基于一天时间的初始屏幕

Question

是否有可能有一个不同的启动屏幕的基础上一天的时间。我尝试创建values-night/styles.xml和values-notnight/styles.xml，以及具有相同命名图像的drawable-night和drawable-notnight，但它不会根据手机的时间进行交替。

我是不是漏掉了一个设置步骤？

values-notnight/styles.xml

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
        <item name="android:windowBackground">@drawable/metalic</item>

    </style>
    <style name="AppTheme.Launcher">
        <item name="android:windowBackground">@drawable/launch_screen</item>
        <!-- Optional, on Android 5+ you can modify the colorPrimaryDark color to match the windowBackground color for further branding-->
        <!-- <item name="colorPrimaryDark">@android:color/white</item> -->
    </style>
    <style name="AppTheme.NoActionBar">
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
    </style>

    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />

    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />

</resources>

values-notnight/styles.xml

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
    <item name="android:windowBackground">@drawable/carbon</item>

</style>
<style name="AppTheme.Launcher">
    <item name="android:windowBackground">@drawable/launch_screen</item>
    <!-- Optional, on Android 5+ you can modify the colorPrimaryDark color to match the windowBackground color for further branding-->
    <!-- <item name="colorPrimaryDark">@android:color/white</item> -->
</style>
<style name="AppTheme.NoActionBar">
    <item name="windowActionBar">false</item>
    <item name="windowNoTitle">true</item>
</style>

<style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />

<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />

drawable-notnight/launch_screen.xml

<!-- The background color, preferably the same as your normal theme -->
<item android:drawable="@drawable/carbon"/>
<!-- Your product logo - 144dp color version of your app icon -->
<item>
    <bitmap

        android:src="@drawable/logo"
        android:gravity="center"
        android:scaleGravity="center_vertical|center_horizontal"
        android:scaleHeight="60%"
        android:scaleWidth="60%"/>


</item>

drawable-night/launch_screen.xml

<!-- The background color, preferably the same as your normal theme -->
<item android:drawable="@drawable/metalic"/>
<!-- Your product logo - 144dp color version of your app icon -->
<item>
    <bitmap

        android:src="@drawable/logo"
        android:gravity="center"
        android:scaleGravity="center_vertical|center_horizontal"
        android:scaleHeight="60%"
        android:scaleWidth="60%"/>


</item>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.root.myapplication">
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-feature android:name="android.hardware.camera" />
    <application
        android:allowBackup="true"
        android:icon="@drawable/tech"
        android:label="@string/app_name"
        android:roundIcon="@drawable/tech"
        android:supportsRtl="true"
        android:theme="@style/AppTheme.Launcher">
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            android:theme="@style/AppTheme.Launcher">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

Answer 1

你必须做的三件事

第一：对于白天，文件夹名为values，对于晚上，文件夹名为values-night。相应地，Drawable和drawable-night。

第二：使用theme.appcompat.Daynight.DarkActionBar作为父主题。

第三：在布局中使用ViewFlipper

在代码中查找当前时间并与预期时间进行检查：

  ViewFlipper vf = (ViewFlipper) findViewById( R.id.viewFlipper );
  if (mCurrentTime == //whatever time you want) {
        vf.showNext();
  }