刚接触安卓开发，应用是简单的结构，activity中嵌套fragment，当fragment中的条件按钮改变时，进行重新请求数据和列表展示：
代码如下（页面进入后进行一次初始条件查询）：
public class SoulPostStationFragment extends PagingFragment<TBKnowledgeCourseVo> implements AdapterView.OnItemClickListener {
private FragmentManager fManager;
private TabLayout tab_layout_time;
private String studentId;
//查询条件
private String grade = "0006";
private String course = "0001";
private String near2 = "0003";
public SoulPostStationFragment(FragmentManager fManager) {
this.fManager = fManager;
}
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_soul_post_station,container,false);
return view;
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
studentId = SharedPreferencesUtil.getString(getContext(), "studentId", null);
listView = (XListView) view.findViewById(R.id.knowledgeCourseList2);
listView.setOnItemClickListener(this);
listView.setPullLoadEnable(true);
listView.setPullRefreshEnable(true);
listView.setXListViewListener(this);
//initDatas();
tab_layout_time = view.findViewById(R.id.tab_layout_time);
tab_layout_time.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
//选中某个tab
LogUtils.e("=1=","onTabSelected1：" + tab);
pageIndex = 1;
near2 = tab.getText().toString();
if("近一个月".equals(near2)){
near2 = "0001";
}else if("近三个月".equals(near2)) {
near2 = "0002";
}else if("近半年".equals(near2)) {
near2 = "0003";
} else if("更多".equals(near2)) {
near2 = "";
}
if (alllist != null){
alllist.clear();
}
initDatas();
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
//当tab从选择到未选择
LogUtils.e("=1=","onTabUnselected1：" + tab);
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
//已经选中tab后的重复点击tab
LogUtils.e("=1=","onTabReselected1：" + tab);
pageIndex = 1;
near2 = tab.getText().toString();
if("近一个月".equals(near2)){
near2 = "0001";
}else if("近三个月".equals(near2)) {
near2 = "0002";
}else if("近半年".equals(near2)) {
near2 = "0003";
} else if("更多".equals(near2)) {
near2 = "";
}
if (alllist != null){
alllist.clear();
}
initDatas();
}
});
tab_layout_time.getTabAt(2).select();
}
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
FragmentTransaction fTransaction = fManager.beginTransaction();
SoulPostStationDetailFragment soulPostStationDetailFragment = new SoulPostStationDetailFragment(fManager);
LogUtils.e("=1=","list.size :" + alllist.size());
LogUtils.e("=1=","position :" + position);
Bundle bd = new Bundle();
bd.putString("id", alllist.get(position-1).getId());
bd.putString("fileUrl",alllist.get(position-1).getFileUrl());
LogUtils.e("=1=","onItemClick id：" + bd.get("id"));
LogUtils.e("=1=","onItemClick fileUrl：" + bd.get("fileUrl"));
soulPostStationDetailFragment.setArguments(bd);
//加上Fragment替换动画
fTransaction.setCustomAnimations(R.anim.fragment_slide_left_enter, R.anim.fragment_slide_left_exit);
fTransaction.replace(R.id.centerFragment, soulPostStationDetailFragment);
//调用addToBackStack将Fragment添加到栈中
fTransaction.addToBackStack(null);
fTransaction.commit();
}
protected void initDatas() {
LogUtils.e("=1=","initDatas：");
if (NetUtils.isConnected(this.getContext())) {
new queryKnowledgeCourseList().execute();
} else {
//NoNetAdapter();
ToastUtil.showShort(this.getContext(), R.string.net_notConnectedHint);
}
}
protected void onLoad() {
listView.stopRefresh();
listView.stopLoadMore();
// 设置日期格式
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
// 获取当前系统时间
String nowTime = df.format(new Date(System.currentTimeMillis()));
// 释放时提示正在刷新时的当前时间
listView.setRefreshTime(nowTime);
}
class queryKnowledgeCourseList extends AsyncTask<String, Void, String>{
@Override
protected String doInBackground(String... strings) {
String url = HttpConstant.queryKnowledgeCourseList;
String postString = "studentId="+studentId+"&mchnId=MX0000001"+"&near2="+near2+"&knowledgeType=0012&pageNo="+pageIndex+"&pageSize="+pageSize;
LogUtils.e("postString：" , postString);
String json = HttpConnectionUtil.AccessUrlGET(getContext(),url +"?"+ postString);
LogUtils.e("json：" , json);
return json;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
ApiResponse<TBKnowledgeCourseVo> info = JsonUtils.jsonToJavaBean(result, ApiResponse.class);
if (info.getCode() != null && info.getCode().equals("10000")) {
list = JsonUtils.jsonToJavaBeanList(JSONArray.toJSONString(info.getData()), TBKnowledgeCourseVo.class);
alllist.addAll(list);
KnowledgeCourseAdapter2 mAdapter = new KnowledgeCourseAdapter2(getContext(), alllist);
listView.setAdapter(mAdapter);
}
}
}
}
但是点击按钮后会不定时出现以下问题
错误日志为：
--------- beginning of crash
2022-06-02 10:02:15.811 1514-1514/com.mxjy.ssep E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.mxjy.ssep, PID: 1514
java.lang.IndexOutOfBoundsException: Index: 1, Size: 1
at java.util.ArrayList.get(ArrayList.java:437)
at android.widget.HeaderViewListAdapter.isEnabled(HeaderViewListAdapter.java:164)
at android.widget.ListView.dispatchDraw(ListView.java:3503)
at android.view.View.draw(View.java:19126)
at android.widget.AbsListView.draw(AbsListView.java:4317)
at android.view.View.updateDisplayListIfDirty(View.java:18073)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4198)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4178)
at android.view.View.updateDisplayListIfDirty(View.java:18032)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4198)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4178)
at android.view.View.updateDisplayListIfDirty(View.java:18032)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4198)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4178)
at android.view.View.updateDisplayListIfDirty(View.java:18032)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4198)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4178)
at android.view.View.updateDisplayListIfDirty(View.java:18032)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4198)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4178)
at android.view.View.updateDisplayListIfDirty(View.java:18032)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4198)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4178)
at android.view.View.updateDisplayListIfDirty(View.java:18032)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4198)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4178)
at android.view.View.updateDisplayListIfDirty(View.java:18032)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4198)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4178)
at android.view.View.updateDisplayListIfDirty(View.java:18032)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4198)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4178)
at android.view.View.updateDisplayListIfDirty(View.java:18032)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4198)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4178)
at android.view.View.updateDisplayListIfDirty(View.java:18032)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4198)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4178)
at android.view.View.updateDisplayListIfDirty(View.java:18032)
at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:643)
at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:649)
at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:757)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2980)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2794)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2347)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1386)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6733)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)
at android.view.Choreographer.doCallbacks(Choreographer.java:723)
at android.view.Choreographer.doFrame(Choreographer.java:658)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)
at android.os.Handler.handleCallback(Handler.java:789)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
