How to shrink my expression with a ternary operator

Question

I would love to know how to shrink this code into 1 line with a ternator operator, the idea is change the drawable of a image inside my RecyclerView when its 1 or 0, I have done this but I think is not that performant to have multiple if elses to do it, instead I know that it can be done in just 1 line with a ternary operator.

 if(json.hasTime(mArrayList.get(mPosition))==1){
                    mHolder.imageEvent.setImageResource(R.drawable.ic_event_black_24dp);
                }else{
                    mHolder.imageEvent.setImageResource(R.drawable.ic_event_busy_black_24dp);
                }

I want to do something like this :

(if 1 or 0 ? value 1 : value2 );

Answer 1

尝试这个 ：

 mHolder.imageEvent.setImageResource(json.hasTime(mArrayList.get(mPosition))==1 ? R.drawable.ic_event_black_24dp : R.drawable.ic_event_busy_black_24dp);

Answer 2

You can always convert expressions from (1) to (2) like so,

//(1)
if(condition){
    stmt1;
}else{
    stmt2;
}

//(2)
somevariable = condition?stmt1:stmt2;

So your single line expression can be written as follows,

mHolder.imageEvent.setImageResource(json.hasTime(mArrayList.get(mPosition))==1?R.drawable.ic_event_black_24dp:R.drawable.ic_event_busy_black_24dp);

Answer 3

Something like this.

mHolder.imageEvent.setImageResource(json.hasTime(mArrayList.get(mPosition))==1? 
                               R.drawable.ic_event_black_24dp : R.drawable.ic_event_busy_black_24dp)

Answer 4

尝试这个：

    json.tieneHora(mArrayList.get(mPosition))==1?mHolder.imageEvent.setImageResource(R.drawable.ic_event_black_24dp):mHolder.imageEvent.setImageResource(R.drawable.ic_event_busy_black_24dp);