How to show Dialog Box from the class which extends Application in android?

Question

I want show a dialog box after specific condition , but for demo right now I want show a Dialog Box from the class which extends Application . here is my code

Answer 1

Your program may behave as you want!**

** Just remember that you need to think about the consequences of its actions.

public class MyApplication extends Application {
        /** 
        * show example alertdialog on context -method could be moved to other class 
        * (eg. MyClass) or marked as static & used by MyClas.showAlertDialog(Context)
        * context is obtained via getApplicationContext() 
        */
        public void showAlertDialog(Context context) {
            /** define onClickListener for dialog */
            DialogInterface.OnClickListener listener 
                  = new   DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                // do some stuff eg: context.onCreate(super)
                }
            };

            /** create builder for dialog */
            AlertDialog.Builder builder = new AlertDialog.Builder(context)
                .setCancelable(false)
                .setMessage("Messag...")
                .setTitle("Title")
                .setPositiveButton("OK", listener);
            /** create dialog & set builder on it */
            Dialog dialog = builder.create();
            /** this required special permission but u can use aplication context */ 
            dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
            /** show dialog */
            dialog.show();
        }

        @Override
        public void onCreate() {
            showAlertDialog(getApplicationContext());
        }
}

imports for abowe:

import android.app.AlertDialog;
import android.app.Application;
import android.app.Dialog; 
import android.content.Context;
import android.content.DialogInterface; 
import android.view.WindowManager;

edity:

You cannot **display an application window/dialog through a Context that is not an Activity or Service. Try passing a valid activity reference

** u can use application context to create dialog by adding before call to Dialog.show();

Dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT); 

- but this requires permission:  

Ref:

• Dialogs
• AlertDialog
• WindowType