Reading array values from return method

Question

How can I safely read both of my array values from another class method without the nullexception warning coming up.I am getting both values orreclty just worried about the "Array access x[0] may produce NPE " warning without using intents

 public Class ImageUtility{

 public static String[] savePicture(Context context, Bitmap bitmap) {

  ......

   String[] arr = new String[2];
        arr[0] = img_name;
        arr[1] = img_path;

        return arr;
   }



public Class Others{

 public void Test(){
 String[] x = ImageUtility.savePicture(getActivity(), bitmap);
 value_one= x[0]; //nullexception warning is here
 value_two= x[1];

  }

check the length of x, if it is 0, there is something wrong with your method. — Ravi
– Ravi, Commented Jul 13, 2016 at 4:48
why would value_one= x[0]; give you a NPE even if x[0] is null? — Scary Wombat
– Scary Wombat, Commented Jul 13, 2016 at 4:48
@Cgx they are strings am collecting nothing to worry about there..both are not null — Bmbariah
– Bmbariah, Commented Jul 13, 2016 at 4:54
@Aeonia maybe it's a AsyncTask when you savePicture,so when you call test(), the savePicture not finished yet — Cgx
– Cgx, Commented Jul 13, 2016 at 4:57

Dehan Wjiesekara · Accepted Answer · 2016-07-13 05:14:56Z

1

Try the following code

 public void Test(){
   try{
     String[] x = ImageUtility.savePicture(getActivity(), bitmap);
     if(x != null && x.Length >= 1){
       value_one= x[0]; 
       value_two= x[1];
     }
   }catch(NullPointerException e){
     //print log
   }
 }

edited Jul 13, 2016 at 5:14

answered Jul 13, 2016 at 5:11

Dehan Wjiesekara

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3 Comments

Bmbariah Over a year ago

am now getting the warning Deference of x may produce NPE right at x.length

Dehan Wjiesekara Over a year ago

if(x != null && x.Length >= 1){

Bmbariah Over a year ago

Thanks..warning is no longer present

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