how to use helper class to send and receive data using intent in android

Question

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I want to fetch the data from previous activity (using getIntent) in a .java class and same the data to next activity through intent. can anyone help me how.Thanks in advance.

public class AddToCartHelper {

    public static void addToCart(Context context, Intent intent) {

        String TAG = "AddToCart";
        DecimalFormat decimalFormat;
        boolean loginflagforuser = false, loginflagforguest = false;

        String advId = "", num = "", uid = "", productName = "", emailCart = "",cartMessage = "";
        Double price = 0.0;
        Integer quantity = 1;

        SharedPreferences preferences = context.getSharedPreferences("SECRETFILE", Context.MODE_PRIVATE);

        loginflagforuser = preferences.getBoolean(Parameters.userEmail, false);
        loginflagforguest = preferences.getBoolean(Parameters.guestEmail, false);
        decimalFormat = new DecimalFormat("##.##");

        if (loginflagforuser){

            Intent fromCart = getIntent();
            //    imageId = fromCart.getStringExtra("image_url");
            advId = fromCart.getStringExtra("Advid");
            price = fromCart.getDoubleExtra("price", 0.0);
            num = fromCart.getStringExtra("num");
            uid = fromCart.getStringExtra("uid");
            Log.d(TAG, "--- REGISTERD UID::::::::: " + uid);
            quantity = fromCart.getIntExtra("quantity", 1);
            productName = fromCart.getStringExtra("cart_product_name");
            // total = fromCart.getDoubleExtra("total", 0.0);

            emailCart = preferences.getString("email", null);

        }else if (loginflagforguest){

        }else{

        }

    }
}

No I'm unable to get data. when i try getIntent(). It is throwing an error. — G Ganesh, Oct 17 '19 at 07:08
getIntent() cannot be called on nonactivity class. Capture the Intent first on your Activity class and send it to your nonactivity class. — L2_Paver, Oct 17 '19 at 07:28
You already declare the `Intent intent` as parameters in your addToCart methods but based on your code you didn' even use it. once you supply the correct intent on your method you can just directly call `advId = intent.getStringExtra("Advid");` without calling getIntent(). — L2_Paver, Oct 17 '19 at 07:35

score 1 · Answer 1 · answered Oct 17 '19 at 07:38

you don't need to use this Intent fromCart = getIntent();,because in constructor you already pass intent ,then just use intent object

dvId = intent.getStringExtra("Advid");
            price = intent.getDoubleExtra("price", 0.0);
            num = intent.getStringExtra("num");
            uid = intent.getStringExtra("uid");
            Log.d(TAG, "--- REGISTERD UID::::::::: " + uid);
            quantity = intent.getIntExtra("quantity", 1);
            productName = intent.getStringExtra("cart_product_name");
            // total = intent.getDoubleExtra("total", 0.0);

score 0 · Answer 2 · edited Oct 17 '19 at 07:16

0

there is two ways to passing the data to the next activity you can either use intent or can use local broadcast receiver

if you want to fetch data from the previous activity then use

String a= getIntent().getStringExtra( "");// pass the name that you used in the previous activity

edited Oct 17 '19 at 07:16

John Joe

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answered Oct 17 '19 at 07:08

rachna

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This was posted as an answer, but it does not attempt to answer the question. It should possibly be an edit, a comment, another question, or deleted altogether. – John Joe Oct 17 '19 at 07:08
I want to fetch data to a class not to activity. Activity -> .java class. ->Activity. Data passing and fetching should be done by a normal java class. – G Ganesh Oct 17 '19 at 07:16

score 0 · Accepted Answer · answered Oct 17 '19 at 07:18

0

You have already pass parameter intent to addToCart function, so instead of advId = fromCart.getStringExtra("Advid");, you can use advId = intent.getStringExtra("Advid");

answered Oct 17 '19 at 07:18

John Joe

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16
70
135

How to pass data from same java class to other Activity. – G Ganesh Oct 17 '19 at 11:36
https://stackoverflow.com/questions/2091465/how-do-i-pass-data-between-activities-in-android-application – John Joe Oct 18 '19 at 02:46

how to use helper class to send and receive data using intent in android

3 Answers3