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AllUsefulOpenSourceResources

Some resources which can be used in future

Extremely Important:

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Some excellent material designs:

https://github.com/saulmm/Android-Material-Examples

Working with shared elements, explode transition, and animations

  • Playing with the new menu-to arrow toggle animattion added in the Support Library
  • Reusing an example to build a pretty effect like the tab slide of google play app
  • Using CircularReveal to show a pretty effect between activities
  • Replicating some parts of the lollypop dialer app basing on the material design principle: Motion provides meaning
  • Using StateListAnimator to change the elevation of a view smootly

Material design Floating Action Button:

https://github.com/makovkastar/FloatingActionButton

alt tag

Another Floating Button resource:

https://github.com/Clans/FloatingActionButton

https://github.com/shell-software/fab

Other Important Libraries

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Overview

There are many third-party libraries for Android but several of them are "must have" libraries that are extremely popular and are often used in almost any Android project. Each has different purposes but all of them make life as a developer much more pleasant. The major libraries are listed below in a few categories.

Standard Pack

This "standard pack" listed below are libraries that are quite popular, widely applicable and should probably be setup within most Android apps:

Name Description
Retrofit A type-safe REST client for Android which intelligently maps an API into a client interface using annotations.
Picasso A powerful image downloading and caching library for Android.
ButterKnife Using Java annotations, makes Android development better by simplifying common tasks.
Parceler Android Parcelable made easy through code generation
IcePick Android Instance State made easy
Crouton Context-sensitive, configurable alert notices much better than toasts
Hugo Easier logging using annotations
LeakCanary Catch memory leaks in your apps

Keep in mind that the combination of these libraries may not always play nicely with each other. The following section highlights some of these issues.

Parceler and IcePick

Note that you cannot use IcePick at the current time to save state of Parceler objects. See this GitHub issue for more context. You will need to use Parcelable objects with IcePick.

ButterKnife and Parceler

Using the Butterknife library with the Parceler library causes multiple declarations of javax.annotation.processing.Processor. In this case, you have to exclude this conflict in your app/build.gradle file:

   packagingOptions {

        exclude 'META-INF/services/javax.annotation.processing.Processor'  // butterknife
    }

ButterKnife and Custom Views

Often you may find that using Butterknife or Dagger injections defined in your constructor prevent Android Studio to preview your Custom View layout. You may see an error about needing isEditMode() defined. Essentially this method is used to enable your code to short-circuit before executing a section of code that might be used for run-time but cannot be executed within the preview window.

  public ContentEditorView(Context context, AttributeSet attrs) {
        super(context, attrs);

        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        inflater.inflate(R.layout.view_custom, this, true);

        // short circuit here inside the layout editor
        if(isInEditMode()) {
            return;
        }

        ButterKnife.inject(this);

Convenience

  • Dagger - A fast dependency injector for Android and Java. See this video intro from Square.
  • AutoParcel - Port of Google AutoValue for Android with Parcelable generation goodies.
  • Hugo - Easier logging within your app
  • Logger - Much cleaner and easier logcat trace messages
  • Trikita Log - Tiny logger backwards compatible with android.util.Log, but supporting format strings, comma-separated values, non-android JVMs, optional tags etc
  • LeakCanary - Easily catch memory leaks as they occur
  • AndroidAnnotations - Framework that speeds up Android development. It takes care of the plumbing, and lets you concentrate on what's really important. By simplifying your code, it facilitates its maintenance
  • RoboGuice - Powerful extensions to Android using dependency injection.
  • Calligraphy - Custom fonts made easy
  • AndroidViewAnimations - Common property animations made easy
  • SDK Manager Plugin - Helpful plugin especially for group projects if you're missing an SDK version, haven't downloaded an API version, or your support library is updated.

Extensions

  • Otto - An enhanced Guava-based event bus with emphasis on Android support
  • EventBus - Android optimized event bus that simplifies communication between components.
  • Tape - Tape is a collection of queue-related classes for Android and Java
  • RxJava - Reactive Extensions for the JVM
  • Priority JobQueue - Easier background tasks
  • ACRA - Crash reporting made easy and free. Check the setup instructions and open-source backend.

Networking

  • Retrofit - A type-safe REST client for Android and Java which intelligently maps an API into a client interface using annotations.
  • Picasso - A powerful image downloading and caching library for Android.
  • Ion - Powerful asynchronous networking library. Download as a jar here.
  • Android Async HTTP - Asynchronous networking client for loading remote content such as JSON.
  • Volley - Google's HTTP library that makes networking for Android apps easier and most importantly, faster.
  • Glide - Picasso image loading alternative endorsed by Google
  • [IceNet] (https://github.com/anton46/IceNet) - Android networking wrapper consisting of a combination of Volley, OkHttp and Gson
  • Android Universal Image Loader - Popular alternative for image loading that can replace Picasso or Glide.

ListView

Easy Navigation

UI Components

Drawing

Scanning

Persistence

Compatibility

Resources

Check out the following resources for finding libraries:

References

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