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> |
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; } }; } |
运行结果
希望本文所述对大家的android序设计有所帮助。