//main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Spinner
android:id="@+id/spinner"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout> //TestActivity.java
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.ArrayList;
import android.app.Activity;
import android.app.ListActivity;
import android.content.Context;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.util.*;
import android.view.*;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.Spinner;
import android.widget.TextView;
public class TestActivity extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ArrayList<String> list = new ArrayList<String>();
list.add("one");
list.add("two");
list.add("three");
MyAdapter adapter = new MyAdapter(this,list);
Spinner spinner = (Spinner)findViewById(R.id.spinner);
spinner.setAdapter(adapter);
} class MyAdapter extends BaseAdapter{
private ArrayList<String> list;
private Context context;
public MyAdapter(Context context,ArrayList<String> list){
this.list = list;
this.context = context;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return list.size();
} @Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return arg0;
} @Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return arg0;
} @Override
public View getView(int position, View convertView, ViewGroup arg2) {
// TODO Auto-generated method stub
View row = convertView;
if(row ==null){
LayoutInflater inflater = LayoutInflater.from(context);
convertView =inflater.inflate(R.layout.simple, null);
TextView text = (TextView)convertView.findViewById(R.id.text);
text.setText(list.get(position));
}
return (row);
}
}
}
这是一个关于adapter的应用,咋就不能运行呢?望高手指点!谢谢!
// TODO Auto-generated method stub
return arg0;
}
change to public Object getItem(int arg0) {
// TODO Auto-generated method stub
return list.get(position);
}getView 写的也有问题。if(row ==null){
LayoutInflater inflater = LayoutInflater.from(context);
convertView =inflater.inflate(R.layout.simple, null);
TextView text = (TextView)convertView.findViewById(R.id.text);
text.setText(list.get(position));
}
你没有判断else 的情况。change to
if(row ==null){
LayoutInflater inflater = LayoutInflater.from(context);
row =inflater.inflate(R.layout.simple, null);
TextView text = (TextView)convertView.findViewById(R.id.text);
}
text.setText(list.get(position));