How To Make A Button Visible Frominvisible On A Successful Event Happend In Another Activity

I have buttons V1-V8 visible and R1-R8 invisible initially in my activity_main.xml file My MainActivity.java file package com.example.buttonvtor; import com.example.buttonvtor.Mai

Solution 1:

In your main Activity use startActivityForResult instead of startActivity. This allows you to return a value from the new Activity to the Main Activity. For example:

In main Activity

startActivityForResult(newIntent(MainActivity.this,Payment3Activity.class), 3);

Here, number 3 is a number you define that allows you to identify the result later. In your Payment#Activity you would have at some point (for example when you disimiss your Activity)

setResult(RESULT_OK); // or any result you want

The result is sent to the MainActivity, and you must override onActivityResult() to get the result.

protectedvoidonActivityResult(int requestCode, int resultCode, Intent data){
    if (requestCode == 3) // here you match the number you sent in startActivityForResultif (resultcode == RESULT_OK)
             // do something
}

Solution 2:

You can start the second Activity with startActivityForResult() and catch the result in your first activity in onActivityResult() like e.g. here.