european friends dating - Android validating input data

Then I created a concrete class that extends the Text Validator class and implements the validate method: I highlighted in the two key elements of this class, that it extends Text Validator, and how to get the cool “icon” and error message.Using Text Error gives us the desired visual validation.Through this exercise, I was able to find some really great resources from all over the web that helped move the process forward.

Read on for what I did, and the tips and tricks I learned along the way!

I like the display cue of the red icon (which can be customized) and the hover text which displays when each field has focus.

So now that I knew what I wanted to do, the next important question was: how to do it?

So let me answer that based on my list of “whens” from above.

Android provides a long list of “input types” that you can set in the layout XML to “set the user up for success” so that they can only enter permissible characters or numbers.

For example: an input type of “phone” leads to only numbers, and characters such as -, (, ) being available for the user to enter: The XML to achieve this is shown below: The challenge is finding the proper list of input type values to use in the layout XML and what they make the Android device do. Next up: what you can do when the user changes the text in a field and still manages to enter something incorrect, even though we set them up for success above.

I have heard lots of questions about how to develop for Android OS lately, so I’ve made a point to explore more about native Android programming.

Specifically, effective and efficient (and cool looking! I started by working on a small mobile application that would require individuals to enter contact […] I started by working on a small mobile application that would require individuals to enter contact information.

I assume you have connected your actual Android Mobile device with your computer.

Toast; public class Main Activity extends App Compat Activity Let's try to run your application.

Step 2 − Add the following code to res/layout/activity_package com.myapplication; import android.

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