How to Generate a New Random UUID in Android on Button Click?

How can I create a new random UUID in an Android application that generates a unique ID each time a button is clicked?

String uniqueId = null;
showRandomId = (Button)findViewById(R.id.showUUID);
showRandomId.setOnClickListener(new View.OnClickListener() {
  public void onClick(View v) {
    uniqueId = UUID.randomUUID().toString();
    int duration = Toast.LENGTH_SHORT;
    Toast toast = Toast.makeText(getBaseContext(), uniqueId, duration);
    toast.show();
  }
});

Generating a new UUID every time a button is clicked in an Android application is straightforward. The previous implementation didn’t regenerate the UUID on subsequent clicks, leading to the same value being reused. This explanation provides a corrected approach to ensure that a new UUID is generated each time the button is pressed, which is essential for tasks like primary key generation in databases.

String uniqueId;
showRandomId = (Button)findViewById(R.id.showUUID);
showRandomId.setOnClickListener(new View.OnClickListener() {
  public void onClick(View v) {
    uniqueId = UUID.randomUUID().toString();
    int duration = Toast.LENGTH_SHORT;
    Toast toast = Toast.makeText(getBaseContext(), uniqueId, duration);
    toast.show();
  }
});

Causes

• The prior implementation only generated a UUID when `uniqueId` was null, meaning it would not create a new one on subsequent button clicks.

Solutions

• Simply remove the conditional check for `uniqueId` being null, allowing a new UUID to be generated every time the button is clicked. Below is the corrected code.

Mistake: Reusing the same UUID across multiple button clicks.

Solution: Ensure that a new UUID is generated every time the button is clicked by removing checks for the existing UUID.

Mistake: Incorrectly naming the method as 'OnClick' instead of 'onClick'.

Solution: Ensure that the onClick method is correctly defined as 'onClick' (with a lowercase 'o').