How to read a return from a class - android

Question

I have doing a file from the server, and my idea is to pass the filesizedownloaded to a class and on my progressbar class get value to update the progress bar; I have a function that passes a value to a class

this is how i try to pass the value

new updateValue(fileSizeDownloaded);

value gets stored here public class updateValue{ private long v_value;

        public updateValue(long value) {
            v_value = value;
        }

        public long getV_value() { return v_value; };
    }

and from a different class I'm trying to get the value of getV_value but I keep getting an error; update(long) in update cannot be applied to 0

How can i get the value stored :/ all this is on mainactivity.java

updateValue value = new updateValue();
value.getV_value();

Answer 1

What you can do is create a new class and extend Application

public class yourcalss extends Application {
      public long getValue() {
            return value;
        }

        public void setValue(long value_e) {
            value = value_e;
        }
}

This is how you save the value

final yourcalss value = (yourcalss ) getApplicationContext();
value.setValue(fileSizeDownloaded);

and this is how you can access the value

final yourcalss val = (yourcalss ) getApplicationContext();
final Long v = val.getValue(); 

and manifiest

<application android:name="yourcalss