One Click Activity - (Android Essentials: XML & Java)

TextView text1 = findViewById(;

b1.setOnClickListener(new View.OnClickListener() {
   public void onClick(View v) {
        //some common activity
       text1.setText("You click on Button1"); //display text
       text2.setVisibility(View.GONE);  //control visibility GONE, VISIBLE
       Toast.makeText(MainActivity.this,"dfsdfn",Toast.LENGTH_LONG).show(); //toast


This snippet of code provides an essential functionality for handling click events in your Android app. When a user interacts with a button (b1), this block of code responds to the click event with a series of actions. It changes the text of a TextView (text1), alters the visibility of another TextView (text2), and displays a Toast message. This is a common pattern for interacting with UI elements in response to user inputs in Android applications.

Here's a breakdown of what happens when b1 is clicked:

  1. text1 displays a new piece of text, "You click on Button1".

  2. text2 is made invisible and removed from the layout by setting its visibility to View.GONE.

  3. A Toast message pops up with a custom text, which can be modified to any string you want to show.

How to use this code:

  1. Make sure you have a TextView in your layout with the ID textdisplay, and another view with the ID you wish to reference as text2.

  2. Copy the provided code into the onCreate method of your MainActivity or into the body of another event you wish to respond to.

  3. Replace "dfsdfn" in the Toast.makeText method with the message you wish to display to the user.

  4. Ensure that b1 is a button defined in your layout file and is initialized in your MainActivity before setting the OnClickListener.

By customizing the string literals and IDs in the code, you can adapt this snippet to handle various clickable UI elements and their respective responses within your app's user interface. Remember to keep user experience in mind and provide feedback that is meaningful and helpful to the user's interactions with your app.