How can I check the condition to show the text from makeText

Question

I want to show "Favorite is empty" when there is no data to retrieve. However, it only work for else statement and it doesn't work in if statement . How can I check it is empty or not. I want to do like this the program will work as I coded when user click the button. But if there is not data to work when user click the button, program should show text from if statement

Here is my code

if(wishlist_item.size()>=1){
                    L1.setOnClickListener(new View.OnClickListener() {
                        String a = wishlist_item.get(0);
                        @Override
                        public void onClick(View view) {
                            if(a.isEmpty()){
                                Toast.makeText(wish_list.this, "Favourite is empty", Toast.LENGTH_SHORT).show();
                            }else{
                                Intent launchWish = new Intent(wish_list.this,web_view2.class);
                                launchWish.putExtra("k",a);
                                startActivity(launchWish);
                            }
                        }
                    });
                }

"it only work for else statement" what do you mean by that? that it always go straight to else? have you debugged your code? have you add some basic prints/loggings just to check the values of the variables you are comparing? — Stultuske, Feb 02 '21 at 07:17
else statement work if there is data to show in database. But if statement doesn't work if there is not data to show in database. I want to show the text message like "no book" if user click the button and no data @Stultuske — Indi Indo, Feb 02 '21 at 07:20
ok, so what is your point? the comparison works perfect, your Toast.makeText call just doesn't do what you think it should do? — Stultuske, Feb 02 '21 at 07:21
I think if (a.isEmpty) it should work or is there anything that I need to add more in if (a.isEmpty) this code? @Stultuske — Indi Indo, Feb 02 '21 at 07:39
we don't even know what your code should do. We also don't know what value a has at that point. You are very unclear in what is actually going wrong — Stultuske, Feb 02 '21 at 07:51
Does this answer your question? [How can I show makeText text if variable is empty](https://stackoverflow.com/questions/66006511/how-can-i-show-maketext-text-if-variable-is-empty) — Toygur Ziya Kutlu, Feb 02 '21 at 10:58

score 0 · Answer 1 · answered Feb 02 '21 at 07:22

0

if(a.isEmpty()){

most likely a.isEmpty is not working you've got to find another method to ascertain if a is empty or not

HTH traja47

answered Feb 02 '21 at 07:22

Trajano Roberto

179
2
7

can you tell me the similar work way or other way to show @Trajano Roberto – Indi Indo Feb 02 '21 at 07:39
how can check if a is empty or not @Trajano Roberto – Indi Indo Feb 02 '21 at 07:48
you've got to search on google the technology you are using; example in JavaScript = https://stackoverflow.com/questions/11743392/check-if-an-array-is-empty-or-exists – Trajano Roberto Feb 03 '21 at 00:27

score 0 · Accepted Answer · answered Feb 02 '21 at 14:24

Like this?

L1.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        if(wishlist_item.size() > 0) {
            Intent launchWish = new Intent(wish_list.this,web_view2.class);
            String a = wishlist_item.get(0);
            launchWish.putExtra("k",a);
            startActivity(launchWish);
        } else {
            Toast.makeText(wish_list.this, "Favourite is empty", Toast.LENGTH_SHORT).show();
        }
    }
});

Thanks bro @Darkman I really appreciate your help – Indi Indo Feb 03 '21 at 13:13 — Indi Indo, Feb 03 '21 at 13:13

How can I check the condition to show the text from makeText

2 Answers2