MVVM with Android - this is exciting!

13th May 2015By DawidAndroid

This is one of the best things I've seen on Android in a long time: MVVM architecture. Of course, Android platform doesn't support it, but there is hope! RoboBinding. OK, the spec perhaps isn't the best, but the idea is great! Finally

This is how simple it is with Android Studio:

buildscript {
    repositories {
        mavenCentral()
        maven() {
            name 'RoboBinding AspectJPlugin Maven Repository'
            url "https://github.com/RoboBinding/RoboBinding-aspectj-plugin/raw/master/mavenRepo"
            //url "file://D:/git/RoboBinding-aspectj-plugin/mavenRepo"
        }
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:1.+'
        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.+'
        classpath 'org.robobinding:aspectj-plugin:0.8.4'
    }
}

apply plugin: 'com.android.application'
apply plugin: 'com.neenbedankt.android-apt'
apply plugin: 'org.robobinding.android-aspectj'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.1"

    defaultConfig {
        minSdkVersion 8
        targetSdkVersion 21

        testApplicationId 'org.robobinding.albumsampletest'
        testInstrumentationRunner "android.test.InstrumentationTestRunner"
        testHandleProfiling true
        testFunctionalTest true
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_6
        targetCompatibility JavaVersion.VERSION_1_6
    }

    lintOptions {
        disable 'UnusedAttribute', 'ValidFragment', 'GradleDependency', 'OnClick', 'MissingPrefix', 'MenuTitle'
    }

    signingConfigs {
        release {
            storeFile file('robobinding.keystore')
            storePassword '123456'
            keyAlias 'robobinding'
            keyPassword '123456'
        }
    }

    buildTypes {
        release {
            minifyEnabled true
            proguardFiles 'proguard-rules.txt'
            signingConfig signingConfigs.release
        }
    }
}

repositories {
    mavenCentral()
    maven() {
        name 'SonaType snapshot repository'
        url 'https://oss.sonatype.org/content/repositories/snapshots'
        //url "file://D:/git/RoboBinding/framework/mavenRepo"
    }
    /*
   maven() {
        name 'RoboBinding Framework Maven Repository'
        url "file://D:/git/RoboBinding/framework/mavenRepo"
    }
    maven() {
        name 'RoboBinding CodeGen Maven Repository'
        url "file://D:/git/RoboBinding/codegen/mavenRepo"
    }*/
}

ext {
    robobindingVersion = 'latest.integration'
    //robobindingVersion = '0.8.8'
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:22.1.1'
    compile ("org.robobinding:robobinding:$robobindingVersion:with-aop-and-dependencies") {
        exclude group: 'com.google.guava', module: 'guava'
    }
    //aspectPath fileTree(dir: 'libs', include: '*.jar')
    aspectPath ("org.robobinding:robobinding:$robobindingVersion:with-aop-and-dependencies") {
        exclude group: 'com.google.guava', module: 'guava'
    }
    apt "org.robobinding:codegen:$robobindingVersion"

    androidTestCompile 'com.jayway.android.robotium:robotium-solo:5.2.1'
}

buildscript {

repositories {

mavenCentral()

maven() {

name 'RoboBinding AspectJPlugin Maven Repository'

url "https://github.com/RoboBinding/RoboBinding-aspectj-plugin/raw/master/mavenRepo"

//url "file://D:/git/RoboBinding-aspectj-plugin/mavenRepo"

}

dependencies {

classpath 'com.android.tools.build:gradle:1.+'

classpath 'com.neenbedankt.gradle.plugins:android-apt:1.+'

classpath 'org.robobinding:aspectj-plugin:0.8.4'

}

apply plugin: 'com.android.application'

apply plugin: 'com.neenbedankt.android-apt'

apply plugin: 'org.robobinding.android-aspectj'

android {

compileSdkVersion 21

buildToolsVersion "21.1.1"

defaultConfig {

minSdkVersion 8

targetSdkVersion 21

testApplicationId 'org.robobinding.albumsampletest'

testInstrumentationRunner "android.test.InstrumentationTestRunner"

testHandleProfiling true

testFunctionalTest true

}

compileOptions {

sourceCompatibility JavaVersion.VERSION_1_6

targetCompatibility JavaVersion.VERSION_1_6

}

lintOptions {

disable 'UnusedAttribute', 'ValidFragment', 'GradleDependency', 'OnClick', 'MissingPrefix', 'MenuTitle'

}

signingConfigs {

release {

storeFile file('robobinding.keystore')

storePassword '123456'

keyAlias 'robobinding'

keyPassword '123456'

}

buildTypes {

release {

minifyEnabled true

proguardFiles 'proguard-rules.txt'

signingConfig signingConfigs.release

}

repositories {

mavenCentral()

maven() {

name 'SonaType snapshot repository'

url 'https://oss.sonatype.org/content/repositories/snapshots'

//url "file://D:/git/RoboBinding/framework/mavenRepo"

}

maven() {

name 'RoboBinding Framework Maven Repository'

url "file://D:/git/RoboBinding/framework/mavenRepo"

}

maven() {

name 'RoboBinding CodeGen Maven Repository'

url "file://D:/git/RoboBinding/codegen/mavenRepo"

}*/

}

ext {

robobindingVersion = 'latest.integration'

//robobindingVersion = '0.8.8'

}

dependencies {

compile fileTree(dir: 'libs', include: ['*.jar'])

compile 'com.android.support:appcompat-v7:22.1.1'

compile ("org.robobinding:robobinding:$robobindingVersion:with-aop-and-dependencies") {

exclude group: 'com.google.guava', module: 'guava'

}

//aspectPath fileTree(dir: 'libs', include: '*.jar')

aspectPath ("org.robobinding:robobinding:$robobindingVersion:with-aop-and-dependencies") {

exclude group: 'com.google.guava', module: 'guava'

}

apt "org.robobinding:codegen:$robobindingVersion"

androidTestCompile 'com.jayway.android.robotium:robotium-solo:5.2.1'

}

Activity code:

package com.example.associativelearning;

import android.app.Activity;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;

import viewmodels.MainActivityViewModel;
import org.robobinding.binder.Binders;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        MainActivityViewModel presentationModel = new MainActivityViewModel();
        View rootView = Binders.inflateAndBindWithoutPreInitializingViews(this,
                R.layout.activity_main,
                presentationModel);
        setContentView(rootView);
    }

}

package com.example.associativelearning;

import android.app.Activity;

import android.support.v7.app.ActionBarActivity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import viewmodels.MainActivityViewModel;

import org.robobinding.binder.Binders;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

MainActivityViewModel presentationModel = new MainActivityViewModel();

View rootView = Binders.inflateAndBindWithoutPreInitializingViews(this,

R.layout.activity_main,

presentationModel);

setContentView(rootView);

}

Your ViewModel:

@PresentationModel
public class MainActivityViewModel {

    private String text;

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }

}

@PresentationModel

public class MainActivityViewModel {

private String text;

public String getText() {

return text;

}

public void setText(String text) {

this.text = text;

}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:bind="http://robobinding.org/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"
    >

    <EditText
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        bind:text="${text}"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        bind:text="{text}"/>

</RelativeLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

xmlns:bind="http://robobinding.org/android"

android:layout_width="match_parent"

android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"

<EditText

android:layout_height="wrap_content"

android:layout_width="wrap_content"

bind:text="${text}"/>

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

bind:text="{text}"/>

</RelativeLayout>

What a beauty! Interestingly enough, the code doesn't work if you use ActionBarActivity. I am not sure why.

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MVVM with Android - this is exciting!

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