【android开发】使用PopupWindow实现页面点击顶部弹出下拉菜单
没有太多花样,也没有很复杂的技术,就是简单的PopupWindow的使用,可以实现点击弹出一个自定义的view,view里可以随便设计,常用的可以放一个listview。
demo中我只是一个点击展示,简单的使用了fade in out的动画效果,也没有精美的图片资源,看着也丑,不过这么短的时间,让你掌握一个很好用的技术,可以自己扩展,不很好么?
废话不说了,直接上代码:
MainActivity.java
- public class MainActivity extends Activity implements OnClickListener {
- private PopupWindow popupwindow;
- private Button button;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- button = (Button) findViewById(R.id.button1);
- button.setOnClickListener(this);
- }
- @Override
- public void onClick(View v) {
- switch (v.getId()) {
- case R.id.button1:
- if (popupwindow != null&&popupwindow.isShowing()) {
- popupwindow.dismiss();
- return;
- } else {
- initmPopupWindowView();
- popupwindow.showAsDropDown(v, 0, 5);
- }
- break;
- default:
- break;
- }
- }
- public void initmPopupWindowView() {
- // // 获取自定义布局文件pop.xml的视图
- View customView = getLayoutInflater().inflate(R.layout.popview_item,
- null, false);
- // 创建PopupWindow实例,200,150分别是宽度和高度
- popupwindow = new PopupWindow(customView, 250, 280);
- // 设置动画效果 [R.style.AnimationFade 是自己事先定义好的]
- popupwindow.setAnimationStyle(R.style.AnimationFade);
- // 自定义view添加触摸事件
- customView.setOnTouchListener(new OnTouchListener() {
- @Override
- public boolean onTouch(View v, MotionEvent event) {
- if (popupwindow != null && popupwindow.isShowing()) {
- popupwindow.dismiss();
- popupwindow = null;
- }
- return false;
- }
- });
- /** 在这里可以实现自定义视图的功能 */
- Button btton2 = (Button) customView.findViewById(R.id.button2);
- Button btton3 = (Button) customView.findViewById(R.id.button3);
- Button btton4 = (Button) customView.findViewById(R.id.button4);
- btton2.setOnClickListener(this);
- btton3.setOnClickListener(this);
- btton4.setOnClickListener(this);
- }
- }
activity_main.xml
- <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:background="#000000"
- tools:context=".MainActivity" >
- <Button
- android:id="@+id/button1"
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:layout_alignParentLeft="true"
- android:layout_alignParentTop="true"
- android:gravity="center"
- android:background="#C0C0C0"
- android:text="点击下拉列表" />
- </RelativeLayout>
自定义view的xml
- <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:background="#C0C0C0" >
- <Button
- android:id="@+id/button2"
- android:layout_width="200dp"
- android:layout_height="wrap_content"
- android:layout_alignParentLeft="true"
- android:layout_alignParentTop="true"
- android:paddingRight="70dp"
- android:text="viviens" />
- <Button
- android:id="@+id/button3"
- android:layout_width="200dp"
- android:layout_height="wrap_content"
- android:layout_alignParentLeft="true"
- android:layout_below="@+id/button2"
- android:paddingRight="70dp"
- android:text="mryang" />
- <Button
- android:id="@+id/button4"
- android:layout_width="200dp"
- android:layout_height="wrap_content"
- android:layout_alignParentLeft="true"
- android:layout_below="@+id/button3"
- android:paddingRight="70dp"
- android:text="张晓达" />
- </RelativeLayout>
动画效果:
inputodown.xml 进入屏幕
- <?xml version="1.0" encoding="UTF-8"?>
- <set xmlns:android="http://schemas.android.com/apk/res/android" >
- <translate
- android:duration="500"
- android:fromYDelta="-100%"
- android:toYDelta="0" />
- </set>
outdowntoup.xml
- <?xml version="1.0" encoding="UTF-8"?>
- <set xmlns:android="http://schemas.android.com/apk/res/android" >
- <translate
- android:duration="500"
- android:fromYDelta="0"
- android:toYDelta="-100%" />
- </set>
styles.xml
- <style name="AnimationFade">
- <!-- PopupWindow左右弹出的效果 -->
- <item name="android:windowEnterAnimation">@anim/inuptodown</item>
- <item name="android:windowExitAnimation">@anim/outdowntoup</item>
- </style>
实现效果:
demo地址:
http://download.csdn.net/detail/mad1989/5518035