如何旋转线的Andr​​oid XML？ [英] How rotate line in Android XML?

问题描述

我想绘制与XML的Andr​​oid应用程序的对角线，但它不工作。它只是简单地画一条水平线。

的main.xml

 ＆LT; RelativeLayout的的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
    的xmlns：工具=htt​​p://schemas.android.com/tool​​s
    机器人：layout_width =match_parent
    机器人：layout_height =match_parent
    机器人：paddingBottom会=@扪/ activity_vertical_margin
    机器人：以下属性来=@扪/ activity_horizo​​ntal_margin
    机器人：paddingRight =@扪/ activity_horizo​​ntal_margin
    机器人：paddingTop =@扪/ activity_vertical_margin
    工具：上下文=TestActivity。＆GT;

    ＆LT; RelativeLayout的
        机器人：layout_width =match_parent
        机器人：layout_height =match_parent
        机器人：layout_alignParentLeft =真
        机器人：layout_alignParentTop =真
        风格=@风格/ diagonalStyle＆GT;
    ＆LT; / RelativeLayout的＆GT;

＆LT; / RelativeLayout的＆GT;
 

styles.xml

 ＆LT;资源的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android＆GT;

    ＆LT;样式名称=diagonalStyle＆GT;
        ＆LT;项目名称=机器人：背景＆GT; @可绘制/背景＆LT; /项目＆GT;
    ＆LT; /风格＆GT;

＆LT; /资源＆GT;
 

background.xml

 ＆LT; XML版本=1.0编码=UTF-8＆GT？;
＆LT;层列表的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android＆GT;

    ＆LT;项目＆GT;
        ＆LT;旋转
            机器人：fromDegrees =0
            机器人：toDegrees =45
            机器人：pivotX =50％
            机器人：pivotY =50％＆GT;
            ＆LT;形状
                机器人：形状=行
                机器人：顶部=1dip＆GT;
                ＆LT;中风
                    机器人：宽=1dip
                    机器人：颜色=＃FF0000/＆GT;
            ＆LT; /形状＆GT;
        ＆LT; /旋转＆GT;
    ＆LT; /项目＆GT;

＆LT; /层列表＆gt;
 

解决方案

您真的只需要一个号码更改为得到它的工作。只是改变fromDegrees 45：

 ＆LT;项目＆GT;
    ＆LT;旋转
            机器人：fromDegrees =45
            机器人：toDegrees =45
            机器人：pivotX =50％
            机器人：pivotY =50％＆GT;
        ＆LT;形状
                机器人：形状=行
                机器人：顶部=1dip＆GT;
            ＆LT;中风
                    机器人：宽=1dip
                    机器人：颜色=＃FF0000/＆GT;
        ＆LT; /形状＆GT;
    ＆LT; /旋转＆GT;
＆LT; /项目＆GT;
 

在旋转绘制<一href="http://developer.android.com/reference/android/graphics/drawable/RotateDrawable.html">http://developer.android.com/reference/android/graphics/drawable/RotateDrawable.html

实际使用的物业动画格式为：<一href="http://developer.android.com/guide/topics/resources/animation-resource.html">http://developer.android.com/guide/topics/resources/animation-resource.html

而你是一个非动画对角线，你想让它开始了在45度，并最终在45度也

。所以他们两个设置为45是正常的。

I'm trying to draw a diagonal line in an Android app with the XML, but it is not working. It simply draws a horizontal line.

main.xml:

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".TestActivity" >

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" 
        style="@style/diagonalStyle">
    </RelativeLayout>

</RelativeLayout>

styles.xml:

<resources xmlns:android="http://schemas.android.com/apk/res/android">

    <style name="diagonalStyle">
        <item name="android:background">@drawable/background</item>
    </style>

</resources>

background.xml:

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

    <item>
        <rotate
            android:fromDegrees="0"
            android:toDegrees="45"
            android:pivotX="50%"
            android:pivotY="50%" >
            <shape
                android:shape="line"
                android:top="1dip" >
                <stroke
                    android:width="1dip"
                    android:color="#FF0000" />
            </shape>
        </rotate>
    </item>

</layer-list>

解决方案

You really only needed one number change to get it to work. Just Change the fromDegrees to 45:

<item>
    <rotate
            android:fromDegrees="45"
            android:toDegrees="45"
            android:pivotX="50%"
            android:pivotY="50%" >
        <shape
                android:shape="line"
                android:top="1dip" >
            <stroke
                    android:width="1dip"
                    android:color="#FF0000" />
        </shape>
    </rotate>
</item>

The rotate drawable http://developer.android.com/reference/android/graphics/drawable/RotateDrawable.html

actually uses the Property Animation format http://developer.android.com/guide/topics/resources/animation-resource.html

Whereas you are making a non-animating diagonal line, you want it to start out at 45 degrees, and end up at 45 degrees also. So setting them both to 45 is the norm.

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