    time.setText(getString(R.string.route_result_pass_time, (int) bnRoutePlanItem.getPassTime() / 60));
    TextView distance = layoutTab.findViewById(R.id.distance);
    distance.setText(getString(R.string.route_result_distance_text, (int) bnRoutePlanItem.getLength() / 1000));
    TextView trafficLight = layoutTab.findViewById(R.id.traffic_light);
    trafficLight.setText(String.valueOf(bnRoutePlanItem.getLights()));
}

private void updateUI() {
    mActivity.runOnUiThread(() -> {
        LinearLayout tab1 = getView().findViewById(R.id.tab1);
        LinearLayout tab2 = getView().findViewById(R.id.tab2);
        initTabView(tab1, mBNRoutePlanList.get(0));
        initTabView(tab2, mBNRoutePlanList.get(1));
    });
}

这样，即使在获取数据后更新UI时出现了Fragment未附加到Context的问题，也可以保证在Fragment附加到Activity后再更新UI了，避免了出现异常。