CODEWITHSUNDEEP
androidtoastandroid-context
Siva
Siva

Reputation: 9101

Context as used in toast

I have code like this

    package collfw;

public class A {
    int Eid;
    Context c1;

    public void setEid(int id) {
        if (id < 0) {
            Eid = 0;
        } else {
            Eid = id;
        }
    }

    public int getEid() {
        return Eid;
    }

    public contentvalues adddata()
    {
        contentvalues cv=new contentvalues()

        cv.put(ID,getEid());

        return cv;
    }

    public void retrivedata() {

        cursor c = db.rawquery("select * from employee");

        **Toast.maketext(c1, getEID, toast.Long_SHORT).show();**

    }
}

Here toast is giving me the error and logcat shows println can't be null and if in place of c1 if I use "context" then it is not accepting, Can anyone please explain me what is context and how can I use it here.

Upvotes: 0

Views: 96

Answers (4)

itsrajesh4uguys
itsrajesh4uguys

Reputation: 4638

Use like below if you will call retrievedata method directly from other activity or classed 

 public void retrivedata(Context c1) {

        cursor c = db.rawquery("select * from employee");

        **Toast.maketext(c1, getEID, toast.Long_SHORT).show();**

    }

Else Create the constructor for class A with the Context as the argument. 

Context c1;
Public A(Context ccc)
{
c1=ccc;
}

then use the c1 wherever in your Class A

Hope this will help you.

Upvotes: 0

Gunaseelan
Gunaseelan

Reputation: 15525

You have to initialize your c1. Then only it will work.

public A(Context context) {
        c1 = context;       
    }

Because toast is like a message it will dispaly on Activity. So you have to initialize your context with your activity's context

I hope this will help you.

Upvotes: 1

Lazy Ninja
Lazy Ninja

Reputation: 22527

Toast.maketext(c1, getEID, toast.Long_SHORT).show();

c1 is probably not set. At least I dont see it set on your class. Add something like this:

public A(Context ctx){
    c1 = ctx;
}

Upvotes: 0

No_Rulz
No_Rulz

Reputation: 2719

Use, 

Toast.makeText(getApplicationContext(), getEID, Toast.Long_SHORT).show();

Upvotes: 0

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