Android启动画面VectorDrawable


11

我想在我的初始屏幕中显示一个VectorDrawable

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:drawable="@android:color/white"
        android:gravity="fill" />

    <item
        android:drawable="@drawable/splash_screen"
        android:gravity="bottom|center" />
</layer-list>

我的SVG具有android:width="320dp"android:height="238dp"

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="320dp"
    android:height="238dp"
    android:viewportWidth="320"
    android:viewportHeight="238">
  <group>
    <clip-path android:pathData="M0,0h320v238h-320z M 0,0"/>
    <path
        android:pathData="M0,143.311a160,4.476 0,1 0,320 0a160,4.476 0,1 0,-320 0z"
        android:fillColor="#E6E6E6"/>
    <path
        android:pathData="M245.269,94.815C245.067,94.818 244.865,94.821 244.66,94.821C244.455,94.821 244.253,94.818 244.051,94.815C233.341,94.572 225.578,87.88 227.554,80.859L232.372,63.73L233.59,59.396L255.177,59.764L256.488,64.004L261.653,80.693C263.839,87.753 256.076,94.572 245.269,94.815Z"
        android:fillColor="#3F3D56"/>
    <path
        android:pathData="M256.488,64.004C248.993,68.288 239.768,68.184 232.372,63.73L233.59,59.396L255.177,59.764L256.488,64.004Z"
        android:strokeAlpha="0.2"
        android:fillColor="#000000"
        android:fillAlpha="0.2"/>
    <path
        android:pathData="M255.577,81.427C256.51,77.952 259.575,72.938 268.17,66.893C283.16,56.35 274.218,48.444 273.83,48.113C273.017,47.418 273.137,46.638 274.109,46.371C275.252,46.143 276.437,46.419 277.361,47.128C277.846,47.529 289.044,57.092 272.129,68.988C256.906,79.695 260.142,86.685 260.179,86.752C260.587,87.499 259.933,88.097 258.717,88.089C257.501,88.081 256.183,87.469 255.774,86.723C255.688,86.565 254.709,84.662 255.577,81.427Z"
        android:fillColor="#3F3D56"/>
    <path
        android:pathData="M234.697,97.312C234.036,97.312 233.403,97.049 232.935,96.582C232.468,96.115 232.206,95.481 232.206,94.821L232.206,84.027C232.206,82.652 233.321,81.537 234.697,81.537C236.072,81.537 237.187,82.652 237.187,84.027L237.187,94.821C237.187,95.481 236.925,96.115 236.458,96.582C235.991,97.049 235.357,97.312 234.697,97.312L234.697,97.312Z"
        android:fillColor="#3F3D56"/>
    <path
        android:pathData="M236.881,71.688C236.604,72.288 236.101,72.754 235.482,72.983C234.862,73.212 234.177,73.185 233.577,72.909L223.771,68.398C222.523,67.822 221.977,66.344 222.552,65.095C223.127,63.846 224.604,63.299 225.853,63.872L235.659,68.384C236.259,68.66 236.725,69.163 236.954,69.783C237.183,70.402 237.157,71.087 236.881,71.688L236.881,71.688Z"
        android:fillColor="#3F3D56"/>
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        android:pathData="M252.439,71.688C252.715,72.288 253.218,72.754 253.838,72.983C254.458,73.212 255.143,73.185 255.743,72.909L265.548,68.398C266.798,67.823 267.345,66.344 266.77,65.094C266.195,63.844 264.716,63.297 263.466,63.872L253.661,68.384C253.061,68.66 252.595,69.163 252.366,69.783C252.137,70.402 252.163,71.087 252.439,71.688Z"
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        android:fillColor="#3F3D56"/>
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        android:fillColor="#3F3D56"/>
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        android:pathData="M230.751,11.308C230.603,11.308 230.457,11.335 230.318,11.386C229.904,11.537 229.603,11.9 229.532,12.335L227.888,22.006C227.814,22.44 227.978,22.88 228.317,23.161C228.656,23.442 229.119,23.52 229.531,23.367L238.728,19.955C239.141,19.802 239.441,19.441 239.514,19.007C239.588,18.573 239.425,18.133 239.086,17.852L239.086,17.852L231.533,11.593C231.313,11.409 231.037,11.308 230.751,11.308Z"
        android:fillColor="#E6E6E6"/>
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        android:fillColor="#FF6584"/>
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        android:strokeAlpha="0.2"
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        android:fillAlpha="0.2"/>
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        android:pathData="M40.699,90.118m-3.239,0a3.239,3.239 0,1 1,6.479 0a3.239,3.239 0,1 1,-6.479 0"
        android:fillColor="#6C63FF"/>
    <path
        android:pathData="M104.765,162.103m-3.239,0a3.239,3.239 0,1 1,6.479 0a3.239,3.239 0,1 1,-6.479 0"
        android:fillColor="#6C63FF"/>
    <path
        android:pathData="M186.108,63.843m-3.239,0a3.239,3.239 0,1 1,6.479 0a3.239,3.239 0,1 1,-6.479 0"
        android:fillColor="#6C63FF"/>
    <path
        android:pathData="M281.488,159.223m-3.239,0a3.239,3.239 0,1 1,6.479 0a3.239,3.239 0,1 1,-6.479 0"
        android:fillColor="#6C63FF"/>
    <path
        android:pathData="M284.727,74.281m-3.239,0a3.239,3.239 0,1 1,6.479 0a3.239,3.239 0,1 1,-6.479 0"
        android:fillColor="#6C63FF"/>
    <path
        android:pathData="M243.696,132.589m-3.239,0a3.239,3.239 0,1 1,6.479 0a3.239,3.239 0,1 1,-6.479 0"
        android:fillColor="#6C63FF"/>
  </group>
</vector>

