java - 从 return 方法读取数组值

Question

如何在不出现 nullexception 警告的情况下从另一个类方法中安全地读取我的两个数组值。我得到这两个值 orreclty 只是担心“Array access x[0] may produce NPE”警告而不使用 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];

  }

Answer 1

试试下面的代码

 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
   }
 }