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。
在你的BottomsheetDialogFragment类中添加这两个方法。
public void setDialogBorder(Dialog dialog) {
FrameLayout bottomSheet = (FrameLayout) dialog.getWindow().findViewById(android.support.design.R.id.design_bottom_sheet);
bottomSheet.setBackground(new ColorDrawable(Color.TRANSPARENT));
setMargins(bottomSheet, 10, 0, 10, 20);
}
private void setMargins(View view, int left, int top, int right, int bottom) {
if (view.getLayoutParams() instanceof ViewGroup.MarginLayoutParams) {
ViewGroup.MarginLayoutParams p = (ViewGroup.MarginLayoutParams) view.getLayoutParams();
p.setMargins(left, top, right, bottom);
view.requestLayout();
}
}
现在调用你的BottomsheetDialogFragment类的setupDialog()方法中的setDialogBorder(dialog)方法。
现在在可绘制文件夹中创建一个形状文件。
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners android:radius="20dp" />
<solid android:color="@color/white" />
<stroke
android:width="1dp"
android:color="@color/transparent" />
</shape>
现在在xml文件中设置父视图组对话框视图的背景。
android:background="@drawable/round_border_white"
完成了! !
在你的BottomsheetDialogFragment类中添加这两个方法。
public void setDialogBorder(Dialog dialog) {
FrameLayout bottomSheet = (FrameLayout) dialog.getWindow().findViewById(android.support.design.R.id.design_bottom_sheet);
bottomSheet.setBackground(new ColorDrawable(Color.TRANSPARENT));
setMargins(bottomSheet, 10, 0, 10, 20);
}
private void setMargins(View view, int left, int top, int right, int bottom) {
if (view.getLayoutParams() instanceof ViewGroup.MarginLayoutParams) {
ViewGroup.MarginLayoutParams p = (ViewGroup.MarginLayoutParams) view.getLayoutParams();
p.setMargins(left, top, right, bottom);
view.requestLayout();
}
}
现在调用你的BottomsheetDialogFragment类的setupDialog()方法中的setDialogBorder(dialog)方法。
现在在可绘制文件夹中创建一个形状文件。
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners android:radius="20dp" />
<solid android:color="@color/white" />
<stroke
android:width="1dp"
android:color="@color/transparent" />
</shape>
现在在xml文件中设置父视图组对话框视图的背景。
android:background="@drawable/round_border_white"
完成了! !
Koma Yip回答的另一个问题对我有用，你应该试试。
在drawable中创建一个xml，比如dialog_bg.xml
<？XML版本="1.0"编码="utf-8"?>
<形状xmlns: android = " http://schemas.android.com/apk/res/android " >
<固体android:颜色= " @color /白色" / >
<corners android:半径="30dp" />
<填充
android:左= " 10 dp”
android:顶级= " 10 dp”
android:对= " 10 dp”
android:底部= " 10 dp " / >
< / >形状
把这个放在你的布局XML根节点中:
将其设置为布局XML中的背景
android:背景= " @drawable / dialog_bg”
在onCreateView()中放入:
将对话框的背景设置为透明
dialog.getWindow()。setBackgroundDrawable(新ColorDrawable (Color.TRANSPARENT));
Create a shape drawable .. which we will use as background for bottom sheet .
Provide the appropriate value for radius of top left and right corner .
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners
android:topLeftRadius="24dp"
android:topRightRadius="24dp" />
<padding android:top="2dp" />
<solid android:color="@color/white" />
</shape>
Now create style for " Bottom sheet dialog fragment "
<style name="BottomSheet" parent="@style/Widget.Design.BottomSheet.Modal">
<item name="android:background">@drawable/drawable_bottomsheet_background</item>
</style>
<style name="BaseBottomSheetDialog" parent="@style/Theme.Design.Light.BottomSheetDialog">
<item name="android:windowIsFloating">false</item>
<item name="bottomSheetStyle">@style/BottomSheet</item>
</style>
<style name="BottomSheetDialogTheme" parent="BaseBottomSheetDialog" />
Now create a custom class that will extend BottomSheetDilogFragment ,where you provide your style .
open class CustomRoundBottomSheet : BottomSheetDialogFragment() {
override fun getTheme(): Int = R.style.BottomSheetDialogTheme
override fun onCreateDialog(savedInstanceState: Bundle?): Dialog = BottomSheetDialog(requireContext(), theme)
}
Now use this class wherever you want to have round corner bottom sheet .
