在android中绘制自定义可绘制形状

Question

我想在xml 布局中绘制一个自定义形状，如下所示：

我尝试在XML 中编写一些代码，但我不明白如何为这个阴影的轮廓赋予阴影效果。

我做了什么：

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:width="20dp"
        android:height="20dp"
        android:gravity="top|left">
        <rotate
            android:fromDegrees="45"
            android:pivotX="50%"
            android:pivotY="50%"
            android:toDegrees="45">
            <shape android:shape="rectangle">

                <corners android:bottomRightRadius="2dp"/>

                <gradient android:type="linear" android:angle="270" android:startColor="#ffffff" android:endColor="#ffffff"/>
            </shape>

        </rotate>
    </item>
    <item
        android:width="120dp"
        android:height="36dp"
        android:bottom="6dp">
        <shape android:shape="rectangle">

            <gradient
                android:angle="0"
                android:endColor="@color/color_white"
                android:startColor="@color/color_white"
                android:type="linear" />

            <corners android:radius="6dp" />

        </shape>

    </item>
</layer-list>

我得到的结果：

谁能建议我如何在上面提到的图片中给轮廓添加阴影？或任何其他解决方案，如 9 补丁图像。我怎样才能画出这样的 9 个补丁图像？

Answer 1

更好的方法 不要使用 layer-list

创建整个形状

• 使用它的主要缺点是您需要固定hight 和width 的shape

使用简单的方法，只需使用 layer-list 创建顶部箭头，然后使用以下示例

试试这个

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="5dp"
    android:orientation="vertical">

    <ImageView
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_marginStart="10dp"
        android:src="@drawable/test" />


    <LinearLayout
        android:id="@+id/rootView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@android:color/white"
        android:orientation="vertical">


        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="5dp"
            android:text=" Lorem ipsum dolor sit amet, consectetur adipiscing elit"
            android:textColor="@color/colorAccent" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="5dp"
            android:text=" Lorem ipsum dolor sit amet, consectetur adipiscing elit"
            android:textColor="@android:color/black" />


    </LinearLayout>


</LinearLayout>

@drawable/test"

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <rotate
            android:fromDegrees="45"
            android:pivotX="-40%"
            android:pivotY="87%"
            android:toDegrees="45">
            <shape android:shape="rectangle">
                <stroke
                    android:width="10dp"
                    android:color="@android:color/white" />
                <solid android:color="@android:color/white" />
            </shape>
        </rotate>
    </item>
</layer-list>

输出

Answer 2

你创建分层形状为

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:width="120dp"
        android:height="36dp"
        >
        <shape>
            <padding
                android:bottom="1dp"
                android:right="1dp"
                android:top="1dp" />

            <solid android:color="#20CCCCCC" />

            <corners android:radius="3dp" />
        </shape>
    </item>
    <item
        android:width="120dp"
        android:height="36dp"
        >
        <shape>
            <padding
                android:bottom="1dp"
                android:right="1dp"
                android:top="1dp" />

            <solid android:color="#30CCCCCC" />

            <corners android:radius="3dp" />
        </shape>
    </item>
    <item
        android:width="120dp"
        android:height="36dp"
        >
        <shape>
            <padding
                android:bottom="1dp"
                android:right="1dp"
                android:top="1dp" />

            <solid android:color="#50CCCCCC" />

            <corners android:radius="3dp" />
        </shape>
    </item>
    <item
        android:width="20dp"
        android:height="20dp"
        android:gravity="top|left">
        <rotate
            android:fromDegrees="45"
            android:pivotX="70%"
            android:pivotY="40%"
            android:toDegrees="45">
            <shape android:shape="rectangle">
                <gradient android:type="linear" android:angle="270" android:startColor="#05CCCCCC" android:endColor="#05CCCCCC"/>
            </shape>

