Android對話方塊（四）PopupWindow

標籤：

主布局

<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:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.example.popupwindow.MainActivity"    android:id="@+id/main" >    <!-- 注意這裡要設定布局檔案的id為main,後面要調用到 -->    <!-- 定義按鈕和點擊事件 -->    <Button        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:layout_centerHorizontal="true"        android:layout_marginTop="135dp"        android:text="開啟PopupWindow"         android:onClick="openPopupWindow"        /></RelativeLayout>

Popup對話方塊布局

<?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:background="@drawable/aa" >    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="這是PopupWindow"         android:textSize="30dp"        android:textColor="#823627"/></LinearLayout>

package com.example.popupwindow;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.PopupWindow;public class MainActivity extends Activity {private PopupWindow popupWindow;private View parent;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);/* * 得到布局填充符getLayoutInflater()，也可通過系統服務getSystemService(name)得到 * inflate指定布局檔案的id */View contentView = getLayoutInflater().inflate(R.layout.popup_window, null);/* * 第一個參數:PopupWindow要顯示的介面 * 第二個參數:PopupWindow的寬 * 第三個參數:PopupWindow的高 */popupWindow = new PopupWindow(contentView, ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.WRAP_CONTENT);popupWindow.setFocusable(true);//讓小視窗取得焦點，不然怎麼點也不會有反應popupWindow.setBackgroundDrawable(new BitmapDrawable());        //點空白處關掉Popup視窗，在背景new一個位元影像對象就可以了parent = this.findViewById(R.id.main);//以上main為當前Activity對應的布局檔案}public void openPopupWindow(View v){         //顯示PopupWindow的方法要多個，可設定具體顯示位置方式popupWindow.showAtLocation(parent, Gravity.BOTTOM, 0, 0);}}

運行結果

點擊按鈕

Android對話方塊（四）PopupWindow