Android-GeoQuiz

CheatActivity

import android.content.Context;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class CheatActivity extends AppCompatActivity {

    private static final String EXTRA_ANSWER_IS_TRUE = "com.bignerdranch.android.geoquiz.answer_is_true";

    private static final String EXTRA_ANSWER_SHOWN = "com.bignerdranch.android.geoquiz.answer_shown";

    private boolean mAnswerisTrue;

    private TextView mAnswerTextView;

    private Button mShowAnswerButton;

    public static Intent newIntent(Context packageContext,boolean answerisTrue){
        Intent intent = new Intent(packageContext,CheatActivity.class);
        intent.putExtra(EXTRA_ANSWER_IS_TRUE,answerisTrue);
        return intent;
    }

    public static boolean wasAnswerShown(Intent intent){
        return intent.getBooleanExtra(EXTRA_ANSWER_SHOWN,false);
    }

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

        mAnswerisTrue = getIntent().getBooleanExtra(EXTRA_ANSWER_IS_TRUE,false);

        mAnswerTextView = (TextView) findViewById(R.id.answer_text_view);

        mShowAnswerButton = (Button) findViewById(R.id.show_answer_button);
        mShowAnswerButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(mAnswerisTrue){
                    mAnswerTextView.setText(R.string.true_button);
                }else{
                    mAnswerTextView.setText(R.string.false_button);
                }
                setAnswerShownResult(true);
            }
        });
    }

    private void setAnswerShownResult(boolean isAnswerShown){
        Intent data = new Intent();
        data.putExtra(EXTRA_ANSWER_SHOWN,isAnswerShown);
        setResult(RESULT_OK,data);
    }
}

Question

/**
 * Created by 13178 on 2018-3-21.
 */

public class Question {

    private int mTextResId;

    private boolean mAnswerTrue;

    public Question(int textResId ,boolean answerTrue){
        mTextResId=textResId;
        mAnswerTrue=answerTrue;
    }

    public int getTextResId() {
        return mTextResId;
    }

    public void setTextResId(int textResId) {
        mTextResId = textResId;
    }

    public boolean isAnswerTrue() {
        return mAnswerTrue;
    }

    public void setAnswerTrue(boolean answerTrue) {
        mAnswerTrue = answerTrue;
    }
}

QuizActivity

import android.app.Activity;
import android.content.Intent;
import android.media.Image;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.TextView;
import android.widget.Toast;

public class QuizActivity extends AppCompatActivity {

    private static final int REQUEST_CODE_CHEAT = 0;

    private static final String TAG ="QuizActivity";

    private static final String KEY_INDEX = "index";

    private Button mTruebutton;

    private Button mFalsebutton;

    private Button mPrevbutton;

    private Button mNextbutton;

    private Button mCheatbutton;

    private TextView mQuestionTextView;

    private Question[] mQuestionBank = new Question[]{
            new Question(R.string.question_australia,true),
            new Question(R.string.qusetion_oceans,true),
            new Question(R.string.qusetion_mideast,false),
            new Question(R.string.question_africa,false),
            new Question(R.string.question_americas,true),
            new Question(R.string.question_asia,true)
    };

    private int mCurrentIndex = 0;

    private boolean mIsCheater;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.d(TAG,"onCreate(Bundle) called");
        setContentView(R.layout.activity_quiz);

        if(savedInstanceState!=null){
            mCurrentIndex = savedInstanceState.getInt(KEY_INDEX,0);
        }

