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。
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);
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>
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));
首先，你应该创建一个可绘制的XML文件，其中包含一个顶部圆角的形状，任何你想要的名称。
我将其命名为bottom rounded_top_shape.xml
<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"
/>
然后在style.xml中添加这个
<style name="AppBottomSheetDialogTheme" parent="Theme.MaterialComponents.Light.BottomSheetDialog">
<item name="bottomSheetStyle">@style/AppModalStyle</item>
</style>
<style name="AppModalStyle" parent="Widget.Design.BottomSheet.Modal">
<item name="android:background">@drawable/rounded_top_shape</item>
</style>
然后在你的应用主题中添加如下所示的行
<style name="MyAppTheme" parent="Theme.MaterialComponents.Light.Bridge">
<!-- this line -->
<item name="bottomSheetDialogTheme">@style/AppBottomSheetDialogTheme</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);
}
...
}
