学步园

目录结构

第一步：

/SpinnerDemo/res/values/strings.xml

<?xml version="1.0" encoding="utf-8"?><br /> <resources><br /> <string name="app_name">下拉列表</string><br /> <string name="hobby">你的爱好</string><br /> <string name="basketball">篮球</string><br /> <string name="football">足球</string><br /> <string name="volleyball">排球</string><br /> </resources><br />

第二步：

/SpinnerDemo/res/values/colors.xml

<?xml version="1.0" encoding="utf-8"?><br /> <resources><br /> <color name="black">#000000</color><br /> </resources>

第三步：

/SpinnerDemo/res/layout/spinner_layout.xml

<?xml version="1.0" encoding="utf-8"?><br /> <LinearLayout<br /> xmlns:android="http://schemas.android.com/apk/res/android"<br /> android:orientation="vertical"<br /> android:layout_width="fill_parent"<br /> android:layout_height="wrap_content"><br /> <TextView android:id="@+id/textView"<br /> android:layout_width="fill_parent"<br /> android:layout_height="wrap_content"<br /> android:textSize="28dip"<br /> android:text="@string/hobby"/><br /> <Spinner android:id="@+id/spinner"<br /> android:layout_width="fill_parent"<br /> android:layout_height="wrap_content"<br /> /><br /> </LinearLayout><br />

第四步：

/SpinnerDemo/src/com/myspinner/demo/SpinnerActivity.java

package com.myspinner.demo;</p> <p>import android.app.Activity;<br /> import android.os.Bundle;<br /> import android.view.View;<br /> import android.view.ViewGroup;<br /> import android.widget.AdapterView;<br /> import android.widget.BaseAdapter;<br /> import android.widget.ImageView;<br /> import android.widget.LinearLayout;<br /> import android.widget.Spinner;<br /> import android.widget.TextView;<br /> import android.widget.AdapterView.OnItemSelectedListener;</p> <p>public class SpinnerActivity extends Activity {</p> <p> int[] hobbyStrIds = {R.string.basketball,<br /> R.string.football, R.string.volleyball};</p> <p> int[] hobbyImgIds = {R.drawable.basketball,<br /> R.drawable.football, R.drawable.volleyball};</p> <p> @Override<br /> public void onCreate(Bundle savedInstanceState) {<br /> super.onCreate(savedInstanceState);<br /> setContentView(R.layout.spinner_layout);</p> <p> Spinner spinner = (Spinner) findViewById(R.id.spinner);<br /> SpinnerAdapter adapter = new SpinnerAdapter();<br /> spinner.setAdapter(adapter);</p> <p> //选中监听器<br /> OnItemSelectedListener listener = new OnItemSelectedListener() {</p> <p> @Override<br /> public void onItemSelected(AdapterView<?> parent, View view,<br /> int position, long id) {<br /> TextView textView = (TextView) findViewById(R.id.textView);</p> <p> LinearLayout linearLayout = (LinearLayout) view;</p> <p> TextView spinnerTextView = (TextView) linearLayout.getChildAt(1);<br /> StringBuilder strBuilder = new StringBuilder();</p> <p> strBuilder.append(getResources().getText(R.string.hobby));<br /> strBuilder.append(" : ");<br /> strBuilder.append(spinnerTextView.getText());</p> <p> textView.setText(strBuilder);<br /> }</p> <p> @Override<br /> public void onNothingSelected(AdapterView<?> parent) {<br /> }<br /> };</p> <p> spinner.setOnItemSelectedListener(listener);<br /> }</p> <p> class SpinnerAdapter extends BaseAdapter {</p> <p> @Override<br /> public int getCount() {<br /> if(hobbyStrIds.length <= hobbyImgIds.length) {<br /> return hobbyStrIds.length;<br /> }<br /> return hobbyImgIds.length;<br /> }</p> <p> @Override<br /> public Object getItem(int position) {<br /> return null;<br /> }</p> <p> @Override<br /> public long getItemId(int position) {<br /> return 0;<br /> }</p> <p> @Override<br /> public View getView(int position, View convertView, ViewGroup parent) {<br /> LinearLayout linearLayout = new LinearLayout(SpinnerActivity.this);<br /> linearLayout.setOrientation(LinearLayout.HORIZONTAL);<br /> linearLayout.setBackgroundDrawable(getResources().getDrawable(R.drawable.bg));</p> <p> //设置小图标<br /> ImageView imageView = new ImageView(SpinnerActivity.this);<br /> imageView.setImageDrawable(getResources()<br /> .getDrawable(hobbyImgIds[position]));<br /> linearLayout.addView(imageView);</p> <p> //设置内容<br /> TextView textView = new TextView(SpinnerActivity.this);<br /> textView.setText(" " + getResources().getText(hobbyStrIds[position]));<br /> textView.setTextSize(24);<br /> textView.setTextColor(R.color.black);<br /> linearLayout.addView(textView);</p> <p> return linearLayout;<br /> }<br /> }<br /> }

第五步：

/SpinnerDemo/AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><br /> <manifest xmlns:android="http://schemas.android.com/apk/res/android"<br /> package="com.myspinner.demo"<br /> android:versionCode="1"<br /> android:versionName="1.0"><br /> <application android:icon="@drawable/icon" android:label="@string/app_name"><br /> <activity android:name=".SpinnerActivity"<br /> android:label="@string/app_name"><br /> <intent-filter><br /> <action android:name="android.intent.action.MAIN" /><br /> <category android:name="android.intent.category.LAUNCHER" /><br /> </intent-filter><br /> </activity></p> <p> </application><br /> <uses-sdk android:minSdkVersion="8" /></p> <p></manifest>

效果图：

                    未展开下拉列表前

                    展开下拉列表后

               选中下拉列表后(选中的是足球)

源码下载地址： http://download.csdn.net/source/3203345