自定义spinner样式

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主要是思路是继承baseadapter,然后重写getview()以及getDropDownView（）两个方法，getview（）主要是控制显示界面，getDropDownView主要是控制下拉界面，下面上代码

import android.os.Bundle;import android.app.Activity;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.Spinner;import android.widget.TextView;public class MainActivity extends Activity {    private Spinner spinner;    String[] names = new String[]{"北京", "上海", "广州", "成都", "深圳"};    @Overrideprotected    void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();    }    private void initView() {        spinner = (Spinner) findViewById(R.id.spinner);        CustomSpinnerAdapter adapter = new CustomSpinnerAdapter(this);        spinner.setAdapter(adapter);    }    class CustomSpinnerAdapter extends BaseAdapter {        private Context context;        private LayoutInflater inflater;        public CustomSpinnerAdapter(Context context) {        // TODO Auto-generated constructor stub            this.context = context;            this.inflater = LayoutInflater.from(context);        }        @Override        public int getCount() {        // TODO Auto-generated method stub            return names.length;        }        @Override        public Object getItem(int position) {        // TODO Auto-generated method stub            return names[position];        }        @Override        public long getItemId(int position) {        // TODO Auto-generated method stub            return position;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {        // TODO Auto-generated method stub            convertView = inflater.inflate(R.layout.spinner_item, null);            TextView tv = (TextView) convertView.findViewById(R.id.nametv);            ImageView image = (ImageView) convertView.findViewById(R.id.imageview);            tv.setText(names[position]);            return convertView;        }        @Override        public View getDropDownView(int position, View convertView, ViewGroup parent) {// TODO Auto-generated method stub            convertView = inflater.inflate(android.R.layout.simple_dropdown_item_1line, null);            TextView tv1 = (TextView) convertView.findViewById(android.R.id.text1);            tv1.setText(names[position]);            return convertView;        }    }}

这是逻辑代码，主要是思路是继承baseadapter,然后重写getview()以及getDropDownView（）两个方法，getview（）主要是控制显示界面，getDropDownView主要是控制下拉界面，看看xml文件

<pre name="code" class="java"><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <Spinner        android:id="@+id/spinner"        android:layout_width="180dp"        android:background="@null"        android:layout_height="wrap_content" /></RelativeLayout>

下面是界面显示的布局即getview方法中所要加载的布局文件

<pre name="code" class="java"><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="horizontal" >    <TextView        android:id="@+id/nametv"        android:layout_width="wrap_content"        android:layout_height="match_parent"        android:gravity="center"        android:layout_weight="6" />    <ImageView        android:id="@+id/imageview"        android:layout_width="wrap_content"        android:layout_height="match_parent"        android:layout_weight="1"        android:src="@drawable/ic_launcher"         /></LinearLayout>

这就是自定义spinner样式，如果想改变下拉界面的布局，只需要自已定义一个布局，然后在getDropDownView方法中加载布局给空间赋值即可，有问题欢迎留言

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