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Android Build a Simple Android App (2014) Basic Android Programming Adding the onClick() Method

I get these errors everytime I try to run it.

Error:(21, 59) error: cannot find symbol variable showFactButton

Error:Execution failed for task ':app:compileDebugJava'.

Compilation failed; see the compiler error output for details.

my code: package dancompany.factsabouteverything;

import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.TextView;

public class FactsAboutEverythingActivity extends Activity {

protected void onCreate(Bundle savedInstanceState) {

    //Declare our view variables and assign the views from the layout files
    final TextView factLabel = (TextView) findViewById(R.id.factTextView);
    Button showFactButton = (Button) findViewById(R.id.showFactButton);

    View.OnClickListener listener = new View.OnClickListener() {
        public void onClick(View view) {
          //The button was clicked, so update the fact label with a new fact
            String fact = "Cats sleep 16 hours per day.";

public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.facts_about_everything, menu);
    return true;

public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    return super.onOptionsItemSelected(item);


1 Answer

Your code looks fine, but I think the issue may be in your "activity_facts_about_everything.xml" file. Make sure that the Buttons id is actually assigned to "showFactButton".