在片段中实现listview
我试图在listView中创建一个具有该行布局的项目列表,这些项目位于片段中,但每次运行代码时,我在listView中什么也得不到 rowlist_layout.xml在片段中实现listview,listview,android-listfragment,Listview,Android Listfragment,我试图在listView中创建一个具有该行布局的项目列表,这些项目位于片段中,但每次运行代码时,我在listView中什么也得不到 rowlist_layout.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" andr
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_marginBottom="1dp"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/listIcon"
android:layout_width="60dp"
android:layout_height="60dp"
android:src="@drawable/no_image"
android:padding="5dp"/>
<LinearLayout android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/list_item"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_vertical"
android:layout_margin="16dp"
android:textSize="16sp"
android:textStyle="bold"
/>
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
android:layout_marginLeft="10dp"/>
</LinearLayout>
</LinearLayout>
fragment_display_lists.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="layout.Display_lists"
android:layout_marginTop="10dp">
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" >
</ListView>
</FrameLayout>
我的ListAdapter.java
package layout;
import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class ListAdapter extends ArrayAdapter<String> {
private final Activity context;
private final String[] itemname;
private final Integer[] imgid;
public ListAdapter (Activity context,String[] itemname, Integer[] imgid){
super(context, R.layout.fragment_display_lists,itemname);
this.context=context;
this.itemname=itemname;
this.imgid=imgid;
}
public View getView (int position,View view,ViewGroup parent)
{
LayoutInflater inflater = context.getLayoutInflater();
View rowView = inflater.inflate(R.layout.rowlist_layout,null,true);
TextView title = (TextView) rowView.findViewById(R.id.list_item);
ImageView imageView = (ImageView) rowView.findViewById(R.id.listIcon);
TextView extratxt = (TextView) rowView.findViewById(R.id.textView);
title.setText(itemname[position]);
imageView.setImageResource(imgid[position]);
extratxt.setText("Description "+itemname[position]);
return rowView;
};
}
包装布局;
导入android.app.Activity;
导入android.view.LayoutInflater;
导入android.view.view;
导入android.view.ViewGroup;
导入android.widget.ArrayAdapter;
导入android.widget.ImageView;
导入android.widget.TextView;
公共类ListAdapter扩展了ArrayAdapter{
私人最终活动背景;
私有最终字符串[]itemname;
私有最终整数[]imgid;
公共ListAdapter(活动上下文,字符串[]项名称,整数[]imgid){
super(上下文,R.layout.fragment\u display\u列表,itemname);
this.context=context;
this.itemname=itemname;
this.imgid=imgid;
}
公共视图getView(内部位置、视图视图、视图组父视图)
{
LayoutInflater充气器=上下文。getLayoutInflater();
视图行视图=充气机。充气(R.layout.rowlist\u布局,null,true);
TextView title=(TextView)rowView.findViewById(R.id.list_项);
ImageView ImageView=(ImageView)rowView.findViewById(R.id.listIcon);
TextView extratxt=(TextView)rowView.findViewById(R.id.TextView);
title.setText(项目名称[位置]);
setImageResource(imgid[position]);
extractxt.setText(“说明”+项目名称[位置]);
返回行视图;
};
}
Display_lists.java
package layout;
import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
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.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.Toast;
public class Display_lists extends Fragment{
ListView list;
String[] itemname ={
"Item 1",
"item 2",
"item 3",
"item 4",
"item 5",
};
Integer[] imgid= {
R.drawable.no_image,
R.drawable.no_image,
R.drawable.no_image,
R.drawable.no_image,
R.drawable.no_image,
};
private OnFragmentInteractionListener mListener;
public Display_lists() {
// Required empty public constructor
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ListAdapter adapter=new ListAdapter(getActivity(),itemname, imgid);
list=(ListView) getActivity().findViewById (R.id.list);
list.setAdapter(adapter);
list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