        </rotate>
    </item>

    <item
        android:width="20dp"
        android:height="20dp"
        android:gravity="top|left">
        <rotate
            android:fromDegrees="45"
            android:pivotX="70%"
            android:pivotY="40%"
            android:toDegrees="45">
            <shape android:shape="rectangle">
                <gradient android:type="linear" android:angle="270" android:startColor="#20CCCCCC" android:endColor="#20CCCCCC"/>
            </shape>

        </rotate>
    </item>
    <item
        android:width="20dp"
        android:height="20dp"
        android:gravity="top|left">
        <rotate
            android:fromDegrees="45"
            android:pivotX="60%"
            android:pivotY="45%"
            android:toDegrees="45">
            <shape android:shape="rectangle">
                <gradient android:type="linear" android:angle="270" android:startColor="#30CCCCCC" android:endColor="#30CCCCCC"/>
            </shape>

        </rotate>
    </item>
    <item
        android:width="20dp"
        android:height="20dp"
        android:gravity="top|left">
        <rotate
            android:fromDegrees="45"
            android:pivotX="50%"
            android:pivotY="50%"
            android:toDegrees="45">
            <shape android:shape="rectangle">

                <corners android:bottomRightRadius="2dp"/>

                <gradient android:type="linear" android:angle="270" android:startColor="#ffffff" android:endColor="#ffffff"/>
            </shape>

        </rotate>
    </item>

    <item
        android:top="1dp"
        android:width="120dp"
        android:height="36dp"
        android:bottom="5dp">
        <shape android:shape="rectangle">
            <gradient
                android:endColor="@android:color/white"
                android:startColor="@android:color/white"
                android:type="linear" />
        </shape>
    </item>

</layer-list>

输出：

Answer 3

**Try this:**

> **if you remove corner then delete <corners android:radius="@dimen/dp_5"/>  this line.**


    <?xml version="1.0" encoding="utf-8"?>
    <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
        <item
            android:width="@dimen/dp_30"
            android:height="@dimen/font_20"
            android:gravity="top|left">
            <rotate
                android:fromDegrees="45"
                android:pivotX="60%"
                android:pivotY="80%"
                android:toDegrees="45">
                <shape android:shape="rectangle">

                    <corners android:bottomRightRadius="2dp"/>

                    <solid android:color="@color/white"/>
                </shape>

            </rotate>
        </item>
        <item
            android:width="120dp"
            android:height="36dp"
            android:bottom="6dp">
            <shape android:shape="rectangle">

                <corners android:radius="@dimen/dp_5"/>

                <solid android:color="@color/white"/>
            </shape>
        </item>
    </layer-list>

Answer 4

试试这个

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item
    android:width="121dp"
    android:height="37dp"
    android:bottom="5dp">
    <shape android:shape="rectangle">

        <stroke
            android:color="@color/lightgrey"
            android:width="1dp"/>

    </shape>

</item>
<item
    android:width="21dp"
    android:height="21dp"
    android:gravity="top|left">
    <rotate
        android:fromDegrees="45"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toDegrees="45">
        <shape android:shape="rectangle">
            <stroke
                android:color="@color/lightgrey"
                android:width="1dp"/>

            <corners android:bottomRightRadius="0dp"/>

            <gradient android:type="linear" android:angle="270" android:startColor="#ffffff" android:endColor="#ffffff"/>
        </shape>

    </rotate>
</item>
<item
    android:width="20dp"
    android:height="20dp"
    android:gravity="top|left">
    <rotate
        android:fromDegrees="45"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toDegrees="45">
        <shape android:shape="rectangle">

            <corners android:bottomRightRadius="2dp"/>

            <gradient android:type="linear" android:angle="270" android:startColor="#ffffff" android:endColor="#ffffff"/>
        </shape>

    </rotate>
</item>
<item
    android:width="120dp"
    android:height="36dp"
    android:bottom="6dp">
    <shape android:shape="rectangle">

        <gradient
            android:angle="0"
            android:endColor="@color/white"
            android:startColor="@color/white"
            android:type="linear" />

    </shape>

</item>
</layer-list>