Question

我正在创建一个应用程序，我想要更改完整应用程序的主题。即如果我点击任何Button说更改主题，它应该更改主题w.r.t Application Context。

我试过

OnClickListener onClick = new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

                getApplicationContext().setTheme(R.style.AppTheme1);
                setContentView(R.layout.activity_main);


        }
    };

但这并没有反映出来。是否需要进行任何修改以便我可以更改Application Themes

添加styles.xml

<style name="AppBaseTheme" parent="android:Theme.Light">
        <!--
            Theme customizations available in newer API levels can go in
            res/values-vXX/styles.xml, while customizations related to
            backward-compatibility can go here.
        -->
    </style>

    <!-- Application theme. -->
    <style name="AppTheme" parent="AppBaseTheme">
        <!-- All customizations that are NOT specific to a particular API-level can go here. -->
        <item name="android:textColor">#ffffff</item>
    </style>

    <style name="AppTheme1" parent="AppBaseTheme">
        <!-- All customizations that are NOT specific to a particular API-level can go here. -->
        <item name="android:textColor">#000000</item>
    </style>

Answer 1

java如下

Utils.java

import android.app.Activity;
import android.content.Intent;
public class Utils
{
     private static int sTheme;
     public final static int THEME_DEFAULT = 0;
     public final static int THEME_WHITE = 1;
     public final static int THEME_BLUE = 2;
     /**
      * Set the theme of the Activity, and restart it by creating a new Activity of the same type.
      */
     public static void changeToTheme(Activity activity, int theme)
     {
          sTheme = theme;
          activity.finish();
activity.startActivity(new Intent(activity, activity.getClass()));
     }
     /** Set the theme of the activity, according to the configuration. */
     public static void onActivityCreateSetTheme(Activity activity)
     {
          switch (sTheme)
          {
          default:
          case THEME_DEFAULT:
              activity.setTheme(R.style.FirstTheme);
              break;
          case THEME_WHITE:
              activity.setTheme(R.style.SecondTheme);
              break;
          case THEME_BLUE:
              activity.setTheme(R.style.Thirdheme);
              break;
          }
     }
}

并按如下方式使用

Utils.changeToTheme(this, Utils.THEME_WHITE);

您可以按如下方式编写点击事件

@Override
     public void onClick(View v)
     {
          // TODO Auto-generated method stub
          switch (v.getId())
          {
          case R.id.button1:
          Utils.changeToTheme(this, Utils.THEME_DEFAULT);
          break;
          case R.id.button2:
          Utils.changeToTheme(this, Utils.THEME_WHITE);
          break;
          case R.id.button3:
          Utils.changeToTheme(this, Utils.THEME_BLUE);
          break;
          }
     }

您可以拥有如下主题样式

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="FirstTheme" >
        <item name="android:textColor">#FF0000</item>
    </style>
    <style name="SecondTheme" >
        <item name="android:textColor">#00FF00</item>
    </style>
    <style name="Thirdheme" >
        <item name="android:textColor">#0000F0</item>
    </style>
</resources>

有关完整示例，请访问http://mrbool.com/how-to-change-the-layout-theme-of-an-android-application/25837

改变完整应用的主题

1 个答案: