Android Activity as a dialog popup box

Let say I have an Activity named PasswordCreatePage which has child dialogs as well. Now, I want to display this activity as a dialog for another activity. At this stage we need something special to do. First let see PasswordCreatePage class below:

package com.pritom.kumar; import android.app.Activity; import android.os.Bundle; import android.view.ViewGroup; import android.view.Window; public class PasswordCreatePage extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // If you want to hide title bar this.requestWindowFeature(Window.FEATURE_NO_TITLE); // Setting dialog box title setTitle(R.string.set_password); // Setting layout page at this stage setContentView(R.layout.password_create_page); // If you want to finish this activity on touch outside of this dialog this.setFinishOnTouchOutside(false); // Setting dialog box width 100% and height as content height getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); } }

Now we will create/modify a theme in PROJECT/RES/VALUES named STYLES.XML, add below content to the file (actually this file describes the style of the dialog box):

<style name="AlertDialogCustomWithTitle" parent="@android:style/Theme.Dialog"> <item name="android:buttonStyle">@style/ButtonColor</item> </style>

At this stage we will create a layout page with below content (it's actually a simple layout page):

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/constraintLayout" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:layout_gravity="center" android:padding="10dp"> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/password" /> </LinearLayout>

Now we will put an entry to ANDROIDMANIFEST.XML related to our Activity:

<activity android:name=".PasswordCreatePage" android:theme="@style/AlertDialogCustomWithTitle" android:excludeFromRecents="true"> </activity>

We are done. If you open this activity, this will open as a Dialog Popup Box.