problems sending 2d array to another layout android eclipse java

Question

I'm creating an android application with 2 layouts. In one layout the user input data and I would like to keep this data and use it on a different layout.

I try using 2d array, but it seems that array values are not sent to the second layout.

On my first layout

grid = new double[2][long];
for( int i=0; i<long; i++ )
{
    grid[0][i]=Data[i];
    grid[1][i]=Value2;  
}

public double[][] sendGrid() 
{
    return grid;
}

When I want to call the 2d grid array on the second Layout I have...

try{
    Layout1 mapInstance = new Layout1y();
    double[][] dataX = mapInstance.sendGrid();
    Log.i("dataXLength",""+dataX.length);
}
catch(Exception e)
{
    Log.i("-OK",e.toString());
}

The result is: 04-13 10:31:45.357: I/-OK(28588): java.lang.NullPointerException

Any idea on how can I send the 2d array to my second layout?

Thank you

use shared preferences or pass the grid value through the intent. — Sankar V
– Sankar V, Commented Apr 13, 2013 at 15:46

Abubakar · Accepted Answer · 2013-04-13 15:59:22Z

1

there are couple of methods to do that but i think in your case its best suited if you make your 2d array static.

static double grid = new double[2][long];

Now in next activity access like this

double[][] dataX =Activity1.grid[][];

answered Apr 13, 2013 at 15:59

Abubakar

1,03010 silver badges20 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Gerardo Abdo Over a year ago

This option seems to be very simple. Thank you very much, it is working now!

Raghunandan Over a year ago

@GerardoAbdo You should use intents to pass data between activities. Using static variables is not recommended. youtube.com/watch?v=_CruQY55HOk. The guy in the video gives a big warning using static variables. developer.android.com/training/articles/….

Community · Accepted Answer · 2017-05-23 12:18:54Z

0

By "Layout", I assume you mean "Activity". You have a number of options to pass data between activities, all of which are explained nicely on this question: How do I pass data between Activities in Android application?

edited May 23, 2017 at 12:18

CommunityBot

11 silver badge

answered Apr 13, 2013 at 15:49

IncrediApp

10.4k2 gold badges35 silver badges24 bronze badges

Collectives™ on Stack Overflow

problems sending 2d array to another layout android eclipse java

2 Answers 2

2 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related