我在android 8(360dp x 640dp设备)上进行了测试,一切正常,但是在android 5.1.1(320dp x 480dp设备)中,它变形了,我的VectorDrawable填充了屏幕并松开了宽高比,该如何解决?

和主题

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
        <!-- Show a splash screen on the activity. Automatically removed when
             Flutter draws its first frame -->
        <item name="android:windowBackground">@drawable/launch_background</item>
    </style>
</resources>

@ManiKandan为什么要24dp ??我的SVG不是一个图标,而是一个很大的插图
WebMaster

@ManiKandan我更新了帖子并添加了完整矢量
WebMaster

我之前发布过它,第一个xml是我的初始布局,第二个xml是vector,第三个是主题
WebMaster

我遇到了同样的问题,请在这里查看我的答案stackoverflow.com/questions/50327633/…–
quealegriamasalegre

您也可以在下面
quealegriamasalegre

Answers:


6

VectorDrawable定义一个静态可绘制对象。与SVG格式相似​​,每个矢量图形都定义为树形层次结构,由路径和组对象组成。每个路径包含对象轮廓的几何形状,组包含用于转换的详细信息。

您可以使用SDP-可缩放的尺寸单位。

提供新尺寸单位的Android SDK-sdp(可缩放dp)。此尺寸单位随屏幕尺寸缩放。它可以帮助Android开发人员支持多个屏幕。

要将sdp添加到您的项目中(使用Android Studio和Gradle) build.gradle

dependencies {
  implementation 'com.intuit.sdp:sdp-android:1.0.6'
}

现在添加sdp而不是dp

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="@dimen/_300sdp"
    android:height="@dimen/_225sdp"
    android:viewportWidth="512"
    android:viewportHeight="512">

注意- 在布局中使用AppCompatImageView(With app:srcCompat)代替ImageView

 <android.support.v7.widget.AppCompatImageView //Or androidx.appcompat.widget.AppCompatImageView
    app:srcCompat="@drawable/your_svg"
    />

但是当以“正确”的方式实现启动屏幕时,imageview确实有帮助吗?无论如何,如果它在所有API上都保留了宽高比,我想它是
可行的

3

对于您需要将可绘制对象包装在位图周围的对象,此问题与API的21、22和23有关。您需要做的是创建两个版本的drawable layer-list,并将其中一个放入drawable-v22,将另一个放入drawable-v24,如果这些文件夹不存在,只需在res /中创建它们,并注意您需要设置项目进行查看以查看它们(请参见下图)。

对于v24,您只需使用您已经拥有的一个即可:

<?xml version="1.0" encoding="utf-8"?><layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item
    android:drawable="@android:color/white"
    android:gravity="fill" />

<item

    android:gravity="center"
    android:src="@drawable/splash_screen" >
</item>

</layer-list>

对于drawable-v21,请使用以下命令(请注意,由于某些原因,这些drawable不能在高于23的API上使用)

<?xml version="1.0" encoding="utf-8"?><layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item
    android:drawable="@android:color/white"
    android:gravity="fill" />

<item android:gravity="center">
    <bitmap
        android:gravity="center"
        android:src="@drawable/splash_screen" />
</item>

</layer-list>

然后,android将根据设备的API来获取第一资产或第二资产,然后您的启动画面在所有设备上都将很好看。

顺便说一句,这里是有关其他自定义项的文档,您不仅可以在设备API上实现,还可以在屏幕尺寸,分辨率等上实现。

在此处输入图片说明

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