MainActivity:
## 侧滑的listview条目和viewpager的fragment进行交互联系,是两个fragment之间的联系。通过Activity作为中间人。
## 在Activity定义一个方法:
//position:listview条目
public void showPage(int position){
viewPager.setCurrentItem(position); //viewpager跳到指定的fragment
drawer.closeDrawer(Gravity.START); //同时关掉侧拉
}
为侧滑设置多条目和条目的点击事件:
package com.example.work9_10;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import me.maxwin.view.XListView;
public class leftFragment extends Fragment {
//定义变量
private ListView xListView;
private LeftAdapter adapter;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.leftfragment,container,false);
//获取资源ID
xListView=view.findViewById(R.id.xListView);
initData();
return view;
}
private void initData() {
//适配器
adapter=new LeftAdapter(getActivity());
xListView.setAdapter(adapter);
//让侧滑的fragment条目和Viewpager的fragment进行交互
xListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView <?> parent, View view, int position, long id) {
if (position==0){
return;
}
//************************position-1
((MainActivity)getActivity()).showPage(position-1);
}
});
}
}
ListView的适配器:
## 在适配器内进行多条目展示判断(一个ImageView和三个TextView)
package com.example.work9_10;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
public class LeftAdapter extends BaseAdapter {
private Context con;
private String[] menus={“我的”,“游戏”,“视频”};
public LeftAdapter(Context con) {
this.con = con;
}
//多条目
@Override
public int getViewTypeCount() {
return 2;
}
@Override
public int getItemViewType(int position) {
return position==0?0:1;
}
//-----------------------------------------------------
@Override //*************
public int getCount() {
//ImageView+TextView
return menus.length+1;
}
@Override //***************
public String getItem(int position) {
if (position==0){
return null;
}
//减去ImageView
return menus[position-1];
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView==null){
convertView=LayoutInflater.from(con)
.inflate(**getItemViewType(position)==0?R.layout.has_image:R.layout.no_image**,parent,false);
holder=new ViewHolder();
holder.textView=convertView.findViewById(R.id.textview);
convertView.setTag(holder);
}else {
holder= (ViewHolder) convertView.getTag();
}
//********************
if (getItemViewType(position)==1){
holder.textView.setText(getItem(position));
}
return convertView;
}
class ViewHolder{
TextView textView;
}
}
ListView展示的两种条目的XML:
no_image:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android=“http://schemas.android.com/apk/res/android” android:layout_width=“match_parent”
android:layout_height=“match_parent”>
</android.support.constraint.ConstraintLayout>
has_image:
<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout xmlns:android=“http://schemas.android.com/apk/res/android”
android:layout_width=“match_parent”
android:layout_height=“match_parent”
xmlns:app=“http://schemas.android.com/apk/res-auto”>
<ImageView
android:id="@+id/image"
android:layout_width="150dp"
android:layout_height="150dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:background="@mipmap/ic_launcher"
/>
</android.support.constraint.ConstraintLayout>