PopupWindow实现右侧、左侧和底部弹出菜单

先上图，4张：

项目代码：http://download.csdn.net/download/jianfengwen/9124745 （需要2个分）

项目SDK是5.1，建议将代码拷到自己的工程中去

代码如下：

MainActivity类：

package com.example.popupleftmenu;

import android.app.Activity;
import android.content.Context;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup.LayoutParams;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.PopupWindow;
import android.widget.Toast;

public class MainActivity extends Activity {

	private Context context = null;
	private PopupWindow popupWindow;
	private int from = 0;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		context = this;
		setContentView(R.layout.activity_main);
		Button popLeftBtn = (Button)findViewById(R.id.pop_left_btn);
		Button popRightBtn = (Button)findViewById(R.id.pop_right_btn);
		Button popBottomBtn = (Button)findViewById(R.id.pop_bottom_btn);
		popLeftBtn.setOnClickListener(popClick);
		popRightBtn.setOnClickListener(popClick);
		popBottomBtn.setOnClickListener(popClick);
	}

	
	OnClickListener popClick = new OnClickListener() {
		
		@Override
		public void onClick(View v) {
			switch(v.getId()){
				case R.id.pop_left_btn:{
					from = Location.LEFT.ordinal();
					break;
				}
				case R.id.pop_right_btn:{
					from = Location.RIGHT.ordinal();
					break;
				}
				case R.id.pop_bottom_btn:{
					from = Location.BOTTOM.ordinal();
					break;
				}
			}
			
			//调用此方法，menu不会顶置
			//popupWindow.showAsDropDown(v);
			initPopupWindow();
			
		}
	};
	/** 
     * 添加新笔记时弹出的popWin关闭的事件，主要是为了将背景透明度改回来 
     * 
     */ 
	class popupDismissListener implements PopupWindow.OnDismissListener{

		@Override
		public void onDismiss() {
			backgroundAlpha(1f);
		}
		
	}
	
	
	protected void initPopupWindow(){
		View popupWindowView = getLayoutInflater().inflate(R.layout.pop, null);
		//内容，高度，宽度
		if(Location.BOTTOM.ordinal() == from){
			popupWindow = new PopupWindow(popupWindowView, LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT, true);
		}else{
			popupWindow = new PopupWindow(popupWindowView, LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT, true);
		}
		//动画效果
		if(Location.LEFT.ordinal() == from){
			popupWindow.setAnimationStyle(R.style.AnimationLeftFade);
		}else if(Location.RIGHT.ordinal() == from){
			popupWindow.setAnimationStyle(R.style.AnimationRightFade);
		}else if(Location.BOTTOM.ordinal() == from){
			popupWindow.setAnimationStyle(R.style.AnimationBottomFade);
		}
		//菜单背景色
		ColorDrawable dw = new ColorDrawable(0xffffffff);
		popupWindow.setBackgroundDrawable(dw);
		//宽度
		//popupWindow.setWidth(LayoutParams.WRAP_CONTENT); 
		//高度
		//popupWindow.setHeight(LayoutParams.FILL_PARENT);
		//显示位置
		if(Location.LEFT.ordinal() == from){
			popupWindow.showAtLocation(getLayoutInflater().inflate(R.layout.activity_main, null), Gravity.LEFT, 0, 500);
		}else if(Location.RIGHT.ordinal() == from){
			popupWindow.showAtLocation(getLayoutInflater().inflate(R.layout.activity_main, null), Gravity.RIGHT, 0, 500);
		}else if(Location.BOTTOM.ordinal() == from){
			popupWindow.showAtLocation(getLayoutInflater().inflate(R.layout.activity_main, null), Gravity.BOTTOM|Gravity.CENTER_HORIZONTAL, 0, 0);
		}
		//设置背景半透明
		backgroundAlpha(0.5f);
		//关闭事件
		popupWindow.setOnDismissListener(new popupDismissListener());
		
		popupWindowView.setOnTouchListener(new OnTouchListener() {
			
			@Override
			public boolean onTouch(View v, MotionEvent event) {
				/*if( popupWindow!=null && popupWindow.isShowing()){
					popupWindow.dismiss();
					popupWindow=null;
				}*/
				// 这里如果返回true的话，touch事件将被拦截
                // 拦截后 PopupWindow的onTouchEvent不被调用，这样点击外部区域无法dismiss
				return false;
			}
		});
		
		Button open = (Button)popupWindowView.findViewById(R.id.open);
		Button save = (Button)popupWindowView.findViewById(R.id.save);
		Button close = (Button)popupWindowView.findViewById(R.id.close);
		
		
		open.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				Toast.makeText(context, "Open", Toast.LENGTH_LONG).show();
				popupWindow.dismiss();
			}
		});
		
		save.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				Toast.makeText(context, "Open", Toast.LENGTH_LONG).show();
				popupWindow.dismiss();
			}
		});
		
		close.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				Toast.makeText(context, "Open", Toast.LENGTH_LONG).show();
				popupWindow.dismiss();
			}
		});
	}
	
	/**
	 * 设置添加屏幕的背景透明度
	 * @param bgAlpha
	 */
	public void backgroundAlpha(float bgAlpha)
	{
		WindowManager.LayoutParams lp = getWindow().getAttributes();
		lp.alpha = bgAlpha; //0.0-1.0
        getWindow().setAttributes(lp);
	}
	/**
	 * 菜单弹出方向
	 *
	 */
	public enum Location {

		LEFT,
		RIGHT,
		TOP,
		BOTTOM;
		
	}
}

两个布局文件：

1.activity_main.xml，就三个Button

2. pop.xml，也是三个Button，可以自己修改

strings.xml

弹出左侧菜单
	弹出右侧菜单
	弹出底部菜单
	打开 
	保存 
	关闭 

styles.xml

左边弹出菜单动画文件：

in_lefttoright.xml：从左边入

out_righttoleft.xml：从右边出

其他动画文件自己参考写，就是fromXDelta， fromYDelta， toXDelta和toYDelta使用