        mQuestionTextView = (TextView) findViewById(R.id.queston_text_view);
        //int queston = mQuestionBank[mCurrentIndex].getTextResId();
        //mQuestionTextView.setText(queston);
        mQuestionTextView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mCurrentIndex=(mCurrentIndex+1) % mQuestionBank.length;
                //int question = mQuestionBank[mCurrentIndex].getTextResId();
                //mQuestionTextView.setText(question);
                updateQuestion();
            }
        });
        mTruebutton = (Button) findViewById(R.id.true_button);
        mTruebutton.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v){
                //Toast toast=Toast.makeText(QuizActivity.this,
                //        R.string.correct_toast,
                //        Toast.LENGTH_SHORT);
                //toast.setGravity(Gravity.TOP,0,170);
                //toast.show();
                //dose nothing yet ,but soon.
                checkAnswer(true);
            }
        });
        mFalsebutton = (Button) findViewById(R.id.false_button);
        mFalsebutton.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v){
                /*Toast toast=Toast.makeText(QuizActivity.this,
                        R.string.incorrect_toast,
                        Toast.LENGTH_SHORT);
                toast.setGravity(Gravity.TOP,0,170);
                toast.show();
                //dose nothing yet ,but soon.*/
                checkAnswer(false);
            }
        });
        mPrevbutton =(Button) findViewById(R.id.prev_button);
        mPrevbutton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mCurrentIndex=(Math.abs(mCurrentIndex-1)) % mQuestionBank.length;
                //int question = mQuestionBank[mCurrentIndex].getTextResId();
                //mQuestionTextView.setText(question);
                updateQuestion();
            }
        });

        mNextbutton =(Button) findViewById(R.id.next_button);
        mNextbutton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mCurrentIndex=(mCurrentIndex+1) % mQuestionBank.length;
                //int question = mQuestionBank[mCurrentIndex].getTextResId();
                //mQuestionTextView.setText(question);
                mIsCheater = false;
                updateQuestion();
            }
        });

        mCheatbutton = (Button) findViewById(R.id.cheat_button);
        mCheatbutton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //Intent intent = new Intent(QuizActivity.this, CheatActivity.class);
                boolean answerIsTrue = mQuestionBank[mCurrentIndex].isAnswerTrue();
                Intent intent = CheatActivity.newIntent(QuizActivity.this,answerIsTrue);
                startActivityForResult(intent,REQUEST_CODE_CHEAT);
                //startActivity(intent);
            }
        });
        updateQuestion();
    }

    @Override
    protected void onActivityResult(int requestCode,int resultCode,Intent data){
        if(resultCode != Activity.RESULT_OK){
            return;
        }
        if(requestCode == REQUEST_CODE_CHEAT){
            if(data==null){
                return;
            }
            mIsCheater = CheatActivity.wasAnswerShown(data);
        }
    }

    @Override
    protected void onStart(){
        super.onStart();
        Log.d(TAG,"onStart() called");
    }
    @Override
    protected void onResume(){
        super.onResume();
        Log.d(TAG,"onResume() called");
    }
    @Override
    protected void onPause(){
        super.onPause();
        Log.d(TAG,"onPause() called");
    }
    @Override
    public void onSaveInstanceState(Bundle savedInstanceState){
        super.onSaveInstanceState(savedInstanceState);
        Log.i(TAG,"onSaveInstanceState");
        savedInstanceState.putInt(KEY_INDEX,mCurrentIndex);
    }
    @Override
    protected void onStop(){
        super.onStop();
        Log.d(TAG,"onStop() called");
    }
    @Override
    protected void onDestroy(){
        super.onDestroy();
        Log.d(TAG,"onDestroy() called");
    }



    private void updateQuestion(){
        int question = mQuestionBank[mCurrentIndex].getTextResId();
        mQuestionTextView.setText(question);
    }

    private void checkAnswer(boolean userPressedTrue){
        boolean answerIsTrue = mQuestionBank[mCurrentIndex].isAnswerTrue();
        int messageResId = 0;
        if(mIsCheater){
            messageResId = R.string.judgment_toast;
        }else {
            if(userPressedTrue==answerIsTrue){
                messageResId=R.string.correct_toast;
            } else{
                messageResId=R.string.incorrect_toast;
            }
        }
        Toast.makeText(this,messageResId,Toast.LENGTH_LONG).show();
    }
}

activity_cheat.xml








activity_quiz.xml




    

    

        

activity_quiz.xml横屏



    

    

        

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