Loading data from internet (JSON)

Android Processing

zotzot

Loading data from internet (JSON)

in Android Processing • 1 year ago

Hi to all.

i've created a small app to explore twitter friendship.

it works well on desktop.

Loading it on a samsung Tab 10.1, it returns this error:

android.os.NetworkOnMainThreadException

i've read some articles about it, understanding (in simple words) that newer version of android (3.0 +) won't allow networking in the main thread, to avoid to block the application during the loading.

it makes sense to me. but as i'm just sketching out some ideas and i won't bother to create a multithread superfine application, i'm wondering if there's a way to disable this feature.

i've found on stackoverflow this solution (for java applications). it states to add these lines:

StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);

as i don't really know how this sort of things work i tried to put it in the setup() function.

it loads without errors, but it don't solve the problem.

maybe isn't the right solution for processing.

any suggestion on how to solve the problem?

Replies(1)

zotzot

Re: Loading data from internet (JSON)

1 year ago

ok,

i found out that multithread code is quite simple, so i implemented it.

following this fry's old but working gude, i've created a thread class calling it from the main thread.

i repost it here:

// in your app:
ThreadThing tt = new ThreadThing(this);
tt.start();
// the thread class:
public class ThreadThing implements Runnable {
Thread thread;
public ThreadThing(PApplet parent) {
parent.registerDispose(this);
}
public void start() {
thread = new Thread(this);
thread.start();
}
public void run() {
// do something threaded here
}
public void stop() {
thread = null;
}
// this will magically be called by the parent once the user hits stop
// this functionality hasn't been tested heavily so if it doesn't work, file a bug
public void dispose() {
stop();
}
}

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