Question

好的，我正在制作手机应用程序。我为我的对话框创建了一个函数，并在需要时调用该函数。

我希望能够更改对话窗口，即：不同的颜色和线条以及将文本分开的东西。

我已经浏览了整个互联网，我无法找到任何可以帮助我的东西。

这是我正在调用的函数....

public void userNameRequired(View view)
{
    AlertDialog.Builder builder = new AlerdDialog.Builder(this);
    TextView newMessage = new TextView(this);
    newMessage.setText(" User Name is Required to be between 7 and 20    caracters long.");
    newMesage.setGravity(Gravity.CENTER_HORIZONTAL);
    builder.setView(newMessage);

    TextView title = new TextView(this);
    title.setText("!! NOTICE !!");
    title.setGravity(Gravity.CENTER);
    title.setTextSize(28);
    title.setTextColor(Color.RED);

    builder.setCustomTitle(title);

    builder.setPositiveButton("Ok", new DialogInterface.OnClickListener()
    {
        public void onClick(DialogInterface dialog, int id)
        {

        }
    });

    builder.show();
}

Answer 1

如 pha 所述，您可以为警报对话框指定自定义主题：

How to change theme for AlertDialog

Answer 2

解决方案1：

打开colors.xml
定义这样的颜色：<color name="background_dark">#3F51B5</color>

在对话框中调用show()后，设置背景颜色如下：

builder.getWindow().setBackgroundDrawableResource(android.R.color.background_dark);

解决方案2：

定义自定义主题

//assuming you have `@color/White` and `@color/colorPrimaryDark` defined in `colors.xml`
<style name="AlertDialogCustom" parent="@android:style/Theme.Dialog">
    <item name="android:textColor">@color/White</item>
    <item name="android:textStyle">bold</item>
    <item name="android:headerDividersEnabled">true</item>
    <item name="android:typeface">normal</item>
    <item name="android:background">@color/colorPrimaryDark</item>
</style>

设置样式

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

所以，这就是你的代码应该是这样的：

    public void userNameRequired(View view)
    {
       AlertDialog.Builder builder = new AlerdDialog.Builder(new ContextThemeWrapper(this, R.style.AlertDialogCustom));
       TextView newMessage = new TextView(this);
       newMessage.setText(" User Name is Required to be between 7 and 20    caracters long.");
       newMesage.setGravity(Gravity.CENTER_HORIZONTAL);
       builder.setView(newMessage);

       TextView title = new TextView(this);
       title.setText("!! NOTICE !!");
       title.setGravity(Gravity.CENTER);
       title.setTextSize(28);
       title.setTextColor(Color.RED);

       builder.setCustomTitle(title);

       builder.setPositiveButton("Ok", new DialogInterface.OnClickListener()
       {
           public void onClick(DialogInterface dialog, int id)
           {

           }
       });

       builder.show();
    }

AlertDialog alertDialog = new AlertDialog.Builder(getContext(), R.style.MyDialogTheme)
        ...
        .create();

对话框背景

2 个答案: