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
        }