本文实例讲述了android控件之spinner用法。分享给大家供大家参考。具体如下：
以下模拟下拉列表的用法
布局文件：
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<?xml version="1.0" encoding="utf-8"?>
<linearlayout android:id="@+id/linearlayout01"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android">
<textview android:text="@string/ys"
android:id="@+id/textview01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textsize="28dip" />
<spinner android:id="@+id/spinner01"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</linearlayout>
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spinneractivity类：
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package com.ljq.sp;
import android.app.activity;
import android.os.bundle;
import android.util.log;
import android.view.view;
import android.view.viewgroup;
import android.widget.adapterview;
import android.widget.baseadapter;
import android.widget.imageview;
import android.widget.linearlayout;
import android.widget.spinner;
import android.widget.textview;
import android.widget.adapterview.onitemselectedlistener;
public class spinneractivity extends activity {
private spinner sp = null;//下拉列表
private textview tv = null;
// 所有资源图片的数组
private int[] drawableids={r.drawable.football,r.drawable.basketball,r.drawable.volleyball};
// 所有字符串的数组
private int[] msgids={r.string.zq,r.string.lq,r.string.pq};
@override
public void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.main);
tv = (textview) findviewbyid(r.id.textview01);
sp=(spinner)this.findviewbyid(r.id.spinner01);//初始化spinner
sp.setadapter(adapter);
sp.setonitemselectedlistener(new onitemselectedlistener() {
public void onitemselected(adapterview<?> parent, view view, int positon, long id) {
linearlayout ll = (linearlayout) view;
view v=ll.getchildat(0);//获取第一个控件imageview
log.i("ljq", v.getclass().getname());
textview tvn = (textview) ll.getchildat(1);//获取第二个控件textview
stringbuilder sb = new stringbuilder();
sb.append(getresources().gettext(r.string.ys)).append(":").append(tvn.gettext());
tv.settext(sb.tostring());
}
public void onnothingselected(adapterview<?> parent) {
}
});
}
private baseadapter adapter = new baseadapter(){
public int getcount() {
return drawableids.length;
}
public object getitem(int position) {
return drawableids[position];
}
public long getitemid(int position) {
return position;
}
public view getview(int position, view convertview, viewgroup parent) {
linearlayout ll = new linearlayout(spinneractivity.this);
ll.setorientation(linearlayout.horizontal);
imageview iv = new imageview(spinneractivity.this);
iv.setimageresource(drawableids[position]);
ll.addview(iv);
textview tv=new textview(spinneractivity.this);
tv.settext(msgids[position]);//设置内容
tv.settextsize(24);
tv.settextcolor(r.color.black);
ll.addview(tv);
return ll;
}
};
}
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运行结果
希望本文所述对大家的android序设计有所帮助。