Android 自定义Spinner和下拉窗口

第一步：在布局文件中，添加Spinner控件

<?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="vertical" >

<Spinner
android:id="@+id/spinner"
style="@style/spinner"
android:dropDownHorizontalOffset="1dp"
android:dropDownVerticalOffset="1dp"
android:spinnerMode="dropdown" />

</LinearLayout>

在styles.xml文件，添加样式

<!-- 下拉列表的样式 -->
<style name="spinner">
<item name="android:layout_width">180dp</item>
<item name="android:layout_height">32dp</item>
<item name="android:paddingLeft">3dp</item>
<item name="android:layout_marginLeft">5dp</item>
<item name="android:textColor">@color/vote_text_color</item>
<item name="android:background">@drawable/spinner_selector</item>
<!-- <item name="android:layout_span">2</item> -->
</style>

添加背景选择器spinner_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/spinner_down" android:state_pressed="true"/>
<item android:drawable="@drawable/spinner_normal" android:state_pressed="false"/>
</selector>

第二步：创建一个Xml文件，进行编写下拉窗口的样式，名为simple_spinner_item.xml

<?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="vertical"
android:padding="15dp"
android:background="@drawable/spinner_bg_selector"
>
<TextView
android:id="@+id/spinner_item_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:textSize="17sp" />
</LinearLayout>

创建spinner_bg_selector.xml背景选择器

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="@color/gray" android:state_pressed="true"/>
<item android:drawable="@color/white" android:state_pressed="false"/>
</selector>

第三步：在Activity文件中，对Spinner进行初始化及设置

package com.example.demo;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.TextView;

public class ZidingyiActivity extends Activity {
private Spinner spinner;
public static String[] MODE = new String[] { "计划", "临时","aa","bb" };
private String modeString = "";

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_zidingyi);
initView();
}

private void initView() {
spinner = (Spinner) findViewById(R.id.spinner);
initSpinner(MODE, spinner);
}

public void initSpinner(String[] item, Spinner spinner) {
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item,MODE) {
@Override
public View getDropDownView(int position, View convertView,
ViewGroup parent) {
View view = convertView.inflate(getContext(), R.layout.spinner_item_layout,
null);
TextView label = (TextView) view
.findViewById(R.id.spinner_item_label);
label.setText(MODE[position]);
return view;
}
};
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {

@Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
switch (parent.getId()) {
case R.id.spinner:
modeString = MODE[position];
break;
}
}

@Override
public void onNothingSelected(AdapterView<?> arg0) {

}
});
}
}

相关文章：http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2015/0105/2264.html