alz-ahm

ImageView.doSomething(otherArguments){
  //we have direct access to all image view properties (width, height, etc.) here
  //Also this will refer to image view
}

alz-ahm

//Calling Static method
MyUtil.doSomethingOnImage(imageView, otherArguments)

//Calling extension method
imageView.doSomething(otherArguments)

alz-ahm

//Without extension
Toast.makeText(this, “Hello”, Toast.LENGTH_SHORT).show()

//With Extension
showToast("Hello")

//Extension Method
fun Context.showToast(text: CharSequence, duration: Int = Toast.LENGTH_SHORT) {
    Toast.makeText(this, text, duration).show()
}

alz-ahm

//Without Extension
view1.setOnClickListener...
view2.setOnClickListener...
viewN.setOnClickListener...

//With Extension
constraintGroup.setAllOnClickListener {
    
}

alz-ahm

//without extension
liveData.value = liveData.value

//With extension
liveData.notifyObservers()

//Extension function
fun <T> MutableLiveData<T>.notifyObservers() {
    value = value //resetting the value forces to notify observers
}

alz-ahm

//Without extension
inputET.addTextChangedListener(object:  TextWatcher {
    override fun afterTextChanged(s: Editable?) {

    }

    override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {

    }

alz-ahm

//Withoug extension
Picasso.get().load(/* image url */).placeholder(/* placeholder */).into(myImageView)

//With extension
myImageView.load(/* image url */)

//Extension definition
fun ImageView.load(path: String) {
    val placeholder = R.id.whatEver
    var fullPath = path

alz-ahm

//Using helper methods in ViewModel is right
fun getAdminAccesssVisibility(): Int {
    return if(/** some condition **/) View.VISIBLE else View.GONE
}

alz-ahm

//This is right!! 
viewModel.adminAccessVisibility.observe(this, Observer {
    myView.visibility = it
})

alz-ahm

//This is right!! 
viewModel.adminAccessVisibility.observe(this, Observer {
    myView.visibility = it
})