Handler is abstract ,cannot be instantiated

Question

I am trying to use a Handler in my app. However, when I instantiate it like this:

Handler handler = new Handler(); 

I get the following error:

Gradle: error: Handler is abstract; cannot be instantiated

And when I check the solutions, it asks me to implement these methods:

Handler handler = new Handler() {     @Override     public void close() {              }      @Override     public void flush() {      }      @Override     public void publish(LogRecord record) {      } }; 

I have never used Handlers before and I am using it just to call a method after some delay. To achieve that, I've used:

handler.postDelayed(new Runnable() {         @Override         public void run() {             //Do something after 100ms         }     }, 100); 

But it shows the error:

Gradle: error: cannot find symbol method postDelayed(,int)

Answer 1

It seems you have imported a wrong Handler class

import java.util.logging.Handler; 

Change it to

import android.os.Handler;