android 自定义spinner的下拉弹出窗口样式

package com.test.ui;

import android.app.Activity;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.PopupWindow;
import android.widget.Toast;

public class TestActivity extends Activity {
private Button but_menu;
private Button open_id;
private Button save_id;
View contentView;
private PopupWindow m_popupWindow;

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
init();
setListener();

}

private void init() {
contentView = getLayoutInflater().inflate(R.layout.popupmenu, null,
true);
but_menu = (Button) findViewById(R.id.but_menu);
open_id = (Button) contentView.findViewById(R.id.btn_popup_information);
save_id = (Button) contentView.findViewById(R.id.btn_popup_quote);
// PopupWindow弹出的窗口显示的view,第二和第三参数：分别表示此弹出窗口的大小
m_popupWindow = new PopupWindow(contentView, LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT, true);

m_popupWindow.setBackgroundDrawable(new BitmapDrawable());// 有了这句才可以点击返回（撤销）按钮dismiss()popwindow
m_popupWindow.setOutsideTouchable(true);
m_popupWindow.setAnimationStyle(R.style.PopupAnimation);
}

private void setListener() {
contentView.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
m_popupWindow.dismiss();
}
});
// m_popupWindow = new PopupWindow();
but_menu.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
try {
if (m_popupWindow.isShowing()) {

m_popupWindow.dismiss();
}
m_popupWindow.showAsDropDown(v);

} catch (Exception e) {
Toast.makeText(TestActivity.this, e.getMessage(),
Toast.LENGTH_SHORT);
}
}
});
open_id.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
m_popupWindow.dismiss();
Toast.makeText(TestActivity.this, "打开被触发", Toast.LENGTH_SHORT)
.show();
}

});
save_id.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
m_popupWindow.dismiss();
Toast.makeText(TestActivity.this, "保存被触发", Toast.LENGTH_SHORT)
.show();
}

});
}

public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
if (m_popupWindow != null && m_popupWindow.isShowing()) {
m_popupWindow.dismiss();
return true;
}
}
return super.onKeyDown(keyCode, event);
}
}

popupmenu.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/lin_main"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingRight="120dip" >

<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/popup_search"
android:orientation="vertical" >

<Button
android:id="@+id/btn_popup_information"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="@drawable/goods_bg"
android:text="打开"
android:textColor="#000000"
android:textSize="16sp" />

<Button
android:id="@+id/btn_popup_quote"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dip"
android:layout_weight="1"
android:background="@drawable/goods_bg"
android:text="保存"
android:textColor="#000000"
android:textSize="16sp" />

<Button
android:id="@+id/btn_popup_product"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dip"
android:layout_weight="1"
android:background="@drawable/goods_bg"
android:text="关于我们"
android:textColor="#000000"
android:textSize="16sp" />

<Button
android:id="@+id/btn_popup_buy"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dip"
android:layout_weight="1"
android:background="@drawable/shop_bg"
android:text="关闭"
android:textColor="#000000"
android:textSize="16sp" />
</LinearLayout>

</LinearLayout>

values/style.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>

<style name="PopupAnimation" parent="android:Animation">
<item name="android:windowEnterAnimation">@anim/popup_search_show</item>
<item name="android:windowExitAnimation">@anim/popup_search_hide</item>
</style>

</resources>

anim/popup_search_show.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/decelerate_interpolator">

<scale
android:duration="500"
android:fromXScale="1.0"
android:fromYScale="1.0"
android:pivotX="0.100000024%"
android:pivotY="0.0"
android:toXScale="0.0"
android:toYScale="0.0">
</scale>

</set>

anim/popup_search_hide.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/decelerate_interpolator" >

<scale
android:duration="500"
android:fromXScale="0.0"
android:fromYScale="0.0"
android:pivotX="0.100000024%"
android:pivotY="0.0"
android:toXScale="1.0"
android:toYScale="1.0" >
</scale>

</set>