1. Your First Android Application

Android Programming (3rd Edition) 1. Your First Android Application
1

Hello,
I’m trying to finish the firs chapter of the book, but whe i complie the messages gradle build shows me these errors:
Error:(43, 36) error: cannot find symbol variable menu
Error:(47, 5) error: method does not override or implement a method from a supertype
Error:(50, 22) error: cannot find symbol variable action_settings

My code:

package com.dranch.bigner.android.geoquiz;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class QuizActivity extends AppCompatActivity {

    private Button mTrueButton;
    private Button mFalseButton;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_quiz);

        mTrueButton = (Button) findViewById(R.id.true_button);
        mTrueButton.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v){
                Toast.makeText(QuizActivity.this,
                                R.string.incorrect_toast,
                                Toast.LENGTH_SHORT).show();
            }
        });
        mFalseButton = (Button) findViewById(R.id.false_button);
        mFalseButton.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v){
                Toast.makeText(QuizActivity.this,
                        R.string.correct_toast,
                        Toast.LENGTH_SHORT).show();
            }
        });

    }

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

    @Override
    public boolean onOptionsItemsSelected(MenuItem item){
        int id = item.getItemId();
        if(id == R.id.action_settings){
            return true;
        }
        return super.onOptionsItemSelected(item);
    }


}

And the xml:

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="24dp"
        android:text="@string/question_text"/>

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <Button
            android:id="@+id/true_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/true_button"/>
        <Button
            android:id="@+id/false_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/false_button"/>
    </LinearLayout>
</LinearLayout>

Any suggestion is welcomed!

2

delete the codes above? Because you don’t create menu yet.