Android | App to Add Two Numbers

Below are the steps for Creating a Simple Android Application to Add Two Numbers

• STEP-1: First of all go to the xml file
• STEP-2: Now go to the text and write the code for adding 3 TextView,2 EditText and Button and Assign ID to each component. Assign margin top, left, right for the location.
• STEP-3: Now, open up the activity java file.
• STEP-4: Declare few variables and the values entered in the Text Views can be read by using an id which we have set in the XML code above.
• STEP-5: Add the click listener to the Add button.
• STEP-6: When the Add button has been clicked, add the values and store it into the sum variable.
• STEP-7: To show the output in the result text view, set the sum in the textview.

Complete code of layout xml file and java file is given below. 

activity_main.xml

MainActivity.java