Android PopupWindow实现右侧、左侧和底部弹出菜单

本教程为大家分享了Android PopupWindow弹出菜单的具体代码，供大家参考，具体内容如下

项目代码：http://xiazai.jb51.net/201611/yuanma/PopupLeftMenu(jb51.net).rar

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

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:orientation="vertical"> 

 <Button
  android:id="@+id/pop_left_btn"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="@string/pop_left"/> 

 <Button
  android:id="@+id/pop_right_btn"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="@string/pop_right"/> 

 <Button
  android:id="@+id/pop_bottom_btn"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="@string/pop_bottom"/> 

</LinearLayout>

2. pop.xml，也是三个Button，可以自己修改

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:orientation="vertical" > 

 <!-- <LinearLayout
  android:layout_width="wrap_content"
  android:layout_height="fill_parent"
  android:orientation="vertical"
  android:background="#ffffff"> --> 

  <Button android:id="@+id/open"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="@string/open"/> 

  <Button android:id="@+id/save"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="@string/save"/> 

  <Button android:id="@+id/close"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="@string/close"/> 

 <!-- </LinearLayout> --> 

</LinearLayout> 

strings.xml

<string name="pop_left">弹出左侧菜单</string>
 <string name="pop_right">弹出右侧菜单</string>
 <string name="pop_bottom">弹出底部菜单</string>
 <string name="open">打开</string>
 <string name="save">保存</string>
 <string name="close">关闭</string>

styles.xml

<style name="AnimationLeftFade">
  <item name="android:windowEnterAnimation">@anim/in_lefttoright</item>
  <item name="android:windowExitAnimation">@anim/out_righttoleft</item>
 </style> 

 <style name="AnimationRightFade">
  <item name="android:windowEnterAnimation">@anim/in_righttoleft</item>
  <item name="android:windowExitAnimation">@anim/out_lefttoright</item>
 </style> 

 <style name="AnimationBottomFade">
  <item name="android:windowEnterAnimation">@anim/in_bottomtotop</item>
  <item name="android:windowExitAnimation">@anim/out_toptobottom</item>
 </style>

左边弹出菜单动画文件：

in_lefttoright.xml：从左边入

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"> 

 <translate
  android:fromXDelta="-100%"
  android:toXDelta="0"
  android:duration="500"/> 

</set>

out_righttoleft.xml：从右边出

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"> 

 <translate android:fromXDelta="0"
  android:toXDelta="-100%"
  android:duration="500"/> 

</set>

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

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