PopupWindow封装-view上方显示和下方显示

本文主要是介绍PopupWindow封装-view上方显示和下方显示，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

开源地址：http://simple-quickactions.googlecode.com/svn/trunk

本地下载：http://download.csdn.net/detail/u011127787/5724159

package org.example.qberticus.quickactions;import android.content.Context;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.ViewGroup.LayoutParams;
import android.view.WindowManager;
import android.widget.PopupWindow;/*** This class does most of the work of wrapping the {@link PopupWindow} so it's simpler to use.* * @author qberticus* */
public class BetterPopupWindow {/**触发view**/protected final View anchor;private final PopupWindow window;/**PopupWindow的根view**/private View root;private Drawable background = null;private final WindowManager windowManager;/*** Create a BetterPopupWindow* * @param anchor*            the view that the BetterPopupWindow will be displaying 'from'*/public BetterPopupWindow(View anchor) {this.anchor = anchor;t

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