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>