Android Build a Simple Android App Basic Android Programming Accessing Views in Code: Declaring Variables

Luke Kim
Luke Kim
482 Points

What is the error of the "R.layout.activity_fun_facts" mean?

package com.example.overmind.funfacts;

import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.Button; import android.widget.TextView;

public class FunFactsActivity extends AppCompatActivity { // Declare our View variables private TextView mFactTextView; private Button mShowFactButton;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_fun_facts);
}

}

In the editor, it keeps on saying that it cannot define what it means or simply put,"Cannot resolve for symbol 'R'." Is it okay if you can tell me if this is a major thing or a bad thing.

1 Answer

Couple of things you could try

a) Click on Build->Clean Project and that will perform a gradle clean.

b) Or Tools -> Android -> Sync Project with Gradle Files.

c) check if you have the latest android SDK build tools installed.

Hope this works for you else would be happy to look into further.

Luke Kim
Luke Kim
482 Points

setContentView(R.layout.activity_fun_facts);

The R in the R.layout is giving me an error. Can you help me fix it?