preferences in android

sadam_rana

i m using image pixels to save the preferences of player in game. m saving the image in data folder with pref.save("data/preferences.png"); but when i deploy this to android device it show me error of not finding the data folder. when i save the image directly to the sketch folder it is not deployed with the code to the device. i write the code to create the image when nt available in skecth folder it creates the image in android but can't be able to change the pixel values of the image the code is given below

  if (loadImage("preferences.png")==null)
    {
      pref = createImage(6, 6, RGB);
      pref.loadPixels();
      for (int i = 0; i<36; i++)
      {
        pref.pixels[i] = color(1, 0, 0);
      }
      pref.updatePixels();
      pref.save("preferences.png");
      println("null");
    }
    else
    {
      pref=loadImage("preferences.png");
  //    println("preferences");
    }

PhiLho

Please, remember to use the combo box to select a categoy, Android in your cases. I moved your topics.

GoToLoop

You coulda declared a variable to store the loaded image file once:
PImage imgTmp = loadImage("preferences.png");

calsign

As far as I can tell, the data folder is merged into the assets folder in the APK file, which cannot be edited by the application (although this would be theoretically possible, it would be a breach of Google Play's policies). Instead, you should create a new file in the application's private directory - most Processing functions should work out of the box.

Your approach to saving preferences - using individual pixels in an image file - is somewhat original, but I'm not sure how practical it is. I won't try to stop you, but I would highly recommend an alternative, such as a simple text file - or, even better, Android's SharedPreferences API which is designed specifically for this purpose.

sadam_rana

saving preferences in the pixel works fine in the java mode or on desktop but create problem in android.

can shared preferences directly be implemented in processing ide if yes kindly show me an example

or if no the would i implement it in ecclipse by exporting the application

calsign

The SharedPreferences API should work with Processing. The link above contains information about how to use it - the only thing you'll need that it doesn't mention is the necessary import at the top of the sketch:

import android.content.SharedPreferences;

If you have any trouble, I can write a quick example (but please show what you have tried first!).

sadam_rana

Thank u calsign :) work fine for me posting my code for others.

SharedPreferences settings;
boolean s ;
void setup()
{
  settings = getPreferences(MODE_PRIVATE);
}

void draw()
{
  s = settings.getBoolean(sadam, false);
  if (s)
  {
    fill(0);
    rectMode(CENTER);
    rect(width/2, height/2, width/2, height/2);
  } else if (!s)
  {
    fill(255);
    rectMode(CENTER);
    rect(width/2, height/2, width/2, height/2);
  }
}

void mousePressed()
{
  SharedPreferences.Editor editor = settings.edit();
  editor.putBoolean(sadam, true);
  editor.commit();
}

Asgardinho

Im using this code but im getting the errors:

The function getSharedPreferences(String, int) does not exist

The function getPreferences(int) does not exist

    import android.content.SharedPreferences;
    import android.content.Context;

    void settings() 
    {
      SharedPreferences sharedPref = getSharedPreferences("Data", Context.MODE_PRIVATE);
      SharedPreferences settings = getPreferences(Context.MODE_PRIVATE);
      size(displayWidth, displayHeight);
    }

Asgardinho

made it work with this code, dunno is it is the best way tho.

import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.content.Context;
import android.app.Activity;

SharedPreferences sharedPreferences;
SharedPreferences.Editor editor;
Activity act;

void settings() 
{
  act = this.getActivity();
  sharedPreferences = PreferenceManager.getDefaultSharedPreferences(act.getApplicationContext());
  editor = sharedPreferences.edit();
}

akenaton

@Asgardinho=== yes, that is the way because you are not in an activity but in a fragment

PlayerUp

this is good stuffs!