Java:package R does not exist
<p>I am creating a simple facts app and have followed a tutorial thoroughly but am getting the error Cannot resolve symbol R in my Main Activity. I tried importing mypackagename.R but that did not work either</p>

<p>My package name is:
package com.example.saarikakumar.myapplication;</p>

<p>My main activity code is as follows:</p>

<pre><code>import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.MotionEvent;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.example.saarikakumar.myapplication.android.R;

public class MainActivity extends AppCompatActivity {

    TextView factBox;
    LinearLayout bg;
    Facts factHolder = new Facts();
    Backgrounds backs = new Backgrounds();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        factBox = (TextView) findViewById(R.id.factTextbox);
        bg = (LinearLayout) findViewById(R.id.background);
        bg.setBackgroundColor(getResources().getColor(backs.getbackground()));
        bg.setOnTouchListener(new OnSwipeTouchListener(this) {

            public void onSwipeTop() {

            }

            public void onSwipeRight() {

                prev();
            }
            public void onSwipeLeft() {

                next();
            }
            public void onSwipeBottom() {

            }

            public boolean onTouch(View v, MotionEvent event) {
                return gestureDetector.onTouchEvent(event);
            }
        });

    }

    private void prev() {
        factBox.setText(factHolder.prevFact());
        bg.setBackgroundColor(getResources().getColor(backs.getbackground()));

    }

    private void next() {
        factBox.setText(factHolder.nextFact());
        bg.setBackgroundColor(getResources().getColor(backs.getbackground()));



    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    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();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }


    public void genFact(View view) {
        next();


    }
</code></pre>