How to add distance in this For loop in Java/Android

Question

As from this page, distanceBetween() returns inaccurate result? I'm trying to calculate the distance from a user location everytime the user ismoving. How to make this for loop, if there is new results, add it to old result, then setText() it. I'm trying with ++ like this: tvJarak.setText(results[0]++ + ""); but did not work.

for (int z = 0; z < listPoints.size(); z++) {
    float[] results = new float[1];
    Location.distanceBetween(latStart, longStart, latB, longB, results);
    tvJarak.setText(results[0] + "");
}

i edit :

float[] results = new float[1000];
        for (int z = 0; z < listPoints.size(); z++) {
            Location.distanceBetween(latStart, longStart, latB, longB, results);
            results[0]+=results[1];
        }
        tvJarak.setText(results[0] + "");

it gives weird number randomly. it should be ++

calculate distance into a variable, and set text only after the cycle. You are missing Java basics. Please pass through some basic Java training before you continue. — Vladyslav Matviienko, Jul 25 '18 at 12:13
i edit my question, i try all method i can do, still i can not find way. — stuck, Jul 25 '18 at 13:43
you are still missing Java basics, as I said. You will have 1000 more such questions untill you know the basics — Vladyslav Matviienko, Jul 25 '18 at 13:47
i find no in Google for sum of arrays of floating point numbers.. that the array float come from results LatLng distance,, and this https://pastebin.com/tzDqCfLS code works but not incrementing as i wanted. i already learn as you say,.if you know what my problem is, please just say with one clue.i'll be happy gladly to seek out more from it. — stuck, Jul 26 '18 at 06:03

score 3 · Answer 1 · edited Jul 26 '18 at 04:01

3

Your Problem is, that results[0]++ adds one after setText() was executed.

Use ++result[0] instead. It will first add one and then execute setText().

edited Jul 26 '18 at 04:01

AskNilesh

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answered Jul 25 '18 at 12:14

Gurkonier

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How to add distance in this For loop in Java/Android

1 Answers1