AlertDialog和DialogPreference

Question

我在警报对话框中有此功能，效果很好

 ContextThemeWrapper ctw = new ContextThemeWrapper( MvcnContactList.this, R.style.MyTheme );
                alertDialogBuilder = new AlertDialog.Builder(ctw);
//set some views and onclick listeners
                alertDialog = alertDialogBuilder.create();
                alertDialog.setCancelable(false);
                alertDialog.show();

但是我有一个关于首选项对话框，并且我希望该对话框具有与我的警报对话框相同的阶梯。 但是我不知道将这种样式应用于对话框很热

public class About extends DialogPreference {
    public AboutDialog(Context oContext, AttributeSet attrs)
    {
        super(oContext, attrs); 
    }
}

注意：我将android：style =“ @ style / impex_dialog”放在我的pref.xml文件中，并且无法识别此样式标签。

Answer 1

警报对话框使用：

com.android.internal.R.style.Theme_Dialog_Alert

从Android来源：

protected AlertDialog(Context context, boolean cancelable, OnCancelListener cancelListener) {
    super(context, com.android.internal.R.style.Theme_Dialog_Alert);
    setCancelable(cancelable);
    setOnCancelListener(cancelListener);
    mAlert = new AlertController(context, this, getWindow());
}

所以我想您应该尝试这样的事情，因为它在themes.xml定义：

<!-- Default theme for alert dialog windows, which is used by the
        {@link android.app.AlertDialog} class.  This is basically a dialog
         but sets the background to empty so it can do two-tone backgrounds. -->
<style name="Theme.Dialog.Alert" parent="@android:style/Theme.Dialog">
    <item name="windowBackground">@android:color/transparent</item>
    <item name="windowTitleStyle">@android:style/DialogWindowTitle</item>
    <item name="windowIsFloating">true</item>
    <item name="windowContentOverlay">@null</item>
</style>