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。
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>
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);
}
}
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);
这个答案只针对背景色设置为彩色的问题。透明后,设置一个绘图与圆形背景的布局。
没有一个答案能让我把背景色设置为“彩色”。透明的,除非重写setupDialog()解决方案:
@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);
...
((View) contentView.getParent()).setBackgroundColor(ContextCompat.getColor(getContext(), android.R.color.transparent));
}
但是你在这里为对话框设置的contentView不是你在onCreateView()中膨胀时在onViewCreated()中获得的视图。它打破了标准流程,所以可能会出现问题,比如你不能使用视图绑定- onViewCreated()中的Kotlin Android扩展
所以我稍微调整了一下设置onActivityCreated()的背景:
override fun onActivityCreated(savedInstanceState: Bundle?) {
super.onActivityCreated(savedInstanceState)
(view?.parent as View).setBackgroundColor(Color.TRANSPARENT)
}
希望这对遇到同样麻烦的人有所帮助
添加圆角形状,使其为你的根布局的背景
<?xml version="1.0" encoding="utf-8" ?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners
android:topLeftRadius="@dimen/padding_margin_16_dp"
android:topRightRadius="@dimen/padding_margin_16_dp" />
<solid android:color="@color/white" />
</shape>
在你的BottomSheetDialogFragment上使背景透明
override fun onActivityCreated(savedInstanceState: Bundle?) {
super.onActivityCreated(savedInstanceState)
(view?.parent as View).setBackgroundColor(Color.TRANSPARENT)
}
它的工作为约束布局,框架布局,线性布局,相对布局。
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。