Tutorials and more

Tuesday, February 23, 2016

info Android Continous Integration

Continuous Integration

Goal is that every time you commit your code, your code automatically goes thru some Junit testing (iOS/Android) and also builds the apps (ipa/apk). CI helps improves the quality of the app. Ideally is nice to have one system when you can kick a build and also run your unit and integration tests. CI is key to have a great app :)

Good read: Tools used by other companies:
Android Jenkins aws
Read to learn about CI Jenkins vs. Circle CI vs Travis

http://mtdevuk.com/2015/04/27/setting-up-a-jenkins-continuous-integration-environment-for-android/

***Good read Android and Jenkins

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My Opinion:
Most enterprise companies use Jenkins. For small companies I would suggest CircleCI($) or Travis($$$).

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Jenkins:

What is Jenkins?

Jenkins Plugin info (BUILD_NUMBER..)
Jenkins is an open source continuous integration tool which aims to automate certain tasks that developers find themselves repeating. It runs as a local server on a host machine

Tutorial by codepath
Setup:
1. Create Jenkins account.
2. Configure Jenkins:
Install Plugins: Manage Jenkins -> Manage Plugins -> Available

Gradle Plugin (build system)
Git Plugin (use git to link to your projects repos)
Android Emulator
AWS device farm (test apps with real devices using AWS Device farm)
HockeyApp (distribute apps)
Android lint plugin - Lint is a great tool created by Google to analyze the code for Android. It comes with the SDK of Android and it is useful to have good quality code.

3. Configure Git repo, ssh key.

4. Create new job to generate APK.

Enterprise Notes:
1. Create Jenkins account.
2. Install Android SDK in jenkins machine(node)
3. Install Plugins.
4. Configure Git Enterprise repo(master).
5. Test run to generate apk.

Tips
Jacoco Reporting

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Circleci:
Proof of Concept - Android Continuous Integration with gradlew and Circleci

Circleci uses the build file: circle.yml, you need to create and add this file to your project root.
Circleci builds apk and runs Espresso UI test(click button change text).
GitHub Project
Circleci Dashboard
Reference
Circleci iOS

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Travis:
Proof of Concept - Android Continuous Integration with gradlew and Travis

Monday, February 1, 2016

info Android Material

Good read about Material Design

Components:
snackbar

Drawables tutorial

info Android Testing (and iOS)

Wednesday, January 27, 2016

info Android Security

WIP. work in progress, I'm writing this post to help others interested in Android Security :) enjoy!

Good read:
http://strazzere.com/papers/AAP-QPSI.pdf

Pretty cool tool to find potential security vulnerabilities :)
http://android-arsenal.com/details/1/2769

other: http://android-arsenal.com/details/1/3046

Android Security Code:
https://www.airpair.com/android/posts/adding-tampering-detection-to-your-android-app
https://manifestsecurity.com/android-application-security-part-21/

Android Code:
http://www.codota.com/android/methods/android.widget.ImageView/setVisibility

Must Watch videos:
https://www.youtube.com/watch?v=18tn_mF4XRg&feature=youtu.be

**Hacking Android eBook (good info)
https://library.oreilly.com/book/9781785883149/hacking-android/toc

Thursday, January 7, 2016

SharedPreferences in Android [ put string and get string ]

PUT

private SharedPreferences sharedPreferences;

sharedPreferences.edit()
        .putString("KEY_NAME", name)
        .apply();

GET

String NameURL= getPref("KEY_NAME", getContext());

public static String getPref(String key, Context context) {
    SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);

  return preferences.getString(key, null);

Resources:

https://medium.com/google-developers/sharedpreferences-is-your-answer-to-simple-storage-a7c8499ea8ff#.7eoyjrjgi

Thursday, December 17, 2015

How to run Android App with latest Android tools

Google Android info

Android Styling:
https://blog.stylingandroid.com/percent-part-1/

Install latest Android Studio:

http://tools.android.com/preview-channel

Install latest Android emulator:

http://tools.android.com/tech-docs/emulator

Enable Instant run:

http://tools.android.com/tech-docs/instant-run

Google Android tech docs:

http://tools.android.com/tech-docs

Android developers blog
http://android-developers.blogspot.com/

Android best practices:
https://github.com/futurice/android-best-practices
http://guides.codepath.com/android

Android devices Dashboard(google)
https://developer.android.com/about/dashboards/index.html

SourceTree uncommit
http://flummox-engineering.blogspot.com/2014/10/how-to-undo-git-commit-in-sourcetree.html

Wednesday, December 16, 2015

Butterknife Library for Android

Butterknife

Is a view "injection" library for Android. It will reduces boilerplate code.

Example:

Add dependency to app/build.gradle

dependencies {
  compile 'com.jakewharton:butterknife:7.0.1'
}

In main.xml declare an image widget id name "image"
In main.java start using @Bind to declare each variable

public class Main extends AppCompatActivity {
private static final String ITENT_TAG= "chapter"; 
private Chapter chapter;
@Bind(R.id.button) Button myButton; 
@Bind(R.id.text) TextView myText;
@Bind(R.id.image) 
ImageView myImage;  
@Override public void onCreate(Bundle savedInstanceState) 
{

        super.onCreate(savedInstanceState);         setContentView(R.layout.activity_detail);         ButterKnife.bind(this); 
@OnClick(R.id.button)    protected void Toast(){

Toast.makeText(getApplicationContext(),"Hello Android Butter Knife",Toast.LENGTH_LONG).show();}
}

myText.setText("Hello!");
res = getResources();
 myImage.setImageDrawable(res.getDrawable(R.drawable.myimage));

Also initialize ButterKnife in OnCreate:

 ButterKnife.bind(this);

Resources:
http://www.sitepoint.com/tidying-code-with-android-butterknife/
https://guides.codepath.com/android/Reducing-View-Boilerplate-with-Butterknife

Tuesday, February 23, 2016

Monday, February 1, 2016

Wednesday, January 27, 2016

Thursday, January 7, 2016

Thursday, December 17, 2015

Wednesday, December 16, 2015

Butterknife

public class Main extends AppCompatActivity {private static final String ITENT_TAG= "chapter";

private Chapter chapter;

@Bind(R.id.button) Button myButton;

@Bind(R.id.text) TextView myText;

@Bind(R.id.image)

ImageView myImage;

@Override public void onCreate(Bundle savedInstanceState)

{ super.onCreate(savedInstanceState); setContentView(R.layout.activity_detail); ButterKnife.bind(this);

@OnClick(R.id.button) protected void Toast(){

Toast.makeText(getApplicationContext(),"Hello Android Butter Knife",Toast.LENGTH_LONG).show();}

myText.setText("Hello!");

res = getResources(); myImage.setImageDrawable(res.getDrawable(R.drawable.myimage));

public class Main extends AppCompatActivity {
private static final String ITENT_TAG= "chapter";

{
super.onCreate(savedInstanceState); setContentView(R.layout.activity_detail); ButterKnife.bind(this);

res = getResources();
myImage.setImageDrawable(res.getDrawable(R.drawable.myimage));