compile 'com.google.android.gms:play-services-tasks:9.6.1'
Task<TResult> call(Callable<TResult> callable) Task<TResult> call(Executor executor, Callable<TResult> callable)
public class CarlyCallable implements Callable<String> { @Override public String call() throws Exception { return "Call me maybe"; } }
Task<String> task = Tasks.call(new CarlyCallable());
public class SeparateWays implements Continuation<String, List<String>> { @Override public List<String> then(Task<String> task) throws Exception { return Arrays.asList(task.getResult().split(" +")); } }
public class AllShookUp implements Continuation<List<String>, List<String>> { @Override public List<String> then(@NonNull Task<List<String>> task) throws Exception { // Randomize a copy of the List, not the input List itself, since it could be immutable final ArrayList<String> shookUp = new ArrayList<>(task.getResult()); Collections.shuffle(shookUp); return shookUp; } }
private static class ComeTogether implements Continuation<List<String>, String> { @Override public String then(@NonNull Task<List<String>> task) throws Exception { StringBuilder sb = new StringBuilder(); for (String word : task.getResult()) { if (sb.length() > 0) { sb.append(' '); } sb.append(word); } return sb.toString(); } }
Task<String> playlist = Tasks.call(new CarlyCallable()) .continueWith(new SeparateWays()) .continueWith(new AllShookUp()) .continueWith(new ComeTogether()); playlist.addOnSuccessListener(new OnSuccessListener<String>() { @Override public void onSuccess(String message) { // The final String with all the words randomized is here } });
Executor executor = ... // you decide! Task<String> playlist = Tasks.call(executor, new CarlyCallable()) .continueWith(executor, new SeparateWays()) .continueWith(executor, new AllShookUp()) .continueWith(executor, new ComeTogether()); playlist.addOnSuccessListener(executor, new OnSuccessListener() { @Override public void onSuccess(String message) { // Do something with the output of this playlist! } });
Task<List<String>> split_task = Tasks.call(new CarlyCallable()) .continueWith(executor, new SeparateWays()); split_task = .continueWith(executor, new AllShookUp()) .continueWith(executor, new ComeTogether()); split_task.addOnCompleteListener(executor, new OnCompleteListener<List<String>>() { @Override public void onComplete(@NonNull Task<List<String>> task) { // Find the number of words just by checking the size of the List int size = task.getResult().size(); } }); playlist.addOnCompleteListener( /* as before... */ );
