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/*
When we do a longer running async operation that returns the callback on an Activity
like 
Asynctask<T,U, K>
AsyncTask is only for operations between the background thread and Main UI Thread.
the methods are 
void onPreExecute(){}
K doInBackground(T type1){
  ..
return type3_Object;

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import com.android.volley.toolbox.HurlStack;
import com.squareup.okhttp.OkHttpClient;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;

/**
 * An {@link com.android.volley.toolbox.HttpStack HttpStack} implementation which
 * uses OkHttp as its transport.
 */

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http://source.android.com/source/index.html

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How ButterKnife actually works?


Java Annotation Processing
Annotation processing is a tool build in javac for scanning and processing annotations at compile time.
You can define your own annotations and a custom processor to handle them.

Annotations are scanned and processed at compile time.

An Annotation Processor reads java code, process its annotations and generate java code in response.

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Guide for Dagger 2.0 (Revised Edition 5):

The steps are the following:

1.) add Dagger to your build.gradle files:

top level build.gradle:
.

// Top-level build file where you can add configuration options common to all sub-projects/modules.

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http://stackoverflow.com/questions/27036933/how-to-set-up-dagger-dependency-injection-from-scratch-in-android-project
http://siphon9.net/loune/2015/04/dagger-2-0-android-migration-tips/
https://github.com/google/dagger/issues/107#issuecomment-71524636
https://github.com/square/dagger/issues/379
http://code.tutsplus.com/tutorials/dependency-injection-with-dagger-2-on-android--cms-23345

https://github.com/joesteele/dagger2-component-scopes-test/blob/master/app/src/main/java/net/joesteele/daggercomponentstest/MainActivity.java
http://frogermcs.github.io/dagger-1-to-2-migration/
https://github.com/google/dagger/tree/master/examples/android-activity-graphs
https://speakerdeck.com/ogaclejapan/dagger2-has-been-released

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https://medium.com/@artem_zin/m-model-from-mvc-mvp-in-android-flow-and-mortar-bd1e50c45395#.fx16i7o50
http://magenic.com/Blog/Post/6/An-MVP-Pattern-for-Android
https://medium.com/ribot-labs/approaching-android-with-mvvm-8ceec02d5442#.pkip2bkyo
http://fernandocejas.com/2014/09/03/architecting-android-the-clean-way/
http://hannesdorfmann.com/android/mosby/
https://plus.google.com/communities/114285790907815804707
http://programmers.stackexchange.com/questions/133134/is-model-view-presenter-mvp-scheme-useful-for-android

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//BasePresenter.java 
public interface BasePresenter<V extends BaseView> {

    /**
     * Set or attach the view to this presenter
     */
    public void attachView(V view);

    /**
     * Will be called if the view has been destroyed. Typically this method will

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//BasePresenter.java 
public interface BasePresenter<V extends BaseView> {

    /**
     * Set or attach the view to this presenter
     */
    public void attachView(V view);

    /**
     * Will be called if the view has been destroyed. Typically this method will

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public class FlowLayout extends ViewGroup {
    public static final int HORIZONTAL = 0;
    public static final int VERTICAL = 1;

    private int horizontalSpacing = 0;
    private int verticalSpacing = 0;
    private int orientation = 0;
    private boolean debugDraw = false;