Show activity like a dialog in Android

When we are developing an Android application, time to time we want to show dialog for messages, confirmations, user interactions, etc. There is a good topic from Google which is explain how can we create and use dialogs.

In project that we are working on nowadays, we have an activity that shows some information to user and has some function buttons for user interactions. Our customer wants this activity like a dialog. When user clicks save button on main activity, this activity will be shown like popup dialog and shows live data to user via continuously server communication. When we were thinking on a dialog solution, we have found a good and quick solution for this kind of cases.

Here is the tricky how can you show activity like a dialog without using dialog structure.

First, set activity theme as a Theme.Dialog in AndroidManifest.xml

<activity
    android:name=".LikeDialogActivity"
    android:theme="@android:style/Theme.Dialog" >
</activity>

After that, remove title from activity.

this.requestWindowFeature(Window.FEATURE_NO_TITLE);

And, we have an activity like a dialog.