Basic Use of This Library in Android Studio about bolts-android HOT 9 CLOSED

findAsync and saveAsync are fictional asynchronous methods, but are similar to ParseQuery#findInBackground() and ParseObject#saveInBackground() from the Parse-SDK-Android.

from bolts-android.

Gotcha, so to use it then, I have my own Async method (IE class someTask extends AsyncTask <Void, Void, Void> { ...stufff...} and then use the calls by replacing the findAsync in your examples with my someTask?

from bolts-android.

Kind of, but not really. Tasks do not depend on using AsyncTask anywhere, but they can be used together.

The most simple way of using Tasks to get something off onto a thread:

public Task<Void> doSomethingAsync() {
  return Task.call(() -> {
    // do some long running operations such as network operations
  }, Task.BACKGROUND_EXECUTOR);
};

If you want to do something upon completion of the asynchronous work, like you would with callbacks, you use continuations:

doSomethingAsync().continueWithTask((t) -> {
  if (t.isFaulted()) {
    // error case
  } else if (t.isCancelled()) {
    // canceled case
  } else {
    // success case
  }
  return t;
});

from bolts-android.

Ok, I have copied your example here exactly and am getting compiler errors with the doSomethingAsync().continueWithTask((t) call. It reads, "Lambda expressions are not supported at this language level". Is there something I am missing? Is the t a defined variable somewhere? Is there more to your expression but Android Studio cut it off?

from bolts-android.

Sorry I'm using Java 8 lambda short hand when typing these out.

(t) -> {
  // ...
}

can be replaced with

new Continuation<Void, Task<Void>>() {
  @Override public void done(Task<Void> t) {
    // ...
  }
}

from bolts-android.

Gotcha, perfect, that compiles and works just fine.
Just one more clarification Q for ya, if my goal is to run multiple server requests (Let's say I'm pinging a Rest API like 4 times), would I write 4 separate .continueWithTask((t) connected together and embed network calls within the inner-class? Or run 4 separate oSomethingAsync().continueWithTask()... calls?

from bolts-android.

That really depends on how you want to architect your API. If you're going to make asynchronous methods for each API call, you can chain them together using continueWithTask, but if this is a one off situation you can also have them all in a single Continuation.

from bolts-android.

I appreciate your time and expertise. Thank you for the help!

from bolts-android.

No problem, I'm glad I've been able to clear everything up! Have fun using Bolts 😄

from bolts-android.