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:
<?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:
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ImageViewLog.i("ljq", v.getClass().getName());TextView tvn = (TextView) ll.getChildAt(1);//获取第二个控件TextViewStringBuilder 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。