如何更改 AlertDialog 的主题 [英] How to change theme for AlertDialog

问题描述

我想知道是否有人可以帮助我.我正在尝试创建一个自定义的 AlertDialog.为了做到这一点，我在styles.xml

I was wondering if someone could help me out. I am trying to create a custom AlertDialog. In order to do this, I added the following line of code in styles.xml

<resources>
 <style name="CustomAlertDialog" parent="android:Theme.Dialog.Alert">
  <item name="android:windowBackground">@drawable/color_panel_background</item>
 </style>
</resources>

• color_panel_background.9.png 位于 drawable 文件夹中.这也可以在 Android SDK res 文件夹中找到.

以下是主要活动.

package com.customdialog;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;

public class CustomDialog extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        this.setTheme(R.style.CustomAlertDialog);
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage("HELLO!");
        builder .setCancelable(false)
          .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
           public void onClick(DialogInterface dialog, int id) {
               //MyActivity.this.finish();
           }
       })
       .setNegativeButton("No", new DialogInterface.OnClickListener() {
           public void onClick(DialogInterface dialog, int id) {
               //dialog.cancel();
           }
       });

        AlertDialog alertdialog = builder.create();
        alertdialog.show();
    }
}

为了将主题应用于 AlertDialog，我必须将主题设置为当前上下文.

In order to apply the theme to an AlertDialog, I had to set the theme to the current context.

但是，我似乎无法让应用程序显示自定义的 AlertDialog.有人能帮我解决这个问题吗?

However, I just can't seem to get the app to show customized AlertDialog. Can anyone help me out with this?

推荐答案

在 Dialog.java (Android src) 中使用了 ContextThemeWrapper.因此，您可以复制这个想法并执行以下操作:

In Dialog.java (Android src) a ContextThemeWrapper is used. So you could copy the idea and do something like:

AlertDialog.Builder builder = new AlertDialog.Builder(new ContextThemeWrapper(this, R.style.AlertDialogCustom));

然后像你想要的那样设计:

And then style it like you want:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="AlertDialogCustom" parent="@android:style/Theme.Dialog">
        <item name="android:textColor">#00FF00</item>
        <item name="android:typeface">monospace</item>
        <item name="android:textSize">10sp</item>
    </style>
</resources>

这篇关于如何更改 AlertDialog 的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！