popupWindow弹窗+动画效果+背景变透明灰色（超简单）

废话少说 先上效果图

奥利给！

不是这种布局效果的可以自己写
popupWindow的布局:

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

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginLeft="@dimen/dp_20"
    android:layout_marginRight="@dimen/dp_20"
    android:background="@drawable/shape15"
    android:orientation="vertical">

    <TextView
        android:id="@+id/xj_pop"
        android:layout_width="match_parent"
        android:layout_height="@dimen/dp_50"
        android:gravity="center"
        android:text="@string/xj"
        android:textColor="@color/colorBlack"></TextView>

    <View
        android:layout_width="match_parent"
        android:layout_height="@dimen/dp_1"
        android:layout_marginLeft="@dimen/dp_20"
        android:layout_marginRight="@dimen/dp_20"
        android:background="@color/colorGray"></View>

    <TextView
        android:id="@+id/xc_pop"
        android:layout_width="match_parent"
        android:layout_height="@dimen/dp_50"
        android:gravity="center"
        android:text="@string/xc"
        android:textColor="@color/colorBlack"></TextView>
</LinearLayout>

<TextView
    android:id="@+id/cancel_pop"
    android:layout_width="match_parent"
    android:layout_height="@dimen/dp_50"
    android:layout_marginLeft="@dimen/dp_20"
    android:layout_marginTop="@dimen/dp_5"
    android:layout_marginRight="@dimen/dp_20"
    android:layout_marginBottom="@dimen/dp_5"
    android:background="@drawable/shape15"
    android:gravity="center"
    android:text="@string/cancel"
    android:textColor="@color/colorBlack"></TextView>

</LinearLayout>

自定义布局的popupWindow

				View inflater = LayoutInflater.from(this).inflate(R.layout.pop_layout, null);
                TextView xj_pop = inflater.findViewById(R.id.xj_pop);
                TextView xc_pop = inflater.findViewById(R.id.xc_pop);
                TextView cancel_pop = inflater.findViewById(R.id.cancel_pop);
                popupWindow = new PopupWindow(inflater, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
                popupWindow.setBackgroundDrawable(null);
                popupWindow.setAnimationStyle(R.style.PopAnimation);//动画效果
                popupWindow.setOutsideTouchable(true);
                popupWindow.setTouchable(true);
                popupWindow.setFocusable(true);
			// 设置背景颜色变暗
	                WindowManager.LayoutParams lp = getWindow().getAttributes();
	                lp.alpha = 0.7f;
	                getWindow().setAttributes(lp);
	                popupWindow.setOnDismissListener(new PopupWindow.OnDismissListener() {
	                    @Override
	                    public void onDismiss() {
	                        WindowManager.LayoutParams lp = getWindow().getAttributes();
	                        lp.alpha = 1f;
	                        getWindow().setAttributes(lp);
	                    }
	                });
	         /**
             *  POP的取消按钮
             */
            cancel_pop.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    popupWindow.dismiss();
                }
            });
            //popupWindow在屏幕下方展示
	      popupWindow.showAtLocation(view, Gravity.BOTTOM, 0, -50);//‘view’是点击事件方法里的

动画效果（在res文件夹下自己新建文件夹：anim）

//pop_cancel.xml

<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate android:fromYDelta="0" android:toYDelta="100%p" android:duration="500"/>
    <alpha android:fromAlpha="1.0" android:toAlpha="0" android:duration="500"/>
</set>

//pop_in.xml

<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate android:fromYDelta="100%p" android:toYDelta="0" android:duration="400"/>
    <alpha android:fromAlpha="0" android:toAlpha="1.0" android:duration="400"/>
</set>

最后在values文件夹下的style的页面里添加：

<!-- PopupWindow 的动画效果 -->
<style name="PopAnimation">
    <item name="android:windowExitAnimation">@anim/pop_cancel</item>
    <item name="android:windowEnterAnimation">@anim/pop_in</item>
</style>

OK 大功告成~

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