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。
底部对话框设置了默认的白色背景色，这就是为什么角落是不可见的，为了显示它们，你需要通过覆盖底部对话框的风格使对话框的背景透明。
在res/values/styles/styles.xml中定义此样式
<style name="BottomSheetDialog" parent="Theme.Design.Light.BottomSheetDialog">
<item name="bottomSheetStyle">@style/bottomSheetStyleWrapper</item>
</style>
<style name="bottomSheetStyleWrapper" parent="Widget.Design.BottomSheet.Modal">
<item name="android:background">@android:color/transparent</item>
</style>
并将此样式设置为您的BottomSheetDialog
View view = getLayoutInflater().inflate(R.layout.chooser_bottom_sheet, null);
BottomSheetDialog dialog = new BottomSheetDialog(this,R.style.BottomSheetDialog); // Style here
dialog.setContentView(view);
dialog.show();
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>
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>
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。
创建一个自定义的圆角绘图，并将其设置为你的BottomSheetDialogFragment的布局根的背景
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="@color/colorPrimary" />
<corners
android:bottomLeftRadius="0dp"
android:bottomRightRadius="0dp"
android:topLeftRadius="12dp"
android:topRightRadius="12dp" />
</shape>
然后简单地将下面的代码添加到您的BottomSheetDialogFragment类
@Override
public void setupDialog(Dialog dialog, int style) {
super.setupDialog(dialog, style);
View contentView = View.inflate(getContext(),
R.layout.fragment_bottom_sheet, null);
dialog.setContentView(contentView);
CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) ((View) contentView.getParent())
.getLayoutParams();
CoordinatorLayout.Behavior behavior = params.getBehavior();
((View) contentView.getParent()).setBackgroundColor(ContextCompat.getColor(getContext(), android.R.color.transparent));
}
你甚至可以像下面这样使用参数来设置边距
params.setMargins(50, 0, 50, 0);
