问题

以下是您要翻译的内容：

对于我的应用程序，我正在使用一个可绘制资源文件创建一个启动屏幕，该文件包含一个图层列表，其中包括一个带有有色背景和居中的矢量可绘制图标的图层。

splash_screen.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:drawable="@color/grey_700" />
    <item
        android:drawable="@drawable/splash_foreground"
        android:gravity="center" />
</layer-list>

style.xml

...

<style name="Theme.SplashScreen" parent="Theme.MaterialComponents.DayNight.NoActionBar">
    <item name="android:statusBarColor">@color/grey_900</item>
    <item name="android:windowBackground">@drawable/splash_screen</item>
</style>

...

AndroidManifest.xml

...

<activity
    android:name=".MainActivity"
    android:exported="true"
    android:theme="@style/Theme.SplashScreen"
    android:screenOrientation="portrait"
    tools:ignore="LockedOrientationActivity">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />

        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

...

splash_foreground.xml

问题
输出应该显示splash_foreground在屏幕中居中显示，而背景颜色应在整个屏幕上裁剪，但实际上显示的是一个居中裁剪的启动屏幕。

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:drawable="@color/grey_700" />
    <item
        android:drawable="@drawable/splash_foreground"
        android:gravity="center" />
</layer-list>

...

<style name="Theme.SplashScreen" parent="Theme.MaterialComponents.DayNight.NoActionBar">
    <item name="android:statusBarColor">@color/grey_900</item>
    <item name="android:windowBackground">@drawable/splash_screen</item>
</style>

...

...

        <activity
            android:name=".MainActivity"
            android:exported="true"
            android:theme="@style/Theme.SplashScreen"
            android:screenOrientation="portrait"
            tools:ignore="LockedOrientationActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

...

答案1

得分: 1

I solved this problem by using the new splash_screen API. all thanks to this post

Solution

• Add Splash Screen API in build.gradle
implementation 'androidx.core:core-splashscreen:1.0.0'

• Add this line before the application tag in the AndroidManifest.xml file
  <uses-sdk tools:overrideLibrary="androidx.core.splashscreen" />

• In theme.xml & theme.xml (night) create a new style with Theme.SplashScreen being parent

        <item name="android:statusBarColor">@color/grey_900</item> 
        <item name="windowSplashScreenAnimatedIcon">@drawable/ic_app_foreground</item> 
        <item name="windowSplashScreenIconBackgroundColor">@color/grey_700</item> 
        <item name="windowSplashScreenBackground">@color/grey_700</item> 
        <item name="postSplashScreenTheme">@style/Theme.LGConnect</item> 
    </style> ```

- **Set application theme and Launcher Activity theme to the newly created style**
``` ...
<application
...
android:theme="@style/Theme.App.Starting"
...
<activity
...
android:theme="@style/Theme.App.Starting"
... ```

- **Inside `onCreate` method of `MainActivity` add this line**
``` ...
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
installSplashScreen()
... ```


[1]: https://stackoverflow.com/a/72320117/16177121

<details>
<summary>英文:</summary>

I solved this problem by using the new splash_screen API. all thanks to [this post][1]

## Solution ##
- **Add Splash Screen API in `build.gradle`**

implementation 'androidx.core:core-splashscreen:1.0.0'

- **Add this line before the application tag in the `AndroidManifest.xml` file**

<uses-sdk tools:overrideLibrary="androidx.core.splashscreen" />

- **In `theme.xml` & `theme.xml (night)` create a new style with `Theme.SplashScreen` being parent**

<style name="Theme.App.Starting" parent="Theme.SplashScreen">
<item name="android:statusBarColor">@color/grey_900</item>
<item name="windowSplashScreenAnimatedIcon">@drawable/ic_app_foreground</item>
<item name="windowSplashScreenIconBackgroundColor">@color/grey_700</item>
<item name="windowSplashScreenBackground">@color/grey_700</item>
<item name="postSplashScreenTheme">@style/Theme.LGConnect</item>
</style>

- **Set application theme and Launcher Activity theme to the newly created style**

...
<application
...
android:theme="@style/Theme.App.Starting"
...
<activity
...
android:theme="@style/Theme.App.Starting"
...

- **Inside `onCreate` method of `MainActivity` add this line**

...
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
installSplashScreen()
...

  [1]: https://stackoverflow.com/a/72320117/16177121

</details>