PopupWindowFromBottom 从底部弹出popupwindow

自定义PopupWindowFromBottom

 public class PopupWindowFromBottom extends PopupWindow {

     public PopupWindowFromBottom(Context context, final View view) {
         super(context);
         LayoutInflater inflater = (LayoutInflater) context
                 .getSystemService(Context.LAYOUT_INFLATER_SERVICE);  

         //设置按钮监听
         //设置SelectPicPopupWindow的View
         this.setContentView(view);
         //设置SelectPicPopupWindow弹出窗体的宽
         this.setWidth(LayoutParams.FILL_PARENT);
         //设置SelectPicPopupWindow弹出窗体的高
         this.setHeight(LayoutParams.WRAP_CONTENT);
         //设置SelectPicPopupWindow弹出窗体可点击
         this.setFocusable(true);
         //设置SelectPicPopupWindow弹出窗体动画效果
         this.setAnimationStyle(R.style.PopupAnimation);
         //实例化一个ColorDrawable颜色为半透明
         ColorDrawable dw = new ColorDrawable(0xb0000000);
         //设置SelectPicPopupWindow弹出窗体的背景
         this.setBackgroundDrawable(dw);
         //mMenuView添加OnTouchListener监听判断获取触屏位置如果在选择框外面则销毁弹出框
         view.setOnTouchListener(new OnTouchListener() {

             public boolean onTouch(View v, MotionEvent event) {  

                 int height = view.findViewById(R.id.picker_cancel).getTop();
                 int y=(int) event.getY();
                 if(event.getAction()==MotionEvent.ACTION_UP){
                     if(y<height){
                         dismiss();
                     }
                 }
                 return true;
             }
         });  

     }  

 }

涉及到了动画

push_bottom_in.xml

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

<translate
    android:duration="200"
    android:fromYDelta="100%p"
    android:toYDelta="0"
    />
<alpha
    android:fromAlpha="0.0"
    android:toAlpha="1.0"
    android:duration="200"
    />
</set>

push_bottom_out.xml

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

    <translate
        android:duration="200"
        android:fromYDelta="0"
        android:toYDelta="50%p" />
 <alpha
    android:fromAlpha="1.0"
    android:toAlpha="0.0"
    android:duration="200"
    />
</set>

style.xml

 <style name="PopupAnimation" parent="android:Animation">
         <item name="android:windowEnterAnimation">@anim/push_bottom_in</item>
         <item name="android:windowExitAnimation">@anim/push_bottom_out</item>
     </style>

使用了

  if(!menuWindow.isShowing()){
            menuWindow.showAtLocation(mParentView, Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, 0); //设置layout在PopupWindow中显示的位置
        }