Friendship

Using Java in Android Studio

Objectives:

Design Layout

Utilize Layout Manager

Utilize Intent

Pass Data among Activities

Handle Rotation

Outcome:

You are required to design two activities. The first will check the user$$s credentials. If the credentials meet the criteria, show the second activity; otherwise, stay on the first activity with an error message.

Description in Detail:

Step $1$: Design a Login Page Using ConstraintLayout

Details:

Define two TextViews $($one with "User Name" and the other with "Password"$).$

Create two corresponding EditTexts $($for User Name and Password$).$

Add one Button $($with "SUBMIT" as its text$).$

Include an additional TextView for displaying error messages, which will be used in Step $2.$

Ensure the password is not shown in clear text.

When rotating the device, ensure that the inputs persist. $($This is just a smoke test; do you know why?$)$

Step $2$: Handle the onClick event for the SUBMIT Button

When the SUBMIT button is clicked, check if the User Name is $$harry potter$$ or $$hermione granger$($all lower$-$case$)$ and the Password is $$Ron Weasley$($with R and M capitalized$).$

If the criteria are met, launch the second activity and pass the user name to it $($Hint: Use a Bundle with startActivity$).$

If the credentials are incorrect, display an error message, such as $$Wrong Credentials. Try again,$$ in the Error TextView defined in Step $1.$

Step $3$: Design the Second Activity

On the second activity, display a sentence like $$Welcome XXX$,$ where XXX represents the user name $($either "Harry Potter" or "Hermione Granger"$)$ passed from the login activity. Do not hard code the user name.