How can I initialize a variable in Android class?

Question

I have a problem when I initialize my LOC or LAT variables, app crashes, where is the problem?

public final class MyLocationListener  implements LocationListener {

Context c;
Camera mycam =Camera.open(1);
Float[] LOC;
Float[] LAT;


public MyLocationListener(Context context) {
     c= context;

     // read all file & spiting them

     String DataPoints = read_db("gpspoints");
     DataPoints.trim();
     String []ar=DataPoints.split("&");

     String[] twovar=ar[2].split("/");
     this.LOC[1]=(float) 1;
     this.LAT[1]=(float) 1;

     //end of read and Split
}

Strings are immutable. It should be DataPoints = DataPoints.trim(); — Alexis C.
– Alexis C., Commented Jan 11, 2014 at 13:11

Niklas · Accepted Answer · 2015-06-12 14:50:39Z

1

Put

this.LAT = new Float[2];
this.LOC = new Float[2];

Before

this.LOC[1]= (float) 1;
this.LAT[1]= (float) 1;

The problem is you wanna set a value in an array, but you have not initialised the array.

edited Jun 12, 2015 at 14:50

answered Jan 11, 2014 at 13:17

Niklas

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2 Comments

Niklas Over a year ago

The problem is you wanna set a value in an array, but you have not initialised the array.

Niklas Over a year ago

@user3185049 we have to use 2, because the array index starts at 0 and you want to set the value of the index 1.

T McKeown · Accepted Answer · 2014-01-11 13:17:51Z

0

Try this:

this.LOC[0]=(float) 1;
this.LAT[0]=(float) 1;

answered Jan 11, 2014 at 13:17

T McKeown

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