android assign one of two string variables into one string in another class

Question

I have 2 classes. in first one I have 2 button and 2 string.two button starts same class. but if user press first button I want to send first string into second class's string. if choose other one I want to send second string.

Main Class

public String sendedUrl;
String url = "xxx";
String url2="yyy";

  imageViews[0].setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            sendedUrl=url;
            Intent intent = new Intent(getApplicationContext(),Second.class);
            startActivity(intent);
            finish();
        }
    });
    imageViews[1].setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            sendedUrl = url2;
            Intent intent = new Intent(getApplicationContext(),Second.class);
            startActivity(intent);
            finish();
        }
    });

Second Class

MainActivity main = new MainActivity();
String Url;
Url = main.sendedUrl;

So what's error you are facing ? – PriyankaChauhan Sep 20 '16 at 12:10 — PriyankaChauhan, Sep 20 '16 at 12:10
Please search SO before posting new question :) – Nayan Srivastava Sep 20 '16 at 12:18 — Nayan Srivastava, Sep 20 '16 at 12:18

score 2 · Answer 1 · edited Sep 20 '16 at 13:43

2

When you creating an instance of a class the members of this class are set to null if you have not assigned any value to that particular member of that class.

You can make this member static or you can use

intent.putExtra("StringName");

to pass this member to other activity.

edited Sep 20 '16 at 13:43

RamenChef

5,557
11
31
43

answered Sep 20 '16 at 12:37

Arun Dey

186
4

score 0 · Answer 2 · edited Sep 20 '16 at 12:30

You have to use Bundle to passing values like:

imageViews[0].setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            sendedUrl=url;
            Intent intent = new Intent(getApplicationContext(),Second.class);
            intent.putExtra("strUrl", url);
            startActivity(intent);
            finish();
        }
    });
    imageViews[1].setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            sendedUrl = url2;
            Intent intent = new Intent(getApplicationContext(),Second.class);
            intent.putExtra("strUrl", url2);
            startActivity(intent);
            finish();
        }
    });

Inside your Second Activity in OnCreate():

Bundle extras = intent.getExtras(); 
String url= extras.getString("strUrl");

score 0 · Answer 3 · edited Sep 20 '16 at 12:43

0

If Main and Second class are Activities u can pass URL intent. e.g

Intent intent=new Intent(this,Second.class);
intent.putExtra("URL",url)//url2 on 2nd button click
startActivity(intent);
finish();

and get URL in Second Activity

Intent  intent=getIntent();
String URL=intent.getStringExtra("URL");

edited Sep 20 '16 at 12:43

Nayan Srivastava

3,655
3
27
49

answered Sep 20 '16 at 12:17

Developer

183
8

android assign one of two string variables into one string in another class

3 Answers3