Java listView阵列适配器错误
尝试将arrayAdapter的构造函数用于listView时遇到错误。当我这样称呼它时:Java listView阵列适配器错误,java,android,eclipse,listview,Java,Android,Eclipse,Listview,尝试将arrayAdapter的构造函数用于listView时遇到错误。当我这样称呼它时: ListArrayAdapter adapters = new ListArrayAdapter(this, R.layout.list_view_row_item, foodList); 我得到错误(在eclipse中): 构造函数ListArrayAdapter(上下文、int、ArrayList)未定义。 这是arrayAdapter的代码: import java.util.Array
ListArrayAdapter adapters = new ListArrayAdapter(this, R.layout.list_view_row_item, foodList);
我得到错误(在eclipse中):
构造函数ListArrayAdapter(上下文、int、ArrayList)未定义。
这是arrayAdapter的代码:
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import android.app.Activity;
import android.app.LauncherActivity.ListItem;
import android.content.Context;
import android.os.Handler;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ProgressBar;
import android.widget.TextView;
public class ListArrayAdapter extends ArrayAdapter<ListItem> {
Context mContext;
int layoutResourceId;
ListItem data[] = null;
private ProgressBar progressBar;
private int progressStatus = 0;
private TextView textView;
private Handler handler = new Handler();
ArrayList<ListItem> foodList = new ArrayList<ListItem>();
public ListArrayAdapter(Context mContext, int layoutResourceId, ArrayList<ListItem> foodList) {
super(mContext, layoutResourceId, foodList);
this.layoutResourceId = layoutResourceId;
this.mContext = mContext;
this.foodList = foodList;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView==null){
// inflate the layout
LayoutInflater inflater = ((Activity) mContext).getLayoutInflater();
convertView = inflater.inflate(layoutResourceId, parent, false);
}
return convertView;
}
import java.util.ArrayList;
导入java.util.Calendar;
导入java.util.Date;
导入android.app.Activity;
导入android.app.LauncherActivity.ListItem;
导入android.content.Context;
导入android.os.Handler;
导入android.view.LayoutInflater;
导入android.view.view;
导入android.view.ViewGroup;
导入android.widget.ArrayAdapter;
导入android.widget.ProgressBar;
导入android.widget.TextView;
公共类ListArrayAdapter扩展了ArrayAdapter{
语境;
国际布局资源;
ListItem数据[]=null;
私人ProgressBar ProgressBar;
私有状态=0;
私有文本视图文本视图;
私有处理程序=新处理程序();
ArrayList foodList=新建ArrayList();
公共列表ArrayAdapter(上下文mContext、内部布局资源ID、ArrayList foodList){
super(mContext、layoutResourceId、foodList);
this.layoutResourceId=layoutResourceId;
this.mContext=mContext;
this.foodList=foodList;
}
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
if(convertView==null){
//使布局膨胀
LayoutFlater充气器=((活动)mContext.getLayoutFlater();
convertView=充气机。充气(layoutResourceId,父项,false);
}
返回视图;
}
我计划的主要部分:
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import android.app.Activity;
import android.app.Fragment;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
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;
import com.app.fridgelist.*;
public class MainScreen extends Activity {
private static Calendar d = Calendar.getInstance();
private static Date kurrentTime = d.getTime();
public int listItems;
public static Context mainScreen;
public ArrayList<ListItem> foodList = new ArrayList<ListItem>();
private static ListItem newFood1 = new ListItem(0, "Pasta", 99, (int) (kurrentTime.getTime()));
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_screen);
if (savedInstanceState == null) {
//getFragmentManager().beginTransaction()
//.add(R.id.container, new PlaceholderFragment())
//.commit();
}
mainScreen = this;
foodList.add(newFood1);
listItems = 1;
ListArrayAdapter adapters = new ListArrayAdapter(getBaseContext(), R.layout.list_view_row_item, foodList);
ListView yourListView = (ListView) findViewById(R.id.listOne);
//yourListView.setAdapter(adapters);
//yourListView.setOnItemClickListener(new OnItemClickListener() {
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main_screen, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main_screen, container, false);
return rootView;
}
}
}
import java.util.ArrayList;
导入java.util.Calendar;
导入java.util.Date;
导入android.app.Activity;
导入android.app.Fragment;
导入android.content.Context;
导入android.os.Bundle;
导入android.view.LayoutInflater;
导入android.view.Menu;
导入android.view.MenuItem;
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;
导入com.app.fridgelist.*;
公共类主屏幕扩展活动{
私有静态日历d=Calendar.getInstance();
私有静态日期kurrentTime=d.getTime();
公共物品清单;
公共静态上下文主屏幕;
public ArrayList foodList=new ArrayList();
私有静态ListItem newFood1=newListItem(0,“意大利面”,99,(int)(kurrentTime.getTime());
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity\u主屏幕);
