Android 启动画面 VectorDrawable
Android splash screen VectorDrawable
我想在启动画面中显示 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 有 android:width="320dp" 和 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"/>
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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"/>
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android:fillColor="#3F3D56"/>
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android:fillColor="#3F3D56"/>
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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"/>
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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）中测试一切正常，但在 android 5.1.1（320dp x 480dp 设备）中它变形了，我的 VectorDrawable 填充了屏幕并且松动了它的宽高比，我该如何解决？
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>
VectorDrawable defines a static drawable object. Similar to the SVG
format, each vector graphic is defined as a tree hierachy, which is
made up of path and group objects. Each path contains the geometry of
the object's outline and group contains details for transformation.
您可以使用 SDP - 可缩放尺寸单位。
An android SDK that provides a new size unit - sdp (scalable dp). This
size unit scales with the screen size. It can help Android developers
with supporting multiple screens.
将 sdp 添加到您的项目（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 - 使用 AppCompatImageView（使用 app:srcCompat）而不是 ImageView在你的布局中。
<android.support.v7.widget.AppCompatImageView //Or androidx.appcompat.widget.AppCompatImageView
app:srcCompat="@drawable/your_svg"
/>
这个问题与 API 的 21、22 和 23 有关，因为您需要将可绘制对象环绕位图。您需要做的是创建 2 个版本的可绘制图层列表，并将一个放入 drawable-v22，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查看投影以查看它们（见下图）。
对于 v24，您只需使用已有的版本即可：
<?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，您使用以下内容（请注意，出于某种原因，这些可绘制对象无法在 API 高于 23 的情况下工作）
<?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>
android 将根据设备的 API 获取第一个或第二个资产，然后您的闪屏在所有设备上看起来都很棒。
顺便说一句 here 是关于其他自定义的文档，您不仅可以在设备 API 上实现，还可以在屏幕尺寸、分辨率等方面实现。
我想在启动画面中显示 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 有 android:width="320dp" 和 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:fillColor="#3F3D56"/>
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android:fillColor="#3F3D56"/>
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android:fillColor="#3F3D56"/>
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android:fillColor="#E6E6E6"/>
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android:fillColor="#E6E6E6"/>
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android:fillColor="#FF6584"/>
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android:fillColor="#3F3D56"/>
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android:pathData="M173.142,94.822L173.142,89.545L146.754,89.545L146.754,89.875L146.754,94.822L146.754,137.372L146.754,142.65L152.032,142.65L173.142,142.65L173.142,137.372L152.032,137.372L152.032,94.822L173.142,94.822L173.142,94.822Z"
android:fillColor="#3F3D56"/>
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android:pathData="M186.006,89.545L186.006,142.65L212.393,142.65L212.393,89.545L186.006,89.545ZM207.116,137.372L191.283,137.372L191.283,94.823L207.116,94.823L207.116,137.372Z"
android:fillColor="#6C63FF"/>
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android:fillColor="#6C63FF"/>
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android:pathData="M120.602,54.125m-3.239,0a3.239,3.239 0,1 1,6.479 0a3.239,3.239 0,1 1,-6.479 0"
android:fillColor="#6C63FF"/>
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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"/>
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</group>
</vector>
我在 android 8（360dp x 640dp 设备）中测试一切正常，但在 android 5.1.1（320dp x 480dp 设备）中它变形了，我的 VectorDrawable 填充了屏幕并且松动了它的宽高比，我该如何解决？
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>
VectorDrawabledefines a static drawable object. Similar to the SVG format, each vector graphic is defined as a tree hierachy, which is made up of path and group objects. Each path contains the geometry of the object's outline and group contains details for transformation.
您可以使用 SDP - 可缩放尺寸单位。
An android SDK that provides a new size unit - sdp (scalable dp). This size unit scales with the screen size. It can help Android developers with supporting multiple screens.
将 sdp 添加到您的项目（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 - 使用 AppCompatImageView（使用 app:srcCompat）而不是 ImageView在你的布局中。
<android.support.v7.widget.AppCompatImageView //Or androidx.appcompat.widget.AppCompatImageView
app:srcCompat="@drawable/your_svg"
/>
这个问题与 API 的 21、22 和 23 有关，因为您需要将可绘制对象环绕位图。您需要做的是创建 2 个版本的可绘制图层列表，并将一个放入 drawable-v22，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查看投影以查看它们（见下图）。
对于 v24，您只需使用已有的版本即可：
<?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，您使用以下内容（请注意，出于某种原因，这些可绘制对象无法在 API 高于 23 的情况下工作）
<?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>
android 将根据设备的 API 获取第一个或第二个资产，然后您的闪屏在所有设备上看起来都很棒。
顺便说一句 here 是关于其他自定义的文档，您不仅可以在设备 API 上实现，还可以在屏幕尺寸、分辨率等方面实现。