How to save an answer in a riddle game without creating a database?

Question

I've created a question and answer game with different levels, each level consisting a question. I didn't create it with a database. I just used string. When the user answers a question in level one he is taken to level two but when the user returns back to level one, he has to type the answer again even though he's solved it before. Is there anyway in JAVA to keep the answer in the type panel (if the user's solved it) without having to create a database?? Also, while typing in the type panel, the user has to delete the "Type here..." and then answer. Is there anyway that when user taps to type the "Type here..." is automatically erased?

Here's my level one activity.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/background"
    android:weightSum="1"
    android:textAlignment="center"
    android:id="@+id/level1">

    <TextView
        android:layout_width="300dp"
        android:layout_height="200dp"
        android:text="What has 88 keys but cannot open a single door?"
        android:id="@+id/que1"
        android:width="255dp"
        android:textSize="30dp"
        android:layout_margin="50dp"
        android:textStyle="italic"
        android:gravity="center" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/type1"
        android:layout_gravity="center_horizontal"
        android:text="Type here..." />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Check answer..."
        android:id="@+id/check1"
        android:layout_gravity="center_horizontal" />
</LinearLayout>

and here's my Oneactivity.java

package com.golo.user.gaunkhanekatha;

import android.app.Activity;
import android.content.Intent;
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.EditText;
import android.widget.Toast;
import android.os.Handler;



public class OneActivity extends Activity {
public SharedPreferences preferences; //ADDED THIS LINE
    public Button check;
    public EditText typeh;
    private Toast toast;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_one);
        toast = Toast.makeText(OneActivity.this, "", Toast.LENGTH_SHORT);
        check = (Button)findViewById(R.id.check1); //R.id.button is the id on your xml
        typeh = (EditText)findViewById(R.id.type1); //this is the EditText id
        check.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                // Perform action on click
                //Here you must get the text on your EditText
                String Answer = (String) typeh.getText().toString(); //here you have the text typed by the user
                //You can make an if statement to check if it's correct or not
                if(Answer.equals("Piano") || (Answer.equals("Keyboard")))
                {
                    preferences = PreferenceManager.getDefaultSharedPreferences(v.getContext());
                SharedPreferences.Editor editor = preferences.edit();
                editor.putInt("Level 1 question 1 ", 1); //Depends of the level he have passed.
                editor.apply();
                ///Correct Toast
                toast.setText("Correct");
                toast.setGravity(Gravity.TOP | Gravity.LEFT, 500, 300);
                toast.show();
                Intent i = new Intent(OneActivity.this, TwoActivity.class);
                startActivity(i);
                finish();

                }
                else{
                    //It's not the correct answer
                    toast.setText("Wrong! Try again...");
                    toast.show();
                }
            }
        });
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if(toast!= null) {
            toast.cancel();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_aboutus, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

Also, the toast is displayed where there's keyboard. Is there anyway to move the toast screen to somewhere on the screen where it is clearly visible?

Answer 1

I'll give to you two methods to do it :

Create a LevelEarned class as follows :

public class LevelEarned {
 public static int level = 0;
}

Everytime you get an Intent (because user has answered the question correctly) just type :

LevelEarned.level = 1; // 1 depends with the level you have answered correctly

And the best method that it's that I'd use to this it's called SharedPreferences

You can use SharedPreferences to save any primitive data: booleans, floats, ints, longs, and strings. This data will persist across user sessions (even if your application is killed).

The first thing you have to do is store this data on SharedPreferences and you do it with an Editor as follows :

SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(v.getContext());
SharedPreferences.Editor editor = preferences.edit();
editor.putInt("player_level",1); //Depends of the level he have passed.
editor.apply();

NOTE

I guess you will do it immediately when the user accepts the question so, you'll do it on a Button click so you'll have to pass as a context v.getContext() if you are not on a ButtonClick and you are on your onCreate() just call this to refer your context.

To get the stored data (level) you'll need to do this :

SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
int level = preferences.getInt("player_level", 0);

Let's explain to you a little bit.

The first parameter it's the key to find the SharedPreference so it won't change and the second one is a default value that it's used in case it doesn't find any "player_level" SharedPreferences.

