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android-awesome-libraries

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Support

private void displayName(@NonNull String name) {
  // name can not be null
}
private void receiveDrawableRes(@DrawableRes int resId) {
  // resId must be Drawable Resource ID
}
mButton.setOnClickListener((View v) -> {
    // do something here
});
  • icepick - Android Instance State made easy
@Icicle String username; // This will be automatically saved and restored

@Override public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  Icepick.restoreInstanceState(this, savedInstanceState);
}

@Override public void onSaveInstanceState(Bundle outState) {
  super.onSaveInstanceState(outState);
  Icepick.saveInstanceState(this, outState);
}
  • Michelangelo - Layout inflation library for Android based on annotations
@InflateLayout(R.layout.custom_view)
public class MyCustomView extends FrameLayout {

    public MyCustomView(Context context) {
        super(context);
    }

    @AfterInflate
    public void updateTextView() {
        ((TextView) findViewById(R.id.my_text_view)).setText("hey!");
    }
}
@Background
void someBackgroundWork(String aParam, long anotherParam) {
    [...]
}
@UiThread
void doInUiThread(String aParam, long anotherParam) {
    [...]
}
gridView.addHeaderView(View v);
  • HeaderFooterGridView - HeaderFooterGridView supports adding header rows and footer rows to GridView
final HeaderFooterGridView headerFooterGridView = (HeaderFooterGridView) findViewById(R.id.HeaderFooterGridView);
 
HeaderView headerView = new HeaderView(context);
headerFooterGridView.addHeaderView(headerView);
 
FooterView footerView = new FooterView(context);
headerFooterGridView.addFooterView(footerView);

mAdapter = new HeaderFooterGridViewAdapter(this);
headerFooterGridView.setAdapter(mAdapter);

Network

RequestQueue queue = Volley.newRequestQueue(this);
String url = "SOMEURL";

JsonObjectRequest jsObjRequest = new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JSONObject>() {
  @Override
  public void onResponse(JSONObject response) {
    // TODO
  }
}, new Response.ErrorListener() {
  @Override
  public void onErrorResponse(VolleyError error) {
    // TODO
  }
});

queue.add(jsObjRequest);
Ion.with(context)
.load("http://example.com/thing.json")
.asJsonObject()
.setCallback(new FutureCallback<JsonObject>() {
   @Override
    public void onCompleted(Exception e, JsonObject result) {
        // do stuff with the result or error
    }
});
  • okhttp - An HTTP+SPDY client for Android and Java applications
OkHttpClient client = new OkHttpClient();

String run(String url) throws IOException {
  Request request = new Request.Builder()
      .url(url)
      .build();

  Response response = client.newCall(request).execute();
  return response.body().string();
}

REST Client

public interface GitHubService {
  @GET("/users/{user}/repos")
  List<Repo> listRepos(@Path("user") String user);
}

Object Serialization

BagOfPrimitives obj = new BagOfPrimitives();
Gson gson = new Gson();
String json = gson.toJson(obj);  

Database

Category restaurants = new Category();
restaurants.name = "Restaurants";
restaurants.save();
List joes = userDao.queryBuilder()
  .where(Properties.FirstName.eq("Joe"))
  .orderAsc(Properties.LastName)
  .list();

Network Image Handling

Picasso.with(context).load("http://i.imgur.com/DvpvklR.png").into(imageView);
// Load image, decode it to Bitmap and display Bitmap in ImageView (or any other view 
//  which implements ImageAware interface)
imageLoader.displayImage(imageUri, imageView);
really configurable!
// DON'T COPY THIS CODE TO YOUR PROJECT! This is just example of ALL options using.
// See the sample project how to use ImageLoader correctly.
DisplayImageOptions options = new DisplayImageOptions.Builder()
        .showImageOnLoading(R.drawable.ic_stub) // resource or drawable
        .showImageForEmptyUri(R.drawable.ic_empty) // resource or drawable
        .showImageOnFail(R.drawable.ic_error) // resource or drawable
        .resetViewBeforeLoading(false)  // default
        .delayBeforeLoading(1000)
        .cacheInMemory(false) // default
        .cacheOnDisk(false) // default
        .preProcessor(...)
        .postProcessor(...)
        .extraForDownloader(...)
        .considerExifParams(false) // default
        .imageScaleType(ImageScaleType.IN_SAMPLE_POWER_OF_2) // default
        .bitmapConfig(Bitmap.Config.ARGB_8888) // default
        .decodingOptions(...)
        .displayer(new SimpleBitmapDisplayer()) // default
        .handler(new Handler()) // default
        .build();

Glide - An image loading and caching library for Android focused on smooth scrolling

Glide.with(this).load("http://goo.gl/h8qOq7").into(imageView);

