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如何在android的左上角和右下角创建圆角半径？像这样

阿迪

我的代码是


<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        tools:context=".MainActivity">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="300dp"
            android:background="@drawable/bg_layout">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true"
                android:layout_centerInParent="true"
                android:layout_margin="@dimen/twenty_sp"
                android:text="@string/sign_in"
                android:textColor="@color/colorWhite"
                android:textSize="@dimen/thirty_sp" />
        </RelativeLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@drawable/bg_layout_white"
            android:orientation="vertical">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical">

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_margin="@dimen/ten_sp"
                    android:orientation="vertical"
                    android:padding="@dimen/ten_sp">

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:gravity="left"
                        android:text="@string/phone_number"
                        android:textColor="@color/colorBlack" />

                    <LinearLayout
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_margin="@dimen/five_sp"
                        android:orientation="horizontal">

                        <Spinner
                            android:id="@+id/main_spinner_coutry"
                            android:layout_width="wrap_content"
                            android:layout_height="@dimen/fifty_sp"
                            android:entries="@array/country_code"
                            android:prompt="@array/country_code"
                            android:spinnerMode="dropdown" />

                        <AutoCompleteTextView
                            android:layout_width="match_parent"
                            android:layout_height="@dimen/fifty_sp"
                            android:background="@drawable/bg_edt"
                            android:digits="0123456789"
                            android:ems="10"
                            android:hint="@string/_9876543210"
                            android:imeOptions="actionGo"
                            android:inputType="phone"
                            android:maxLength="10" />
                    </LinearLayout>

                </LinearLayout>

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_margin="@dimen/ten_sp"
                    android:orientation="vertical"
                    android:padding="@dimen/ten_sp">

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:gravity="left"
                        android:text="@string/password"
                        android:textColor="@color/colorBlack" />

                    <EditText
                        android:layout_width="match_parent"
                        android:layout_height="@dimen/fifty_sp"
                        android:layout_margin="@dimen/five_sp"
                        android:background="@drawable/bg_edt"
                        android:hint="@string/_9876543210"
                        android:inputType="textPassword" />

                </LinearLayout>


            </LinearLayout>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="@dimen/ten_sp"
                android:orientation="vertical"
                android:padding="@dimen/ten_sp">

                <Button
                    android:id="@+id/main_btn_signin"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:background="@drawable/bg_btn"
                    android:padding="@dimen/ten_sp"
                    android:text="@string/sign_in"
                    android:textAllCaps="false"
                    android:textColor="@color/colorWhite"
                    android:layout_margin="@dimen/ten_sp"/>

                <TextView
                    android:layout_margin="@dimen/ten_sp"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:gravity="center"
                    android:padding="@dimen/ten_sp"
                    android:text="@string/forgot_password"
                    android:textColor="@color/colorAccent" />

            </LinearLayout>
        </LinearLayout>
    </LinearLayout>
</ScrollView>

背景可绘制是

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:padding="10dp"
    android:shape="rectangle">
    <solid android:color="@color/colorWhite" />
    <corners
        android:topRightRadius="30dp"
         />

</shape>

显示为图片我想在代码上方的左上角和右下角工作，但它只显示一个带有背景颜色的角，我尝试创建上面的图片，但它不能工作......

4

4 回答 4

0

您需要创建一个可绘制的形状

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#5089fa" />
<size
    android:width="82dp"
    android:height="82dp" />
<padding
    android:bottom="10dp"
    android:left="10dp"
    android:right="10dp"
    android:top="10dp" />
<corners
    android:bottomLeftRadius="0dp"
    android:bottomRightRadius="8dp"
    android:topLeftRadius="8dp"
    android:topRightRadius="0dp" />

将该可绘制形状设置为您的背景，它会产生如下结果：

奇数圆角

于 2020-07-07T09:42:20.370 回答
0

可绘制的形状是一个非常好的解决方案。您也可以稍微重构它并使用顶部小部件的左下角和第二个小部件的右上角。如果背景在顶部为白色，在其下方为紫色，则您将获得所需的结果，同时仅使用“正常”角半径属性。

于 2020-07-07T09:46:38.210 回答
0

使用材料组件库，您可以定义自定义CornerTreatment.
例如，您可以使用 aCardView并将 a 应用于它ShapeAppearanceModel。

<LinearLayout
    android:background="@color/colorPrimaryLight"
    android:clipChildren="false"
    android:clipToPadding="false"
    ..>

   <com.google.android.material.card.MaterialCardView
       android:id="@+id/card"
       app:cardCornerRadius="32dp"
       app:cardBackgroundColor="@color/colorPrimaryDark"
       ../>

