fragment嵌套recyclerview，recyclerview的item重复加载的问题怎么解决？

[qq_24617289]

做的是个仿微信的
主页面4个fragment。
1和2里面嵌套的recyclerview。
3和4里面是普通的界面
每次只要点3或4之后 在点回 1 或2 recyclerview里面的item就重复加载出来
请问有没有办法解决
代码如下
主页面
public class My_Main_Activity extends FragmentActivity implements View.OnClickListener {
LinearLayout shouye_layout,changjing_layout,anfang_layout,gengduo_layout;
ViewPager viewPager;
ImageButton yuyin_ivbt;
TextView shouye_tv,changjing_tv,anfang_tv,gengduo_tv;
//存放fragment集合
List<Fragment> list;
//4个Fragment
HomePageFragment shouye;
SceneFragment changjing;
SecurityFragment anfang;
MoreFragment gengduo;
int white,gray;
//适配器
MyAdapter myAdapter;
FragmentManager fragmentManager;
//资源类res
Resources resources;
// viewpage监听类
MyPageChangeListener myPageChangeListener;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.my_main_activity);
//通过getSupportFragmentManager（）获取fragmentManager实例
fragmentManager= getSupportFragmentManager();
resources=getResources();
white=resources.getColor(R.color.colorbaizi);
gray=resources.getColor(R.color.colorhuizi);
initK();
initPager();
firstinto();
}

/**
* 初始化控件
* */
public void initK(){
myPageChangeListener=new MyPageChangeListener();
viewPager= (ViewPager) findViewById(R.id.view_pager);
viewPager.setOnPageChangeListener(myPageChangeListener);

shouye_layout= (LinearLayout) findViewById(R.id.shouye_layout);
changjing_layout= (LinearLayout) findViewById(R.id.changjing_layout);
anfang_layout= (LinearLayout) findViewById(R.id.anfang_layout);
gengduo_layout= (LinearLayout) findViewById(R.id.gengduo_layout);
yuyin_ivbt= (ImageButton) findViewById(R.id.yuyin_ivbt);

shouye_tv= (TextView) findViewById(R.id.shouye_tv);
changjing_tv= (TextView) findViewById(R.id.changjing_tv);
anfang_tv= (TextView) findViewById(R.id.anfang_tv);
gengduo_tv= (TextView) findViewById(R.id.gengduo_tv);

shouye_layout.setOnClickListener(this);
changjing_layout.setOnClickListener(this);
anfang_layout.setOnClickListener(this);
gengduo_layout.setOnClickListener(this);
View v =findViewById(R.id.yuyin_ivbt);//找到你要设透明背景的layout 的id
v.getBackground().setAlpha(0);//0~255透明度值
yuyin_ivbt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(view.getContext(),"语音按钮",Toast.LENGTH_LONG).show();
}
});
}
//初始化页面
private void initPager(){
list=new ArrayList<Fragment>();
shouye=new HomePageFragment();
changjing=new SceneFragment();
anfang=new SecurityFragment();
gengduo=new MoreFragment();
list.add(shouye);
list.add(changjing);
list.add(anfang);
list.add(gengduo);
myAdapter=new MyAdapter(fragmentManager,list);
viewPager.setAdapter(myAdapter);
}
//第一次进入页面的默认页面
private void firstinto(){
clearTuBiao();
shouye_tv.setTextColor(white);
}
@Override
public void onClick(View view) {
ChangeZiTi(view.getId());
}
//继承了ViewPage滑动监听事件
private class MyPageChangeListener implements ViewPager.OnPageChangeListener{
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
//通过onPageSelected回调方法传过来的参数可以得当前页面的位置编码
@Override
public void onPageSelected(int position) {
//调用下面的改变图标方法改变图标
ChangeZiTi(position);
}
@Override
public void onPageScrollStateChanged(int state) {
}
}
//改变图标的方法
private void ChangeZiTi(int i){
//清空选中项
clearTuBiao();
switch (i){
case R.id.shouye_layout : case 0:
//通过 viewPager.setCurrentItem();可以命令viewPager滑动到指定页面
//参数为int类型
viewPager.setCurrentItem(0);
shouye_tv.setTextColor(white);
break;
case R.id.changjing_layout:case 1:
viewPager.setCurrentItem(1);
changjing_tv.setTextColor(white);
break;
case R.id.anfang_layout:case 2:
viewPager.setCurrentItem(2);
anfang_tv.setTextColor(white);
break;
case R.id.gengduo_layout:case 3:
viewPager.setCurrentItem(3);
gengduo_tv.setTextColor(white);
break;
}
}
//清空字体的方法
private void clearTuBiao(){

shouye_tv.setTextColor(gray);
changjing_tv.setTextColor(gray);
anfang_tv.setTextColor(gray);
gengduo_tv.setTextColor(gray);
}
}

[zrf1335348191]

代码每太仔细看，不过看标题感觉列表加载混乱，我以前遇到过http://blog.csdn.net/zrf1335348191/article/details/49993897，你要是把这个链接看明白了，问题就迎刃而解了

