Android用PopupWindow实现弹出菜单实例
jopen
12年前
step1:新建项目PopWindow,并导入菜单项使用的图片到/res/drawable目录下
（项目总览图） 
（drawable目录截图）
step2:设置应用的UI界面
a.应用的总体界面，main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/main" > <Button android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/button" android:onClick="openPopWindow" /> </LinearLayout>
b.弹出菜单的界面，popwindow.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@drawable/rectangle"> <!-- 设置一个手绘的长方形背景 --> <GridView android:layout_width="fill_parent" android:layout_height="wrap_content" android:numColumns="4" android:horizontalSpacing="10dp" android:verticalSpacing="10dp" android:id="@+id/gridView" /> </LinearLayout>
其中的android:background="@drawable/rectangle"是引用rectangle.xml
<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"> <gradient android:startColor="#1DC9CD" android:endColor="#A2E0FB" android:angle="270" /> <padding android:left="2dp" android:top="2dp" android:right="2dp" android:bottom="2dp" /> </shape>
c.每个菜单项的界面，grid_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:gravity="center" > <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/imageView" /> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center" android:textSize="16sp" android:textColor="#000099" android:id="@+id/textView" /> </LinearLayout>
d:为菜单设置一个style，用于指定菜单弹出时和退出时的动画效果 styles.xml
<?xml version="1.0" encoding="utf-8"?> <resources> <style name="animation"> <item name="android:windowEnterAnimation">@anim/enter</item> <item name="android:windowExitAnimation">@anim/exit</item> </style> </resources>
其中enter.xml
<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android" android:shareInterpolator="false"> <translate android:fromYDelta="100%p" android:toYDelta="0" android:duration="500" /> <alpha android:fromAlpha="0.7" android:toAlpha="1.0" android:duration="300" /> </set>
exit.xml
<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android" android:shareInterpolator="false"> <translate android:fromYDelta="0" android:toYDelta="100%p" android:duration="2000" /> <alpha android:fromAlpha="1.0" android:toAlpha="0.5" android:duration="1000" /> </set>
step3:MainActivity.java
package cn.roco.popwindow; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import android.app.Activity; import android.graphics.drawable.BitmapDrawable; import android.os.Bundle; import android.view.Gravity; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.GridView; import android.widget.ListAdapter; import android.widget.PopupWindow; import android.widget.SimpleAdapter; public class MainActivity extends Activity { private PopupWindow popupWindow; private View parent; /**菜单弹出来时候的菜单项图案*/ private int[] images = { R.drawable.i1, R.drawable.i2, R.drawable.i3, R.drawable.i4, R.drawable.i5, R.drawable.i6, R.drawable.i7, R.drawable.i8 }; /**菜单弹出来时候的菜单项文字*/ private String[] names = { "搜索", "文件管理", "下载管理", "全屏", "网址", "书签", "加入书签", "分享页面" }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); /**PopupWindow的界面*/ View contentView = getLayoutInflater() .inflate(R.layout.popwindow, null); /**网格布局界面*/ GridView gridView = (GridView) contentView.findViewById(R.id.gridView); /**设置网格布局的适配器*/ gridView.setAdapter(getAdapter()); /**设置网格布局的菜单项点击时候的Listener*/ gridView.setOnItemClickListener(new ItemClickListener()); /**初始化PopupWindow*/ popupWindow = new PopupWindow(contentView, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); popupWindow.setFocusable(true);// 取得焦点 popupWindow.setBackgroundDrawable(new BitmapDrawable()); /**设置PopupWindow弹出和退出时候的动画效果*/ popupWindow.setAnimationStyle(R.style.animation); parent = this.findViewById(R.id.main); } private final class ItemClickListener implements OnItemClickListener{ @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { if (popupWindow.isShowing()) { popupWindow.dismiss();//关闭 } } } /**返回网格布局的适配器*/ private ListAdapter getAdapter() { List<HashMap<String, Object>> data = new ArrayList<HashMap<String, Object>>(); for (int i = 0; i < images.length; i++) { HashMap<String, Object> item = new HashMap<String, Object>(); item.put("image", images[i]); item.put("name", names[i]); data.add(item); } SimpleAdapter simpleAdapter = new SimpleAdapter(this, data, R.layout.grid_item, new String[] { "image", "name" }, new int[] { R.id.imageView, R.id.textView }); return simpleAdapter; } public void openPopWindow(View v) { /**设置PopupWindow弹出后的位置*/ popupWindow.showAtLocation(parent, Gravity.BOTTOM, 0, 0); } }step4:AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="cn.roco.popwindow" android:versionCode="1" android:versionName="1.0"> <uses-sdk android:minSdkVersion="8" /> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".MainActivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
step5:运行效果