如果(savedInstanceState==null){
//getFragmentManager().beginTransaction()
//.add(R.id.container,新的占位符片段())
//.commit();
}
主屏幕=此;
foodList.add(newFood1);
列表项=1;
ListArrayAdapter=new ListArrayAdapter(getBaseContext(),R.layout.list\u view\u row\u item,foodList);
ListView yourListView=(ListView)findViewById(R.id.listOne);
//setAdapter(适配器);
//setOnItemClickListener(新的OnItemClickListener(){
}
@凌驾
公共布尔onCreateOptions菜单(菜单){
//为菜单充气;这会将项目添加到操作栏(如果存在)。
getMenuInflater().充气(右菜单主屏幕,菜单);
返回true;
}
@凌驾
公共布尔值onOptionsItemSelected(菜单项项){
//处理操作栏项目单击此处。操作栏将
//自动处理Home/Up按钮上的点击,只要
//在AndroidManifest.xml中指定父活动时。
int id=item.getItemId();
if(id==R.id.action\u设置){
返回true;
}
返回super.onOptionsItemSelected(项目);
}
/**
*包含简单视图的占位符片段。
*/
公共静态类占位符片段扩展了片段{
公共占位符片段(){
}
@凌驾
创建视图上的公共视图(布局、充气机、视图组容器、,
Bundle savedInstanceState){
视图根视图=充气机。充气(R.layout.fragment\u主屏幕,容器,错误);
返回rootView;
}
}
}
从此处更改
ListArrayAdapter adapters = new ListArrayAdapter(getBaseContext(), R.layout.list_view_row_item, foodList);
到
//试试这个方法,希望对你有帮助。。。
activity_main.xml
list_item.xml
MainActivity.java
公共类MainActivity扩展了活动{
私人食品;
ArrayList食物列表;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lstFood=(列表视图)findviewbyd(R.id.lstFood);
foodList=newArrayList();
HashMap food1=新的HashMap();
food1.put(“id”,“1”);
food1.put(“名称”、“意大利面”);
food1.put(“奖品”、“99”);
food1.put(“time”,String.valueOf(Calendar.getInstance().getTime());
HashMap food2=新HashMap();
food2.put(“id”,“2”);
食物2.放置(“名称”、“比萨饼”);
food2.put(“奖品”、“199”);
food2.put(“time”,String.valueOf(Calendar.getInstance().getTime());
foodList.add(food1);
foodList.add(food2);
CustomAdapter=新的CustomAdapter(这是foodList);
lstFood.setAdapter(适配器);
lstFood.setOnItemClickListener(新的AdapterView.OnItemClickListener(){
@凌驾
public void onItemClick(AdapterView父对象、视图、整型位置、长id){
HashMap food=foodList.get(位置);
System.out.println(“食物Id:+Food.get”(“Id”);
System.out.println(“食品名称:”+Food.get(“名称”);
System.out.println(“食品奖:”+食品获得(“pri
ListArrayAdapter adapters = new ListArrayAdapter(getBaseContext(), R.layout.list_view_row_item, foodList);
ListArrayAdapter adapters = new ListArrayAdapter(YourActivityName.this, R.layout.list_view_row_item, foodList);
yourListView.setAdapter(adapters);
// try this way,hope this will help you...
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ListView
android:id="@+id/lstFood"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
list_item.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="5dp">
<TextView
android:id="@+id/txtFood"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"/>
</LinearLayout>
MainActivity.java
public class MainActivity extends Activity {
private ListView lstFood;
ArrayList<HashMap<String,String>> foodList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lstFood = (ListView) findViewById(R.id.lstFood);
foodList = new ArrayList<HashMap<String, String>>();
HashMap<String,String> food1 = new HashMap<String,String>();
food1.put("id","1");
food1.put("name","pasta");
food1.put("prize","99");
food1.put("time",String.valueOf(Calendar.getInstance().getTime()));
HashMap<String,String> food2 = new HashMap<String,String>();
food2.put("id","2");
food2.put("name","pizza");
food2.put("prize","199");
food2.put("time",String.valueOf(Calendar.getInstance().getTime()));
foodList.add(food1);
foodList.add(food2);
CustomAdapter adapters = new CustomAdapter(this,foodList);
lstFood.setAdapter(adapters);
lstFood.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
HashMap<String,String> food = foodList.get(position);
System.out.println("Food Id : "+food.get("id"));
System.out.println("Food Name : "+food.get("name"));
System.out.println("Food Prize : "+food.get("prize"));
System.out.println("Food Time : "+food.get("time"));
}
});
}
class CustomAdapter extends BaseAdapter {
private Context mContext;
private ArrayList<HashMap<String,String>> foodList;
public CustomAdapter(Context mContext,ArrayList<HashMap<String,String>> foodList) {
this.mContext = mContext;
this.foodList = foodList;
}
@Override
public Object getItem(int position) {
return foodList.get(position);
}
@Override
public int getCount() {
return foodList.size();
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = LayoutInflater.from(mContext).inflate(R.layout.list_item, parent, false);
holder.txtFood = (TextView) convertView.findViewById(R.id.txtFood);
convertView.setTag(holder);
}else{
holder = (ViewHolder) convertView.getTag();
}
holder.txtFood.setText(foodList.get(position).get("name"));
return convertView;
}
class ViewHolder{
TextView txtFood;
}
}
}