</LinearLayout>

然后：

MaterialCardView cardView = findViewById(R.id.card);
        
cardView.setShapeAppearanceModel(cardView.getShapeAppearanceModel().toBuilder()
                .setTopLeftCorner(new CrazyCornerTreatment())
                .setBottomLeftCorner(CornerFamily.ROUNDED,0f)
                .setBottomRightCorner(CornerFamily.ROUNDED,0f)
                .build());

左上角可以定义为：

class CrazyCornerTreatment : CornerTreatment() {

    override fun getCornerPath(
            shapePath: ShapePath,
            angle: Float,
            interpolation: Float,
            radius: Float
    ) {

        val interpolatedRadius = radius * interpolation
        shapePath.reset(0f, -radius * interpolation, 270f,270 -angle)
        shapePath.addArc(
                0f,
                -2*interpolatedRadius,
                2*interpolatedRadius,
                0f,
                180f,
                 - angle)

    }
}

在此处输入图像描述

于 2020-07-07T10:38:57.273 回答
0

创建具有两种颜色（即白色和紫色）​​的可绘制背景

layout_background.xml

<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:bottom="300dp">
    <shape android:shape="rectangle" >
        <size android:height="300dp" />
        <solid android:color="#ffffff" />
    </shape>
</item>

<item android:top="300dp">
    <shape android:shape="rectangle" >
        <size android:height="50dp" />
        <solid android:color="##2d39a1" />
    </shape>
</item>

将此可绘制对象设置为布局的背景

 <?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/layout_background"
        android:orientation="vertical"
        tools:context=".MainActivity">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="300dp"
            android:background="@drawable/purple_background">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true"
                android:layout_centerInParent="true"
                android:layout_margin="@dimen/twenty_sp"
                android:text="@string/sign_in"
                android:textColor="@color/colorWhite"
                android:textSize="@dimen/thirty_sp" />
        </RelativeLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@drawable/white_background"
            android:orientation="vertical">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical">

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_margin="@dimen/ten_sp"
                    android:orientation="vertical"
                    android:padding="@dimen/ten_sp">

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:gravity="left"
                        android:text="@string/phone_number"
                        android:textColor="@color/colorBlack" />

                    <LinearLayout
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_margin="@dimen/five_sp"
                        android:orientation="horizontal">

                        <Spinner
                            android:id="@+id/main_spinner_coutry"
                            android:layout_width="wrap_content"
                            android:layout_height="@dimen/fifty_sp"
                            android:entries="@array/country_code"
                            android:prompt="@array/country_code"
                            android:spinnerMode="dropdown" />

                        <AutoCompleteTextView
                            android:layout_width="match_parent"
                            android:layout_height="@dimen/fifty_sp"
                            android:background="@drawable/bg_edt"
                            android:digits="0123456789"
                            android:ems="10"
                            android:hint="@string/_9876543210"
                            android:imeOptions="actionGo"
                            android:inputType="phone"
                            android:maxLength="10" />
                    </LinearLayout>

                </LinearLayout>

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_margin="@dimen/ten_sp"
                    android:orientation="vertical"
                    android:padding="@dimen/ten_sp">

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:gravity="left"
                        android:text="@string/password"
                        android:textColor="@color/colorBlack" />

                    <EditText
                        android:layout_width="match_parent"
                        android:layout_height="@dimen/fifty_sp"
                        android:layout_margin="@dimen/five_sp"
                        android:background="@drawable/bg_edt"
                        android:hint="@string/_9876543210"
                        android:inputType="textPassword" />

                </LinearLayout>


            </LinearLayout>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="@dimen/ten_sp"
                android:orientation="vertical"
                android:padding="@dimen/ten_sp">

                <Button
                    android:id="@+id/main_btn_signin"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:background="@drawable/bg_btn"
                    android:padding="@dimen/ten_sp"
                    android:text="@string/sign_in"
                    android:textAllCaps="false"
                    android:textColor="@color/colorWhite"
                    android:layout_margin="@dimen/ten_sp"/>

                <TextView
                    android:layout_margin="@dimen/ten_sp"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:gravity="center"
                    android:padding="@dimen/ten_sp"
                    android:text="@string/forgot_password"
                    android:textColor="@color/colorAccent" />

            </LinearLayout>
        </LinearLayout>
    </LinearLayout>
</ScrollView>

紫色背景.xml

    <?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:padding="10dp"
    android:shape="rectangle">
    <solid android:color="@color/colorPurple" />
    <corners
        android:bottomLeftRadius="30dp"
         />

</shape>

white_background.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:padding="10dp"
    android:shape="rectangle">
    <solid android:color="@color/colorWhite" />
    <corners
        android:topRightRadius="30dp"
         />

</shape>

如果背景不适合，请调整 layout_background.xml 文件中的高度。我希望你明白了。。

于 2020-07-07T10:59:03.387 回答