How to change the background of Android Alert Dialog Title -

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i want change background of alert dialog. have tried following code piece so:

 <style name="theme.alertdialog" parent="@android:style/theme.holo.light.dialog">         <item name="android:background">@android:color/transparent</item>         <item name="android:textcolor">#659f26</item>         <item name="android:windowtitlestyle">@style/theme.alertdialog.title</item>     </style>      <style name="theme.alertdialog.title" parent="@android:style/textappearance.dialogwindowtitle">         <item name="android:background">@drawable/cab_background_top_example</item>     </style>

java code:

contextthemewrapper ctw = new contextthemewrapper( this, r.style.theme_alertdialog); final alertdialog.builder alertdialogbuilder = new alertdialog.builder(ctw);  alertdialogbuilder.settitle(getresources().getstring(r.string.confirmation));    alertdialogbuilder.setmessage(getresources().getstring(r.string.msg));        alertdialogbuilder.show();

my app showing dialog this:

enter image description here

while want like:

enter image description here

please suggest, doing wrong.

use code when creating dialog:

 dialog.requestwindowfeature(window.feature_no_title);

create own layout many customise done title set layout

  dialog.setcontentview(r.layout.yourlayout);

note: use 

dialog.requestwindowfeature(window.feature_no_title); before      dialog.setcontentview(r.layout.yourlayout);

otherwise give error.


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