Question

我创建了一个像这样的PopupWindow：

PopupWindow popupWindow = new PopupWindow(LayoutInflater.from(this).inflate(R.layout.main_popup_navigation, null, false), ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
popupWindow.setWidth((int) this.getResources().getDimension(R.dimen.navigation_popup_width));
popupWindow.showAsDropDown(toolbar);

它工作正常，但它没有任何背景。弹出窗口的背景是完全透明的。

如何设置类似于PopupMenu的背景（窗口+阴影）或ThemeOverlay.AppCompat.Light主题的Spinner？谢谢。

Answer 1

微调器类型背景

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
    <shape android:shape="rectangle">
        <solid android:color="#CABBBBBB"/>
        <corners android:radius="2dp" />
    </shape>
</item>

<item
    android:left="0dp"
    android:right="0dp"
    android:top="0dp"
    android:bottom="2dp">
    <shape android:shape="rectangle">
        <solid android:color="@android:color/white"/>
        <corners android:radius="2dp" />
    </shape>
</item>
</layer-list>

设置背景

popupWindow.setBackgroundDrawable(ContextCompat.getDrawable(this, R.drawable.spinner_background));

Answer 2

<强> MainActivity.java

popupWindow.setBackgroundDrawable(this.getDrawable(R.drawable.main_bg_navigation));
popupWindow.setElevation(43);

<强> main_bg_navigation.xml

<?xml version="1.0" encoding="utf-8"?>

<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <solid android:color="@color/white"/>

    <corners android:radius="2dp"/>

</shape>

它成功了。：）

修改：白色值为＆＃34; fffafafa＆＃34;

Android：我的PopupWindow的背景是透明的

2 个答案: