Question

i have created a MainActivity and a SecondActivity. When onClick MainActivity it starts the SecondActivity. When SecondActivity finish, it returns a value that turns an ImageView.setVisibility(View.VISIBLE); and makes a counter++.

My problem is that when i close the application and then restart it again all the values were cleared and my ImageView turns ImageView.setVisibility(View.INVISIBLE); and the counter == 0 again.

How can i save data (the result of SecondActivity) even if i close the aplication or reboot my mobile? I want to set public void onCreate(Bundle savedInstanceState) { as before i close the application each time i restart it.

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What I want is to save “int contadorliga”, “correcto1.setVisibility(View.VISIBLE);” and “correcto2.setVisibility(View.VISIBLE);” so each time I restar the app it is as the latest time it was. This is my code:

package com.fakur.android.futbolquiz;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

public class Liga extends Activity {
/** Called when the activity is first created. */

static final int LIGA = 0;
int contadorbarcelona = 0;
int contadormadrid = 0;
int contadorliga = 0;

ImageView about;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

setContentView(R.layout.liga);
TextView contador1 = (TextView) findViewById(R.id.contador1);
contador1.setText(contadorliga + "/20");
}

public void onBarcelonaClick(View botton) {

Intent intent = new Intent();
intent.setClass(this,Pregunta.class);
intent.putExtra("Barcelona", "Barcelona");
startActivityForResult(intent,LIGA);
}

public void onMadridClick(View botton) {

Intent intent = new Intent();
intent.setComponent(new ComponentName(this,Pregunta.class));
intent.putExtra("Madrid", "Madrid");
startActivityForResult(intent,LIGA);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);

TextView contador1 = (TextView) findViewById(R.id.contador1);
ImageView correcto1 = (ImageView) findViewById(R.id.correcto1);
ImageView correcto2 = (ImageView) findViewById(R.id.correcto2);

if (requestCode == LIGA){

  if (resultCode == 1) {

      if(contadorbarcelona == 0){

          correcto1.setVisibility(View.VISIBLE);
          contadorliga++ ;
          contadorbarcelona++;
      }
  }

  if (resultCode == 2) {
      if(contadormadrid == 0){

           correcto2.setVisibility(View.VISIBLE);
           contadorliga++ ;
           contadormadrid++;
      }
  }

}

contador1.setText(contadorliga + "/20");

}

Answer 1

Usage of shared preferences is best fit for you, see here

Edit:

• Added source below in response to your comment;

  private static final String PREFERENCES_CONTADORLIGA =  "ChangeThisTextWithSomethingYouPrefer";
  private static final String PREFERENCES_CONTADORLIGA_KEY = "ChangeThisTextWithSomethingYouPrefer";
  
  
  public void onCreate(Bundle savedInstanceState)
  {
  
      // Restore preferences
      SharedPreferences settings = getSharedPreferences(PREFERENCES_CONTADORLIGA, Context.MODE_PRIVATE);
      contadorliga = settings.getInt(PREFERENCES_CONTADORLIGA_KEY, 0);
  }
  
  
  
  protected void onDestroy() 
  {
  
      super.onDestroy();
  
      // We need an Editor object to make preference changes.
      // All objects are from android.context.Context
      SharedPreferences settings = getSharedPreferences(PREFERENCES_CONTADORLIGA, Context.MODE_PRIVATE);
      SharedPreferences.Editor editor = settings.edit();
      editor.putInt(PREFERENCES_CONTADORLIGA_KEY, contadorliga);
  
      // Commit the edits!
      editor.commit();
  }
  

I hope this should work for you. Good Luck!