Android Data Binding Command


Source link: https://github.com/radzio/android-data-binding-command

Android Data Binding Command

Command design pattern implementation for Android Data Binding

Demo

How to start?

Step 1. Add it in your root build.gradle at the end of repositories:

 allprojects {

repositories {

 ...
 maven {
 url "https://jitpack.io" 
}

}
  
}

Step 2. Add the dependency

 dependencies {

 compile 'com.github.radzio:android-data-binding-command:1.0.4'  
}

Share this release:

Make sure that you are using Android Data Binding

  • In your main build.gradle you have gradle plugin 1.5.0 or newer:
classpath 'com.android.tools.build:gradle:1.5.0'
  • In your app build.gradle you've enabled databinding:
 dataBinding {

enabled = true
  
}

Add to your code

Modify your layout, add bind:command="@{ viewModel.myCommand } "


  <android.support.design.widget.FloatingActionButton

 bind:command="@{
viewModel.myCommand
}
"

 android:id="@+id/fab"

 android:layout_width="wrap_content"

 android:layout_height="wrap_content"

 android:layout_gravity="bottom|end"

 android:layout_margin="@dimen/fab_margin"

 android:src="@android:drawable/ic_dialog_email"/>

Add in your binding class

 public ICommand myCommand = new Command()
  {

@Override

public void execute()

{

 MainActivityViewModel.this.view.showMessage("Hello from Command!");

}

  
}
;

Command features

Each command implements ICommand interface

 public interface ICommand extends Observable
  {

@Bindable

boolean isEnabled();

  void isEnabled(boolean isEnabled);

  @Bindable

boolean isRefreshing();

  void isRefreshing(boolean isRefreshing);

  void execute();

  
}

You can use isEnabled and isRefreshing properties in your java code and xml layouts:

  <Button

 android:layout_width="wrap_content"

 android:layout_height="wrap_content"

 android:id="@+id/button2"

 android:layout_below="@+id/button"

 bind:command="@{
viewModel.enableButtonCommand
}
"

 android:text="@{
viewModel.buttonCommand.enabled ? `Disable Timer` : `Enable Timer`
}
"

 android:enabled="@{
viewModel.buttonCommand.refreshing == false
}
"

 android:layout_centerHorizontal="true"/>

Resources

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