Hope it helps to you to keep going in your code :)

EDIT2

Create SharedPreferences preferences as a global variable as follows :

public SharedPreferences preferences;

Then inside of your onClick() method add those lanes :

check.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            // Perform action on click
            //Here you must get the text on your EditText
            String Answer = (String) typeh.getText().toString(); //here you have the text typed by the user
            //You can make an if statement to check if it's correct or not
            if(Answer.equals("4") || (Answer.equals("four")))
            {
                preferences = PreferenceManager.getDefaultSharedPreferences(v.getContext());
                SharedPreferences.Editor editor = preferences.edit();
                editor.putInt("player_level",1); //Depends of the level he have passed.
                editor.apply();
                //Create a Toast because it's correct
                Toast.makeText(OneActivity.this, "Correct!",
                        Toast.LENGTH_LONG).show();
            }
            else{
                //It's not the correct answer
                Toast.makeText(OneActivity.this, "Wrong! Try Again",
                        Toast.LENGTH_LONG).show();
            }
        }
    });

And where you want to know the level you only will have to do :

SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
int level = preferences.getInt("player_level", 0); //level is the current level of the player.

EDIT 3

Create a class as follows :

 public static class LevelPlayer(){

     public int static getLevelPlayer(){

     SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
     int level = preferences.getInt("player_level", 0); //level is the current level of the playe


     return level;
     }

  }

And every time you want to ask the level of the player you do :

int Level = LevelPlayer.getLevelPlayer(); //that's the level

So after every question you can ask the level and put the next question.

EDIT4

I've made some changes, delete your lvl class and put this code :

public class lvl{
public Context mcontext;

public lvl(Context context){
    this.mcontext = context;

}
public int getLevelPlayer(){

    SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(mcontext);
    int level = preferences.getInt("player_level", 0); //level is the current level of the playe
    return level;
}

Then on your MainActivity(or wherever you have to know what's the level of the player) you have to put this :

public levelplayer mlevelplayer;

Then inside on your onCreate() add this :

mlevelplayer = new levelplayer(this);
int level  = mlevelplayer.getLevelPlayer();

Answer 2

You can use SharedPreferences To Write to shared preference

SharedPreferences sharedPref = context.getPreferences(Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPref.edit();
editor.putInt(getString(R.string.saved_high_score), newHighScore);
editor.commit();

to read

SharedPreferences sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
int defaultValue = getResources().getInteger(R.string.saved_high_score_default);
long highScore = sharedPref.getInt(getString(R.string.saved_high_score), defaultValue);

Answer 3

it is simple. Just create a file to store information. You can do it in two ways. one is to save a simple xml or json, the second one is to create a model of your answer and serialize a collection of them and save them in file.

Remember that you should do it in some kind of structure way: json, xml, serialized class. it is much simpler to work in future with that

Answer 4

You have a few options that you could try.

One option is as @Stultuske stated, you could try an XML or a TXT file stored on the users device. This (as well as a database) would persist between application sessions.

The other option that you have is you could create a singleton class. For example, a class called Globals (as below) :

    public class Globals {
        private static Globals instance;

        private String questionOneAnswer;


        private Globals(){}

        public String getQuestionOne()
        {
            return this.questionOneAnswer;
        }

        public void setQuestionOne(String questionOne)
        {
            this.questionOneAnswer = questionOne;
        }

        public static synchronized Globals getInstance()
        {
            if(instance==null)
            {
                instance=new Globals();
            }
            return instance;
        }
    }

This can then be called with Globals g = Globals.getInstance(); . This will only persist through your application instance; however, so if you are wanting to store it throughout app launches you can try the XML/TXT or SharedPreferences as stated by @shaikhmanzoor .

Also it is customary to define variable names with camelCase - ie answers rather than Answers, or typeH rather than typeh. Have a look here for the guidelines for Google Java coding.

Answer 5

For your first question just use SharedPreferences to save and fetch the data like this SharedPreferences sharedPref = context.getPreferences(Context.MODE_PRIVATE); SharedPreferences.Editor editor = sharedPref.edit(); editor.putInt("level_no_answer", answer_given_by_user); editor.commit();

and for your second question, you are using android:text="Type here..." in EditText. just replace that line by android:hint="Type here..."