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。
我今天也检查了同样的事情，是的，你是对的，下面的代码
this.getDialog().getWindow().setBackgroundDrawableResource(R.drawable.charge_layout_background);
这适用于片段背景，所以相反，你应该从对话框窗口获得底部表视图，并改变背景，这里是代码
@SuppressLint("RestrictedApi")
@Override
public void setupDialog(Dialog dialog, int style) {
super.setupDialog(dialog, style);
View rootView = getActivity().getLayoutInflater().inflate(R.layout.view_member_info,null,false);
unbinder = ButterKnife.bind(this, rootView);
adjustUIComponents();
dialog.setContentView(rootView);
FrameLayout bottomSheet = (FrameLayout) dialog.getWindow().findViewById(android.support.design.R.id.design_bottom_sheet);
bottomSheet.setBackgroundResource(R.drawable.container_background);
}
这里的底部是你想要改变的实际视图。
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);
正如在其他答案中指出的，当state为BottomSheetBehavior时。STATE_EXPANDED角将被压平。
你可以通过设置BottomSheetBehavior的peekHeight属性并使用自定义样式来克服这个问题。
abstract class BaseBottomSheetFragment : BottomSheetDialogFragment(){
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
if (state == BottomSheetBehavior.STATE_EXPANDED) {
val displayMetrics = DisplayMetrics()
requireActivity().windowManager!!.defaultDisplay!!.getMetrics(displayMetrics)
(dialog as BottomSheetDialog).behavior.peekHeight = displayMetrics.heightPixels
} else {
(dialog as BottomSheetDialog).behavior.state = state
}
}
override fun getTheme(): Int {
return R.style.CustomBottomSheetDialog
}
}
CustomBottomSheetDialog风格
<style name="CustomBottomSheetDialog" parent="@style/ThemeOverlay.MaterialComponents.BottomSheetDialog">
<item name="bottomSheetStyle">@style/CustomBottomSheet</item>
<item name="materialButtonStyle">@style/CustomMaterialButtonStyle</item>
</style>
<style name="CustomMaterialButtonStyle" parent="@style/Widget.MaterialComponents.Button">
<item name="cornerRadius">@dimen/dialog_bottom_radius</item>
</style>
<style name="CustomBottomSheet" parent="Widget.MaterialComponents.BottomSheet">
<item name="shapeAppearanceOverlay">@style/CustomShapeAppearanceBottomSheetDialog</item>
</style>
<style name="CustomShapeAppearanceBottomSheetDialog" parent="">
<item name="android:background">@android:color/transparent</item>
<item name="backgroundTint">@android:color/transparent</item>
<item name="cornerFamily">rounded</item>
<item name="cornerSizeTopRight">@dimen/dialog_bottom_radius</item>
<item name="cornerSizeTopLeft">@dimen/dialog_bottom_radius</item>
<item name="cornerSizeBottomRight">0dp</item>
<item name="cornerSizeBottomLeft">0dp</item>
</style>
创建一个名为rounded_corners_shape的形状
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners
android:topLeftRadius="8dp"
android:topRightRadius="8dp"/>
<solid android:color="@color/white"/>
</shape>
定义一个样式
<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_corners_shape</item>
</style>
在你的自定义BottomSheetDialogFragment上使用这种风格，它会工作的!
public class CustomDialogFragment extends BottomSheetDialogFragment {
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setStyle(STYLE_NORMAL, R.style. AppBottomSheetDialogTheme);
}
...
}
