Android编程权威指南-第一章挑战练习二：添加后退按钮-优快云博客

本文档详细介绍了在QuizActivity.java和activity_quiz.xml中实现Android应用程序后退按钮的步骤和实践，旨在帮助开发者理解Android编程中的导航机制。

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QuizActivity.java

package com.onevol.app;

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

import com.example.geoquiz.R;

public class QuizActivity extends Activity {
   
   

    private Button mTureButton;
    private Button mFalseButton;
    private Button mPrevButton;
    private Button mNextButton;
    private TextView mQuestionTextView;
    private TrueFalse[] mQuestionBank = new TrueFalse[] {
            new TrueFalse(R.string.question_africa, false),
            new TrueFalse(R.string.question_americas, true),
            new TrueFalse(R.string.question_asia, true),
            new TrueFalse(R.string.question_mideast, false),
            new TrueFalse(R.string.question_oceans, true),
    };
    private int mCurrectIndex = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_quiz);