我有一个自定义的bittomsheetdialogfragment，我想在底部视图的顶部有圆角
这是我的自定义类，它膨胀了我想要从底部显示的布局
View mView;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
mView = inflater.inflate(R.layout.charge_layout, container, false);
initChargeLayoutViews();
return mView;
}
我还有这个XML资源文件作为背景:
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle"
>
<corners android:topRightRadius="35dp"
android:topLeftRadius="35dp"
/>
<solid android:color="@color/white"/>
<padding android:top="10dp"
android:bottom="10dp"
android:right="16dp"
android:left="16dp"/>
</shape>
问题是，当我把这个资源文件设置为我的布局的根元素的背景，角仍然不是圆角。
我不能使用以下代码:
this.getDialog().getWindow().setBackgroundDrawableResource(R.drawable.charge_layout_background);
因为它覆盖了底部对话框的默认背景，底部视图上方不会有任何半透明的灰色。
简单的解决方案:
class TopRoundedCornersFragment : BottomSheetDialogFragment() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setStyle(STYLE_NORMAL, R.style.AppBottomSheetDialogTheme)
}
}
在styles.xml
<style name="BottomSheetStyle" parent="Widget.Design.BottomSheet.Modal">
<item name="android:background">@drawable/bottom_sheet_dialog_bg</item>
</style>
<style name="AppBottomSheetDialogTheme" parent="Theme.Design.Light.BottomSheetDialog">
<item name="bottomSheetStyle">@style/BottomSheetStyle</item>
</style>
最后，创建一个顶部圆角可绘制资源(bottom_sheet_dialog_bg.xml)
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="@android:color/white" />
<corners
android:topLeftRadius="4dp"
android:topRightRadius="4dp" />
</shape>
创建一个自定义绘制的rounded_dialog.xml:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="@android:color/white"/>
<corners android:topLeftRadius="16dp"
android:topRightRadius="16dp"/>
</shape>
然后在styles.xml上使用drawable作为背景覆盖bottomSheetDialogTheme:
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<item name="bottomSheetDialogTheme">@style/AppBottomSheetDialogTheme</item>
</style>
<style name="AppBottomSheetDialogTheme"
parent="Theme.Design.Light.BottomSheetDialog">
<item name="bottomSheetStyle">@style/AppModalStyle</item>
</style>
<style name="AppModalStyle"
parent="Widget.Design.BottomSheet.Modal">
<item name="android:background">@drawable/rounded_dialog</item>
</style>
这将改变你的应用程序的所有底部对话框。
如果您正在使用材质组件主题，您可以通过将背景颜色设置为透明，然后将布局的背景设置为四舍五入来覆盖BottomSheetDialog的默认行为。
<style name="Theme.MyApp" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
<!-- Customize your theme here. -->
<item name="bottomSheetDialogTheme">@style/BottomSheetDialog</item>
</style>
<style name="BottomSheetDialog" parent="ThemeOverlay.MaterialComponents.BottomSheetDialog">
<item name="bottomSheetStyle">@style/bottomSheetStyleWrapper</item>
</style>
<style name="bottomSheetStyleWrapper" parent="Widget.MaterialComponents.BottomSheet.Modal">
<item name="android:backgroundTint">@android:color/transparent</item>
</style>
rounded_corner.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:topLeftRadius="26dp"
android:topRightRadius="26dp"/>
</shape>
然后将形状应用到你的底部表格根布局的背景:
<?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="match_parent"
android:background="@drawable/rounded_corner">
<!--
other layout components
-->
</LinearLayout>
注意，如果你在底部表单布局中使用Webview这样的组件，你可能无法实现预期的圆角，因为Webview有一个默认的白色背景。在这种情况下，你可以像这样简单地删除背景:
webView.setBackgroundColor(0);
简单的解决方案:
class TopRoundedCornersFragment : BottomSheetDialogFragment() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setStyle(STYLE_NORMAL, R.style.AppBottomSheetDialogTheme)
}
}
在styles.xml
<style name="BottomSheetStyle" parent="Widget.Design.BottomSheet.Modal">
<item name="android:background">@drawable/bottom_sheet_dialog_bg</item>
</style>
<style name="AppBottomSheetDialogTheme" parent="Theme.Design.Light.BottomSheetDialog">
<item name="bottomSheetStyle">@style/BottomSheetStyle</item>
</style>
最后，创建一个顶部圆角可绘制资源(bottom_sheet_dialog_bg.xml)
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="@android:color/white" />
<corners
android:topLeftRadius="4dp"
android:topRightRadius="4dp" />
</shape>
setupDialog()是RestrictedApi。最简单的解决方案:1.3.0-beta01，不涉及主题:
res / drawable - bs_background:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners
android:topLeftRadius="16dp"
android:topRightRadius="16dp" />
<solid android:color="@color/dayNightBackground" />
</shape>
public class MyBsDialogFrag extends BottomSheetDialogFragment {
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
((View) view.getParent()).setBackgroundResource(R.drawable.bs_background);
}
}