eg
class BottomSheetSuccess : CustomRoundBottomSheet() {
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
return inflater.inflate(R.layout.bottomsheet_shopcreate_success, container, false)
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
}
}
如果你需要setFitContents=true，我尝试了通过钩子onStateChanged解决方案，但一旦对话框达到扩展状态，它就会从直角闪烁到圆角。这很烦人。
有一种替代的解决方案，它不会导致闪烁，不需要使用私有api，而且更易于阅读(恕我冒犯)。
查看BottomSheetBehavior的代码，我们发现:
/** True if Behavior has a non-null value for the @shapeAppearance attribute */
private boolean shapeThemingEnabled;
事实证明，如果形状主题被禁用，MaterialShapeDrawable将不会被使用。我们在BottomSheetBehavior.onLayout()中找到了这个:
// Only set MaterialShapeDrawable as background if shapeTheming is enabled, otherwise will
// default to android:background declared in styles or layout.
if (shapeThemingEnabled && materialShapeDrawable != null) {
ViewCompat.setBackground(child, materialShapeDrawable);
}
默认为android:background正是我们所需要的，因为这意味着完全控制如何渲染背景。
我们可以通过创建一个单独的样式来禁用材质主题，并将shapeAppearance和shapeAppearance overlay设置为null:
<style name="Theme.YourApp.NoShapeBottomSheetDialog" parent="Theme.MaterialComponents.BottomSheetDialog">
<item name="bottomSheetStyle">@style/Theme.YourApp.NoShapeButtonSheet</item>
</style>
<style name="Theme.YourApp.NoShapeButtonSheet" parent="Widget.MaterialComponents.BottomSheet.Modal">
<item name="shapeAppearance">@null</item>
<item name="shapeAppearanceOverlay">@null</item>
</style>
扩展BottomSheetDialogFragment和覆盖onCreateDialog:
public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
return new BottomSheetDialog(requireContext(),
R.style.Theme_Grupin_NoShapeBottomSheetDialog);
}
下面的表格现在是裸露的，没有任何背景。所以我们可以添加任何我们想要的背景，没有动画将被触发。
你必须改变底部的主题，以实现顶部圆形布局
创建一个自定义绘制background_bottom_sheet_dialog_fragment.xml:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners
android:topLeftRadius="8dp"
android:topRightRadius="8dp" />
<padding android:top="0dp" />
<solid android:color="@color/white" />
</shape>
然后在styles.xml上使用drawable作为背景覆盖bottomSheetDialogTheme:
<!--Bottom sheet-->
<style name="BottomSheet" parent="@style/Widget.Design.BottomSheet.Modal">
<item
name="android:background">@drawable/background_bottom_sheet_dialog_fragment
</item>
</style>
<style name="BaseBottomSheetDialog"
parent="@style/Theme.Design.Light.BottomSheetDialog">
<item name="android:windowIsFloating">false</item>
<item name="bottomSheetStyle">@style/BottomSheet</item>
</style>
<style name="BottomSheetDialogTheme" parent="BaseBottomSheetDialog" />
这将改变你的底页的背景布局
BottomSheetDialog
class SheetFragment() : BottomSheetDialogFragment() {
lateinit var binding: SheetFragmentBinding;
override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
val dialog = super.onCreateDialog(savedInstanceState) as BottomSheetDialog;
val view = View.inflate(context, R.layout.fragment_bottom_sheet, null);
binding = DataBindingUtil.bind(view)!!;
binding.viewModel = SheetFragmentVM();
dialog.setContentView(view);
var bottomSheetBehavior = BottomSheetBehavior.from(view.parent as View);
bottomSheetBehavior.setPeekHeight(BottomSheetBehavior.PEEK_HEIGHT_AUTO);
bottomSheetBehavior.setBottomSheetCallback(object :
BottomSheetBehavior.BottomSheetCallback() {
override fun onStateChanged(bottomSheet: View, newState: Int) {
if (BottomSheetBehavior.STATE_EXPANDED == newState) {
// do on STATE_EXPANDED
}
if (BottomSheetBehavior.STATE_COLLAPSED == newState) {
// do on STATE_COLLAPSED
}
if (BottomSheetBehavior.STATE_HIDDEN == newState) {
dismiss()
}
}
override fun onSlide(bottomSheet: View, slideOffset: Float) {
// do on slide
}
})
return dialog
}