Event Pub/Sub

eventBus.post(event);
eventBus.register(this);
public void onEvent(AnyEventType event) {
    // TODO: React to the event!
}
bus.post(new AnswerAvailableEvent(42));
@Subscribe public void answerAvailable(AnswerAvailableEvent event) {
    // TODO: React to the event somehow!
}

Gesture

Utility

  • Bolts - a collection of low-level libraries designed to make developing mobile apps easier
final ParseQuery<ParseObject> query = ParseQuery.getQuery("Student");
query.orderByDescending("gpa");
findAsync(query).onSuccessTask(new Continuation<List<ParseObject>, Task<ParseObject>>() {
  public Task<ParseObject> then(Task<List<ParseObject>> task) throws Exception {
    List<ParseObject> students = task.getResult();
    students.get(0).put("valedictorian", true);
    return saveAsync(students.get(0));
  }
}).onSuccessTask(new Continuation<ParseObject, Task<List<ParseObject>>>() {
  public Task<List<ParseObject>> then(Task<ParseObject> task) throws Exception{
    ParseObject valedictorian = task.getResult();
    return findAsync(query);
  }
}).onSuccessTask(new Continuation<List<ParseObject>, Task<ParseObject>>() {
  public Task<ParseObject> then(Task<List<ParseObject>> task) throws Exception {
    List<ParseObject> students = task.getResult();
    students.get(1).put("salutatorian", true);
    return saveAsync(students.get(1));
  }
}).onSuccess(new Continuation<ParseObject, Void>() {
  public Void then(Task<ParseObject> task) throws Exception {
    // Everything is done!
    return null;
  }
});
Router.sharedRouter().map("users/:id", UserActivity.class);
Router.sharedRouter().map("users/new/:name/:zip", NewUserActivity.class);
Router.sharedRouter().open("users/16");
Router.sharedRouter().open("users/new/Clay/94303");
  • android-intents - A collection of well-known Android intents for most common actions
Intent intent = IntentUtils.sendEmail(to, subject, body);
startActivity(Intent.createChooser(intent, "TEST"));
  • GAlette - Tracking events with Google Analytics by annotations
@SendEvent(category = "HelloWorld", action = "sayHello", label="%1$s")
String sayHello (String name) {
  return format("Hello, %s.", name);
}
  • Paraphrase - compile-safe format string builders.
<string name="greeting">Hello, {other_name}! My name is {my_name}.</string>
CharSequence greeting = Phrase.greeting()
    .other_name("GitHub user")
    .my_name("Jake Wharton")
    .build(this);
  • esperandro - Easy SharedPreference Engine foR ANDROid
String superFancyPreference = preferences.superFancyPreferenceKey()
preferences.superFancyPreferenceKey(superFancyPreference)
public void onSendClick() {
    final String status = editText.getText().toString();
    if(status.trim().length() > 0) {
      jobManager.addJobInBackground(new PostTweetJob(status));
      editText.setText("");
    }
}
@Required(order = 1)
@Email(order = 2)
private EditText emailEditText;

@Password(order = 3)
@TextRule(order = 4, minLength = 6, message = "Enter at least 6 characters.")
private EditText passwordEditText;

@ConfirmPassword(order = 5)
private EditText confirmPasswordEditText;

@Checked(order = 6, message = "You must agree to the terms.")
private CheckBox iAgreeCheckBox;
MyObject myObject = new MyObject("foo");
cacheManager.put("myKey", myObject);
mGPUImage = new GPUImage(this);
mGPUImage.setGLSurfaceView((GLSurfaceView) findViewById(R.id.surfaceView));
mGPUImage.setImage(imageUri); // this loads image on the current thread, should be run in a thread
mGPUImage.setFilter(new GPUImageSepiaFilter());
  • Amalgam - Common codes for Android
ToastUtils.showOnUiThread(activity, "SOMESTRING", Toast.LENGTH_SHORT);
isMainThread() // Check if current thread is the main thread.
checkout.start();
// you only need this if this activity starts purchase process
checkout.createPurchaseFlow(new PurchaseListener());
// you only need this if this activity needs information about purchases/SKUs
inventory = checkout.loadInventory();
inventory.whenLoaded(new InventoryLoadedListener())
new AsyncJob.AsyncJobBuilder<Boolean>()
        .doInBackground(new AsyncJob.AsyncAction<Boolean>() {
            @Override
            public Boolean doAsync() {
                // Do some background work
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                return true;
            }
        })
        .doWhenFinished(new AsyncJob.AsyncResultAction<Boolean>() {
            @Override
            public void onResult(Boolean result) {
                Toast.makeText(context, "Result was: " + result, Toast.LENGTH_SHORT).show();
        }
}).create().start();

