How to create AlertDialog when transact or start a new Activity?

Issue

public void loadDialog() {
    LayoutInflater inflater = LayoutInflater.from(this);
    View subView = inflater.inflate(R.layout.dialogbox_delete_user_confirmation, null);

    subView.findViewById(R.id.txtDeleteUser);
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("Fill your Secondary Details");
    builder.setView(subView);
    builder.create();

    builder.show();
}

Here, I called the loadDialog() function in onCreate() method of the Activity.But the AlertDialog was not prompting when I load above particular Activity. Simply i created login activity. After successful login new activity will start. But at the same time, I want to show the Alert Dialog box at while transaction of activities. How can I do that?

Solution

You can do so, by basically two simple ways. Which are:-

• Using BaseActivity: In this case you need to create a base activity that will have your AlertDialog with it's context, (current your dialog is missing the context while transaction) whenever you want to show it you can show it by implementing the method after extending the BaseActivity from any other child activities. Steps are showing below :

   public class BaseActivity extends AppCompatActivity {
  
         public void showDialog(String msg)
         {
           // show the dialog
         }
       }
  
   public class Activity1 extends BaseActivity
      {
       public void someFunction()
       {
           showDialog("activity 1");
       }
   }
  
   public class Activity2 extends BaseActivity
   {
       public void someFunction()
       {
           showDialog("activity 2");
       }
   }
  

• Using Fragments: In this you can control it from your respective activity or fragment itself. But this is totally different approach from your current procedure.

Answered By - A S M Sayem