Challenge5.5: CheatActivity problem

Android Programming (3rd Edition) 5. Your Second Activity
1

Hello everyone,
I have a big trouble in the second loophole of Challenge5.5, Here is my code. Could you please complement it？ Thank you！

package com.bignerdranch.android.geoquiz;

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;
    private static final String KEY_ANSWER = "anwsered";
    private boolean mA=false;
    

    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 result) {
        return result.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);
        if(savedInstanceState!=null){
            mA=savedInstanceState.getBoolean(KEY_ANSWER,false);
        }

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

    @Override
    public void onSaveInstanceState(Bundle savedInstanceState) {
        super.onSaveInstanceState(savedInstanceState);
        savedInstanceState.putBoolean(KEY_ANSWER, mA);
    }

    private void setAnswerShownResult(boolean isAnswerShown) {
        Intent data = new Intent();
        data.putExtra(EXTRA_ANSWER_SHOWN, isAnswerShown);
        setResult(RESULT_OK, data);
    }
}
2

Hello everyone!
Here is a piece of good news. I have finished this problem by myself. Please consult the solution I posted just now.
Best regards!

3

Hi, I am having same problem in cheat activity. After pressing cheat button, the screen closes. How did you fix the problem? If you don’t mind, can you teach me?

4

Hi Monkey,
Why not post your code right here？Anyway, I am glad to help you although I am just a beginner.
Best regards.

5

The first challenge:

package io.github.yuedev.geoquiz;

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 =
            "CheatActivity.answer_is_true";
    private static final String ANSWER_SHOWN =
            "CheatActivity.answer_shown";
    private static final String KEY_CHEAT = "IS_CHEAT";

    private TextView mAnswerTextView;
    private Button mShowAnswerButton;
    private boolean mAnswerIsTrue;
    private boolean mIsAnswer = false;

    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 resultData) {
        return resultData.getBooleanExtra(ANSWER_SHOWN, false);
    }

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

        if (savedInstanceState != null) {
            mIsAnswer = savedInstanceState.getBoolean(KEY_CHEAT, false);
        }

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

        mAnswerTextView = findViewById(R.id.answer_text_view);

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

    }


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

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putBoolean(KEY_CHEAT, mIsAnswer);
    }

    @Override
    public void onBackPressed() {
        setAnswerShownResult(mIsAnswer);
        super.onBackPressed();

    }
}
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