About challenge one

#1
This is the solution to my first problem. I think my logic is all right, but it doesn't work.
    package com.example.geoquize;

import android.content.Context;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
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.example.geoquize.answer_is_true”;
private static final String EXTRA_ANSWER_SHOWN=“com.example.geoquize.answer_shown”;
private static final String TAG=“CheatActivity”;
private static final String KEY_INDEX_c=“index_c”;

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

public static Intent newIntent(Context packageContext, boolean answerIasTrue){
    Intent intent=new Intent(packageContext,CheatActivity.class);
    intent.putExtra(EXTRA_ANSWER_IS_TRUE,answerIasTrue);
    return intent;
}
public static boolean wasAnswerShown(Intent result){
    return result.getBooleanExtra(EXTRA_ANSWER_SHOWN,false);
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.d(TAG,"onCreate(Bundle)called");
    setContentView(R.layout.activity_cheat);
   if(savedInstanceState !=null){
      boolean y=savedInstanceState.getBoolean(KEY_INDEX_c,false);
      setAnswerShownResult(y);

    }
    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 v) {
            if(mAnswerIsTrue){
                mAnswerTextView.setText(R.string.true_button);
            }else{
                mAnswerTextView.setText(R.string.false_button);
            }
            setAnswerShownResult(true);
            x=true;
        }
    });
}
@Override
public void onStart(){
    super.onStart();
    Log.d(TAG,"onStart()called");
}
@Override
public void onResume(){
    super.onResume();
    Log.d(TAG,"onResume()called");
}
@Override
public void onPause(){
    super.onPause();
    Log.d(TAG,"onPause()called");
}
@Override
public void onStop(){
    super.onStop();
    Log.d(TAG,"onStop()called");
}
@Override
public void onDestroy(){
    super.onDestroy();
    Log.d(TAG,"onDestroy()called");
}
private void setAnswerShownResult(boolean isAnswerShown){
    Intent data=new Intent();
    data.putExtra(EXTRA_ANSWER_SHOWN,isAnswerShown);
    setResult(RESULT_OK,data);
}

@Override
public void onSaveInstanceState(Bundle savedInstanceState){
    super.onSaveInstanceState(savedInstanceState);
    Log.i(TAG,"onSaveInstanceState");
    savedInstanceState.putBoolean(KEY_INDEX_c,x);
}

}

#2

After all these time, you’ve probably figured it out so I won’t look into your codes, the logic does seem alright. But hey, you’ve gotta learn to name your variables properly. “x”, "y, “c” won’t tell you what they are for in a few months, or even weeks.