How do I change the theme of my app in android studio?

Question

我从下拉菜单中的设计部分更改主题，如材质暗、全息等。我需要在样式部分编写代码来更改主题？

Answer 1

AndroidStudio 仅显示您自己以编程方式在应用程序中应用该主题时的外观。

Answer 2

In res/values/styles.xml you can add following code to change theme:

<resources>
    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"> 
        <item name="windowNoTitle">true</item>
        <item name="android:colorPrimary">@color/colorPrimary</item>
        <item name="android:colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="android:colorAccent">@color/colorAccent</item>
        <item name="android:statusBarColor">@color/colorPrimaryDark</item>
        <item name="android:colorControlActivated">@color/colorPrimaryDark</item>
        <item name="android:colorControlHighlight">@color/colorPrimary</item>
        <item name="android:colorControlNormal">@color/colorPrimary</item>
        <item name="android:windowBackground">@color/colorBackground</item>
        
    </style>
</resources>

you can change theme by modifying parent attribute

Answer 3

您应该编辑应用程序清单并将android:theme属性添加到具有您想要的主题的应用程序或活动标签。

Answer 4

 public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_second);
   if(mode.equals("dark")){
     setTheme(android.R.style.DarkTheme);
   }else if(mode.equals("light")){
     setTheme(android.R.style.LightTheme);
   }else{
     setTheme(android.R.style.AppTheme);
   }
 }