Android - 在 onClick 上更改应用主题 [英] Android - Change app Theme on onClick

问题描述

我知道有一种方法可以在单击按钮时更改应用程序默认主题.Blackmart 的开发人员已经做到了.我已经在谷歌上搜索了 1000 页，但我发现这个(不起作用)

i know there is a way to change the app default theme on button click. Blackmart developers have done it. I’ve already searched Google like 1000 pages but i found just this (not working)

getApplication().setTheme(Theme.Holo)

因为我已经在 res/values/styles.xml 中创建了一个新样式，还有其他方法可以动态更改它吗?甚至重新启动应用程序?

As i already created a new style in res/values/styles.xml is there any other way to dynamically change it? Even rebooting the application?

推荐答案

以下博客可以解决您的问题:

Following blog can solve your problem:

http://mrbool.com/how-to-change-the-layout-theme-of-an-android-application/25837

复制博客代码以供快速参考:

Copying the blog code for quick reference:

假设您已经在 XML 文件中定义了以下三个主题 R.style.FirstTheme、R.style.SecondTheme 和 R.style.ThirdTheme

Assuming that you already defined following three themes in the XML file R.style.FirstTheme, R.style.SecondTheme and R.style.ThirdTheme

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
public class ChangeThemeActivity extends Activity implements OnClickListener
{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        Utils.onActivityCreateSetTheme(this);
        setContentView(R.layout.main);

                    findViewById(R.id.button1).setOnClickListener(this);
          findViewById(R.id.button2).setOnClickListener(this);
          findViewById(R.id.button3).setOnClickListener(this);
    }
     @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;
          }
     }
}

让我们在Utils"文件中编写以下代码:

Let us write the below code in the "Utils" file:

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;
          }
     }
}

希望能帮到你...

编辑 1:

以下是 AlertDialog 不采用自定义主题的原因:

following is the reason AlertDialog does not take custom theme:

Builder.create() 中的实现是:

Implementation in Builder.create() is:

public AlertDialog create() {
    final AlertDialog dialog = new AlertDialog(P.mContext);
    P.apply(dialog.mAlert);
    [...]
}

它调用 AlertDialog 的not-theme-aware"构造函数，如下所示:

which calls the "not-theme-aware" constructor of AlertDialog, which looks like this:

protected AlertDialog(Context context) {
    this(context, com.android.internal.R.style.Theme_Dialog_Alert);
}

AlertDialog 中有第二个构造函数用于更改主题:

There is a second constructor in AlertDialog for changing themes:

protected AlertDialog(Context context, int theme) {
    super(context, theme);
    [...]
}

Builder 只是不调用.

that the Builder just doesn't call.

查看以下帖子以获取更多相关修复..

Check out following post for more relevant fixes..

如何更改 AlertDialog 的主题

以下是投票最多的答案:

Following is the most voted answer:

  new AlertDialog.Builder(
  new ContextThemeWrapper(context, android.R.style.Theme_Dialog))

这篇关于Android - 在 onClick 上更改应用主题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！