我想显示juice object的列表。但是这里只有一个对象，只显示一个object.getcount（）正在调用5次。但它没有显示。请帮助我。 我想显示juice object的列表。但是这里只得到一个对象，只显示一个object.getcount（）正在调用5次。但它没有显示。请帮助我。
//FoodHome.java
package com.example.hotelmenucard;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class FoodHome extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_food_home);
populateListView();
registerClickCallBack();
}
private void populateListView() {
String[] items={"All Day BreakFast","Salads","Sandwiches","Hot Drinks","Juices"};
ArrayAdapter<String> adapter=new ArrayAdapter<String>(
this, //Context for the activity
R.layout.text_view, //Layout to use(create)
items); //Items to be displayed
ListView list=(ListView)findViewById(R.id.listView1);
list.setAdapter(adapter);
}
private void registerClickCallBack() {
ListView list=(ListView)findViewById(R.id.listView1);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
/*TextView textview=(TextView)view;
String msg="hai"+textview.getText();
Toast.makeText(FoodHome.this, msg, Toast.LENGTH_LONG).show();*/
Intent i = new Intent(FoodHome.this, ItemList.class);
startActivity(i);
}
});
}
}
//ItemList.java
package com.example.hotelmenucard;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;
public class ItemList extends Activity {
private List<Juice> juices = new ArrayList<Juice>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_item_list);
populateJuiceList();
populateJuiceListView();
Log.i(juices.toString(),"list of juice");
}
private void populateJuiceList() {
juices.add(new Juice("Lemon", 15, "lemon*****", R.drawable.lemon));
juices.add(new Juice("Strawberry", 15, "Strawberry*****",
R.drawable.strawberry));
juices.add(new Juice("Watermelon", 15, "Watermelon*****",
R.drawable.watermelon));
juices.add(new Juice("Pear", 15, "pear*****", R.drawable.pear));
juices.add(new Juice("Pomegranate", 15, "Pomegranate*****",
R.drawable.pomegranate));
System.out.println(juices+"juices in list");
}
private void populateJuiceListView() {
ArrayAdapter<Juice> adapter = new MyListAdapter(R.layout.activity_item_list);
ListView list = (ListView) findViewById(R.id.carsListV);
list.setAdapter(adapter);
}
private class MyListAdapter extends ArrayAdapter<Juice> {
public MyListAdapter(int activityItemList) {
super(ItemList.this, activityItemList, juices);
}
public int getCount() {
System.out.println(juices.size()+"in getcount");
return juices.size();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
RelativeLayout itemView =(RelativeLayout) convertView;
if (itemView == null) {
itemView = (RelativeLayout)getLayoutInflater().inflate(R.layout.item_list,
parent, false);
}
Juice juice = juices.get(position+1);
ImageView imageView = (ImageView)itemView.findViewById(R.id.imageView1);
imageView.setImageResource(juice.getId());
TextView txt=(TextView)itemView.findViewById(R.id.textView1);
txt.setText(juice.getName());
TextView text1=(TextView)itemView.findViewById(R.id.textView2);
text1.setText(juice.getUsing());
itemView.bringToFront();
TextView t=(TextView)itemView.findViewById(R.id.textView3);
t.setText(Integer.toString(juice.getRate()));
System.out.println(itemView.getVisibility());
return itemView;
// return super.getView(position, convertView, parent);
}
}
}
//activity_item_list.xml
<RelativeLayout 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"
android:background="@drawable/bg"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.hotelmenucard.ItemList" >
<ListView
android:id="@+id/carsListV"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true" >
</ListView>
</RelativeLayout>
//item_list.xml (typo mistake changed from item_view.xml)
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="@drawable/bg"
android:gravity="top"
android:textColor="#B2F8F8" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:src="@drawable/lemon" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/imageView1"
android:layout_centerHorizontal="true"
android:text="TextView" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView2"
android:layout_alignBottom="@+id/textView2"
android:layout_alignParentRight="true"
android:text="TextView" />
</RelativeLayout>
答案 0 :(得分：0)
而不是ArrayAdapter<String> adapter=new ArrayAdapter<String>(
this,R.layout.text_view,items);
使用它
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, android.R.id.text1, items);