Android PopupWindow实现右侧、左侧和底部弹出菜单

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; 
   
 } 
} 

<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>

<?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> 

<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> 

<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> 

<?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> 

<?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>