String Slecteditem= itemname[+position];
Toast.makeText(getActivity().getApplicationContext(), Slecteditem, Toast.LENGTH_SHORT).show();
}
});
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_display_lists, container, false);
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
@Override
public void onDetach() {
super.onDetach();
mListener = null;
}
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
void onFragmentInteraction(Uri uri);
}
}
包装布局;
导入android.content.Context;
导入android.net.Uri;
导入android.os.Bundle;
导入android.support.v4.app.Fragment;
导入android.view.LayoutInflater;
导入android.view.view;
导入android.view.ViewGroup;
导入android.widget.AdapterView;
导入android.widget.AdapterView.OnItemClickListener;
导入android.widget.ListView;
导入android.widget.Toast;
公共类显示列表扩展了片段{
列表视图列表;
字符串[]itemname={
“项目1”,
“项目2”,
“项目3”,
“项目4”,
“项目5”,
};
整数[]imgid={
R.drawable.no_图像,
R.drawable.no_图像,
R.drawable.no_图像,
R.drawable.no_图像,
R.drawable.no_图像,
};
私有OnFragmentInteractionListener mListener;
公共显示列表(){
//必需的空公共构造函数
}
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
ListAdapter=新的ListAdapter(getActivity(),itemname,imgid);
list=(ListView)getActivity().findViewById(R.id.list);
list.setAdapter(适配器);
list.setOnItemClickListener(新的OnItemClickListener(){
@凌驾
public void onItemClick(AdapterView父级、视图、,
内部位置,长id){
//TODO自动生成的方法存根
字符串slectedem=itemname[+position];
Toast.makeText(getActivity().getApplicationContext(),Slecteditem,Toast.LENGTH_SHORT).show();
}
});
}
@凌驾
创建视图上的公共视图(布局、充气机、视图组容器、,
Bundle savedInstanceState){
//为该碎片膨胀布局
返回充气机。充气(R.layout.fragment\u显示列表,容器,错误);
}
@凌驾
公共void-onAttach(上下文){
super.onAttach(上下文);
if(OnFragmentInteractionListener的上下文实例){
mListener=(OnFragmentInteractionListener)上下文;
}否则{
抛出新的RuntimeException(context.toString()
+“必须实现OnFragmentInteractionListener”);
}
}
@凌驾
公共无效连接(){
super.onDetach();
mListener=null;
}
FragmentInteractionListener上的公共接口{
//TODO:更新参数类型和名称
void onFragmentInteraction(Uri);
}
}
我在android帮助中还是新手:/尝试如下编辑onCreateView:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_display_lists, container, false);
ListAdapter adapter = new ListAdapter(getActivity(),itemname, imgid);
list = (ListView) rootView.findViewById (R.id.list);
list.setAdapter(adapter);
list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
String Slecteditem= itemname[position];
Toast.makeText(getActivity().getApplicationContext(), Slecteditem, Toast.LENGTH_SHORT).show();
}
});
return rootView;
}
@覆盖
创建视图上的公共视图(布局、充气机、视图组容器、,
Bundle savedInstanceState){
//为该碎片膨胀布局
视图根视图=充气机。充气(R.layout.fragment\u display\u list,container,false);
ListAdapter=新的ListAdapter(getActivity(),itemname,imgid);
list=(ListView)rootView.findViewById(R.id.list);
list.setAdapter(适配器);
list.setOnItemClickListener(新的OnItemClickListener(){
@凌驾
public void onItemClick(AdapterView父级、视图、,
内部位置,长id){
//TODO自动生成的方法存根
字符串slectedem=itemname[position];
Toast.makeText(getActivity().getApplicationContext(),Slecteditem,Toast.LENGTH_SHORT).show();
}
});
返回rootView;
}
并从onCreate中删除Listview内容尝试如下编辑onCreateView:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_display_lists, container, false);
ListAdapter adapter = new ListAdapter(getActivity(),itemname, imgid);
list = (ListView) rootView.findViewById (R.id.list);
list.setAdapter(adapter);
list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
String Slecteditem= itemname[position];
Toast.makeText(getActivity().getApplicationContext(), Slecteditem, Toast.LENGTH_SHORT).show();
}
});
return rootView;
}
@覆盖
创建视图上的公共视图(布局、充气机、视图组容器、,
Bundle savedInstanceState){
//为该碎片膨胀布局
视图根视图=充气机。充气(R.layout.fragment\u display\u list,container,false);
ListAdapter=新的ListAdapter(getActivity(),itemname,imgid);
list=(ListView)rootView.findViewById(R.id.list);
list.setAdapter(适配器);
list.setOnItemClickListener(新的OnItemClickListener(){
@凌驾
public void onItemClick(AdapterView父级、视图、,
内部位置,长id){