[moonFY]

应该是list 没清空吧。

[qq_24617289]

Fragment public class HomePageFragment extends Fragment implements View.OnClickListener,PopupMenu.OnMenuItemClickListener { private List<Home> list = new ArrayList<>(); ImageView shouye_ADD; Intent intent; private RecyclerView recyclerView; private PullToLoadRecyclerView rcv_shouye; private Handler handler; @Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View view_shouye = inflater.inflate(R.layout.home_page, container, false); Home_adapter adapter = new Home_adapter(list); handler = new Handler(); rcv_shouye = (PullToLoadRecyclerView)view_shouye.findViewById(R.id.rcv_shouye); rcv_shouye.setLayoutManager(new GridLayoutManager(getContext(),3)); init(); rcv_shouye.setAdapter(adapter); //设置刷新监听 rcv_shouye.setOnRefreshListener(new OnRefreshListener() { @Override public void onStartRefreshing() { handler.postDelayed(new Runnable() { @Override public void run() { rcv_shouye.completeRefresh(); } }, 1000); } }); // 设置加载监听 rcv_shouye.setOnLoadListener(new OnLoadListener() { @Override public void onStartLoading(int skip) { handler.postDelayed(new Runnable() { @Override public void run() { rcv_shouye.completeLoad(); } }, 1000); } }); shouye_ADD = (ImageView) view_shouye.findViewById(R.id.shouye_ADD); shouye_ADD.setOnClickListener(this); return view_shouye; } private void init() { Area.queryAreasByUsername((result, error)->{ if(error!=null){ LogUtils.i(error); }else { List<Map<String,Object>> list1 =(List<Map<String,Object>>)result; for (int i=0;i<list1.size();i++){ Home home=new Home(String.valueOf(list1.get(i).get("name")),String.valueOf(list1.get(i).get("num"))); list.add(home); } } }); } @Override public void onClick(View vieww) { PopupMenu popup = new PopupMenu(getContext(), vieww); MenuInflater inflater = popup.getMenuInflater(); inflater.inflate(R.menu.add_wind, popup.getMenu()); popup.setOnMenuItemClickListener(this); popup.show(); } @Override public boolean onMenuItemClick(MenuItem menuItem) { switch (menuItem.getItemId()) { case R.id.wind_add_shebei: intent = new Intent(getContext(), Add_shebei.class); startActivity(intent); break; case R.id.wind_add_quyu: intent = new Intent(getContext(), Add_quyu.class); startActivity(intent); break; default: break; } return false; } } adapter.java public class Home_adapter extends RecyclerView.Adapter<Home_adapter.ViewHolder> { private List<Home> list; public Home home; private PullToLoadRecyclerView rcv_shouye; public class ViewHolder extends RecyclerView.ViewHolder { ImageView img_shouye_item; TextView tv_shouye_item_neirong, tv_shouye_item_shuzi; LinearLayout Rlayout; public ViewHolder(View View) { super(View); //实例化控件 img_shouye_item = (ImageView) View.findViewById(R.id.img_shouye_item); tv_shouye_item_neirong = (TextView) View.findViewById(R.id.tv_shouye_item_neirong); tv_shouye_item_shuzi = (TextView) View.findViewById(R.id.tv_shouye_item_shuzi); Rlayout = (LinearLayout) View.findViewById(R.id.Rlayout12); rcv_shouye = (PullToLoadRecyclerView) View.findViewById(R.id.rcv_shouye); } } //布局管理器 public Home_adapter(List<Home> homelist) { list = homelist; } @Override public ViewHolder onCreateViewHolder(ViewGroup parent, final int viewType) { View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.shouye_item, parent, false); ViewHolder holder = new ViewHolder(view); return holder; } @Override public void onBindViewHolder(ViewHolder holder, final int position) { home = list.get(position); holder.tv_shouye_item_shuzi.setText(home.getNum()); holder.tv_shouye_item_neirong.setText(home.getName()); holder.Rlayout.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { switch (position) { case 0: Intent intent = new Intent(view.getContext(), Add_ShouYe_WoShi.class); view.getContext().startActivity(intent);

[code=java]

[/code] break; case 1: Intent intent2 = new Intent(view.getContext(), My_Humidifier.class); view.getContext().startActivity(intent2); break; } } }); } @Override public int getItemCount() { return list.size(); } }

[qq_29232445]

fragmentManager默认缓存三个页面，即当前和相邻的页面，切到3或4就会导致重新走oncreateview（），数据没清空就重载咯。在@Override public boolean getUserVisibleHint() {//适用FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();transaction.hide(from).show(to).commitAllowingStateLoss(); return super.getUserVisibleHint(); } @Override public void onHiddenChanged(boolean hidden) {//适用于viewpager super.onHiddenChanged(hidden); } 进行数据管理

[qq_24617289]

Viewpager.setOffscreenPageLimit(4); Viewpager设置成4个缓存就好了