Cloud Handling

  • Driven - A unified API calls for different cloud storage providers
StorageProvider provider = new Dropbox();
provider.authenticate(credentials);

// list all files in the root
provider.listAsync(new Task<List<DrivenFile>>(){
  public void onComplete(List<DrivenFile> files){
    ...
  }
});

Social Network Handling

mSocialNetworkManager = (SocialNetworkManager) getFragmentManager().findFragmentByTag(SOCIAL_NETWORK_TAG);

if (mSocialNetworkManager == null) {
    mSocialNetworkManager = SocialNetworkManager.Builder.from(getActivity())
            .twitter(<< TWITTER  API TOKEN  >>, << TWITTER  API SECRET  >>)
            .linkedIn(<< LINKED_IN  API TOKEN  >>, << LINKED_IN API TOKEN  >>, "r_basicprofile+rw_nus+r_network+w_messages")
            .facebook()
            .googlePlus()
            .build();
    getFragmentManager().beginTransaction().add(mSocialNetworkManager, SOCIAL_NETWORK_TAG).commit();
}

DI

@InjectView(R.id.user) EditText username;
@InjectView(R.id.pass) EditText password;

@OnClick(R.id.submit) void submit() {
  // TODO call server...
}
@Inject
Thermosiphon(Heater heater) {
  this.heater = heater;
}

View Model Binding

public StringObservable message = new StringObservable();
...
message.set("Hello MVVM!"); // will change the model and view

UI

  • PhotoView - ImageView for Android that supports zooming, by various touch gestures.

AdapterViewAnimator animator = new AdapterViewAnimator(adapterView);
data.add(item);
adapter.notifyDataSetChanged();
animator.animate();

Album handling

  • RoboGuice

Rx

Subscription sub = Observable.from(1, 2, 3, 4, 5)
    .subscribeOn(Schedulers.newThread())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe(observer);

Promise

Deferred deferred = new DeferredObject();
Promise promise = deferred.promise();
promise.done(new DoneCallback() {
  public void onDone(Object result) {
    ...
  }
}).fail(new FailCallback() {
  public void onFail(Object rejection) {
    ...
  }
}).progress(new ProgressCallback() {
  public void onProgress(Object progress) {
    ...
  }
}).always(new AlwaysCallback() {
  public void onAlways(State state, Object result, Object rejection) {
    ...
  }
});

Security

  • Conceal - Fast cryptographic operations for Android by Facebook

Debug Utility

@DebugLog
public String getName(String first, String last) {
  SystemClock.sleep(15); // Don't ever really do this!
  return first + " " + last;
}

  • dspec - An easy way to draw UI specs on top of your Android UI

Gradle Plugin

Testing

Unit

def "should display hello text"() {
    given:
    def textView = new TextView(Robolectric.application)

    and:
    def hello = "Hello"

    when:
    textView.setText(hello)

    then:
    textView.getText() == hello
}
        

Assert

assertThat(frodo.getName()).isEqualTo("Frodo");
assertThat(frodo).isNotEqualTo(sauron)
                 .isIn(fellowshipOfTheRing);
assertThat(sauron).isNotIn(fellowshipOfTheRing);

Fixture

Factory.define(
        // This will guess the User class
        new Definition(User.class) {
            @Override
            public Bundle set(Bundle attrs) {
                attrs.putString("name", "John");
                attrs.putBoolean("admin", false);
                return attrs;
            }
        // This will use the User class (Adming would have been guessed)
        }, new Definition(User.class, "admin") {
            @Override
            public Bundle set(Bundle attrs) {
                attrs.putString("name", "Admin");
                attrs.putBoolean("admin", true);
                return attrs;
            }
        });

Mock

LinkedList mockedList = mock(LinkedList.class);
when(mockedList.get(0)).thenReturn("first");
when(mockedList.get(1)).thenThrow(new RuntimeException());

UI Test

public void testSayHello() {
  onView(withId(R.id.name_field))
    .perform(typeText("Steve"));
  onView(withId(R.id.greet_button))
    .perform(click());
  onView(withText("Hello Steve!"))
    .check(matches(isDisplayed()));
}

Others

buck - A high-performance Android & Java build tool

Documentation

doclava

Contribution

Just fork & edit & send pull-request on GitHub!

####Policy

  1. Official Website over GitHub Repository for links.
  2. Should put codes which reflects the library.
  3. For UI libraries, put demonstorations (AniGIF, PNG, Movies).

And I am considering to ...

  1. Put reference links for each libraries.
  2. Separate pages for each categories.
  3. Separate UI categories.

####Maintainer

kaiinui (https://github.com/kaiinui)

####and...

I am building a website to browse awesome libraries! https://github.com/kaiinui/droidgems

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