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。
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);
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
}
我找到了一个简单的解决办法。
使用com.google.android.material:material:1.6.1
class MyBottomSheet: BottomSheetDialogFragment() {
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
disableShapeAnimation()
}
@SuppressLint("RestrictedApi", "VisibleForTests")
private fun disableShapeAnimation() {
try {
val dlg = dialog as BottomSheetDialog
dlg.behavior.disableShapeAnimations()
} catch (ex: Exception) {
Log.e("BaseBottomSheet", "disableShapeAnimation Exception:", ex)
}
}
}
步骤1:
创建一个命名为rounded_background.xml的res/drawable:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners
android:topLeftRadius="32dp"
android:topRightRadius="32dp" />
<solid android:color="#D81B60" />
</shape>
步骤2:
创建这个样式来删除对话框背景:
<style name="NoBackgroundDialogTheme" parent="Theme.AppCompat.Light.Dialog">
<item name="android:windowBackground">@null</item>
</style>
步骤3:
使用setBackgroundResource()将可绘制对象设置为对话框的根视图，并通过覆盖getTheme()方法设置样式
Java:
public class MyDialogFragment extends BottomSheetDialogFragment {
@Override
public int getTheme() {
return R.style.NoBackgroundDialogTheme;
}
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = View.inflate(requireContext(), R.layout.bottom_sheet_profile, null);
view.setBackgroundResource(R.drawable.rounded_background);
return view;
}
}
科特林：
class MyDialogFragment : BottomSheetDialogFragment() {
override fun getTheme() = R.style.NoBackgroundDialogTheme
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View {
val view: View = View.inflate(requireContext(), R.layout.bottom_sheet_profile, null)
view.setBackgroundResource(R.drawable.rounded_background)
return view
}
}
结果:
如果(view.setBackgroundResource(R.drawable.rounded_background))这一行不能工作，然后尝试设置片段的Xml格式的背景。
完整的解决方案:
将下面的样式属性添加到style.xml。
<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/bottom_sheet_background</item>
</style>
然后使用AppBottomSheetDialogTheme从您的代码创建一个底部表对话框。
private fun openBottomSheetTermsCondition() {
val mBottomSheetDialog = BottomSheetDialog(requireContext(),R.style.AppBottomSheetDialogTheme)
val sheetView = layoutInflater.inflate(R.layout.bottom_sheet_travel_advice_terms, null)
mBottomSheetDialog.setContentView(sheetView)
sheetView.tv_head.setOnClickListener {
mBottomSheetDialog.dismiss()
}
sheetView.webView.loadDataWithBaseURL(null,getString(R.string.privacy_policy_body_html),"text/html", "utf-8", null)
mBottomSheetDialog.show()
}
我使用下面的绘图来圆底稿背景。
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners
android:topLeftRadius="@dimen/bottom_sheet_corner_radius"
android:topRightRadius="@dimen/bottom_sheet_corner_radius" />
<solid android:color="@color/white" />
</shape>
底部表格xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:behavior_hideable="false"
app:behavior_peekHeight="@dimen/bottom_sheet_peek_height"
app:cardCornerRadius="@dimen/spacing_normal"
app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/spacing_small">
<androidx.constraintlayout.widget.Guideline
android:id="@+id/begin_horizontal_guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_begin="@dimen/activity_vertical_margin" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/begin_vertical_guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_begin="@dimen/activity_horizontal_margin" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/end_vertical_guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_end="@dimen/activity_horizontal_margin" />
<View
android:id="@+id/sheet_header_shadow"
android:layout_width="match_parent"
android:layout_height="@dimen/spacing_tiny"
android:layout_marginStart="10dp"
android:layout_marginEnd="10dp"
android:background="@drawable/bottom_sheet_header_shadow"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.appcompat.widget.AppCompatTextView
android:id="@+id/tv_head"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:drawablePadding="@dimen/spacing_normal"
android:fontFamily="sans-serif-medium"
android:gravity="start"
android:padding="@dimen/spacing_small"
android:text="@string/term_and_condition"
android:textColor="@color/greyish_brown"
android:textSize="20sp"
app:drawableLeftCompat="@drawable/ic_close_black_24dp"
app:layout_constraintEnd_toEndOf="@id/end_vertical_guideline"
app:layout_constraintStart_toStartOf="@id/begin_vertical_guideline"
app:layout_constraintTop_toBottomOf="@+id/begin_horizontal_guideline" />
<View
android:id="@+id/line_separation"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginTop="@dimen/spacing_small"
android:background="@color/blue_gray"
app:layout_constraintTop_toBottomOf="@+id/tv_head" />
<WebView
android:id="@+id/webView"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="@id/end_vertical_guideline"
app:layout_constraintStart_toStartOf="@id/begin_vertical_guideline"
app:layout_constraintTop_toBottomOf="@id/line_separation" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
