android spinner实例,Android控件之Spinner用法实例分析

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：

android:layout_width="fill_parent" android:layout_height="fill_parent"

android:orientation="vertical"

xmlns:android="http://schemas.android.com/apk/res/android">

android:id="@+id/TextView01"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:textSize="28dip" />

android:layout_width="fill_parent"

android:layout_height="wrap_content" />

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。