virendersran01 / jetbmicalculator

This is a sample app(For beginners - App #2) built using Jetpack Compose. It demonstrates the concept of State Hoisting in Jetpack Compose.

JetBMICalculator

This is a sample app(For beginners - App #2) built using Jetpack Compose. It demonstrates the concept of State Hoisting in Jetpack Compose.

There are two forms on the screen and hence two composables for the same.

Top : BMI Calculator Form

Bottom: BMI Result Form

MainContent() {

  BMICalculatorForm()

  BMIResultForm()  
}

Height and Weight are the two states used by BMI Calculator form composable, however these are local to this composable. Hence not hoisted by parent composable (MainContent()). Only when Calculate button is clicked, latest value is passed via onClick.

However, other two states - showBmiResult and bmiResult - are modified by actions inside BMICalculatorForm(), but are used by BMIResultForm() to display on UI. Hence both of these are hoisted by their parent composable (MainContent()).