ANDROID PORGRAMMING IN JAVA

I need to create Android app which has valid password as string of eight characters or more with at least one uppercase letter, one lowercase letter, and one digit. The text field and the label should be with a minimum of four attributes. The two components should be centered vertically. it should show VALID or INVALID types I've attached screenshot of expected outcome

4:49 41 4:51 Password Strength Password Strength Enter your password 123456 Suggest contact names? Tap for info. qwertyuio p INVALID a s df gh jk I 7123