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package com.app.googleformsapp | |
import android.os.Bundle | |
import androidx.activity.ComponentActivity | |
import androidx.activity.compose.setContent | |
import androidx.compose.animation.ExperimentalAnimationApi | |
import androidx.compose.foundation.clickable | |
import androidx.compose.foundation.layout.Box | |
import androidx.compose.foundation.layout.Column | |
import androidx.compose.foundation.layout.fillMaxSize | |
import androidx.compose.foundation.layout.fillMaxWidth | |
import androidx.compose.material.* | |
import androidx.compose.runtime.* | |
import androidx.compose.ui.Modifier | |
import com.app.googleformsapp.ui.theme.GoogleFormsAppTheme | |
//This fakes out what a sample response from a server would be if we were building a Google Forms app | |
val networkResponse1 = listOf("name", "address") | |
// This is a fake second response. Even though it looks similar to the above, it should be considered an entirely new response from the server | |
val networkResponse2 = listOf("name", "address", "nickname") | |
var currentCall by mutableStateOf(1) | |
class MainActivity : ComponentActivity() { | |
@OptIn(ExperimentalAnimationApi::class) | |
override fun onCreate(savedInstanceState: Bundle?) { | |
super.onCreate(savedInstanceState) | |
setContent { | |
GoogleFormsAppTheme { | |
val myState = remember { MyState() } | |
Surface( | |
modifier = Modifier.fillMaxSize(), | |
color = MaterialTheme.colors.background | |
) { | |
Column { | |
Button(onClick = { | |
// Button click pretends to be a network call. We clear the response first and add all new form fields from the server | |
if (currentCall == 1) { | |
myState.list.clear() | |
myState.list.addAll(networkResponse1.map { it.mapToMyFormFields() }) | |
currentCall++ | |
} else { | |
myState.list.clear() | |
myState.list.addAll(networkResponse2.map { it.mapToMyFormFields() }) | |
} | |
}) { | |
Text(text = "Make network call: $currentCall") | |
} | |
myState.list.forEach { | |
Box(Modifier.clickable { | |
it.label = it.text | |
it.text = "Adam powell" | |
}) { | |
MyInputField( | |
modifier = Modifier.fillMaxWidth(), | |
label = it.label, | |
value = it.text, | |
error = it.isError | |
) | |
} | |
} | |
} | |
} | |
} | |
} | |
} | |
} | |
// This maps from "network" models (which are just strings) into MyFormField models | |
private fun String.mapToMyFormFields(): MyFormField { | |
if (this == "name") { | |
return MyFormField(this, text = "This should be your name") | |
} else if (this == "address") { | |
return MyFormField(this, text = "Where you live") | |
} else if (this == "nickname") { | |
return MyFormField(this, text = "What can I call you alt") | |
} | |
return MyFormField(this, text = "not found") | |
} | |
//The state of my screen | |
class MyState { | |
var list = mutableStateListOf<MyFormField>() | |
} | |
// The representation of a form field | |
class MyFormField( | |
val id: String = "", | |
label: String = "", | |
val type: String = "", | |
text: String = "" | |
) { | |
var label by mutableStateOf(label) | |
var text by mutableStateOf(text) | |
var isError by mutableStateOf(false) | |
} | |
@ExperimentalAnimationApi | |
@Composable | |
fun MyInputField( | |
modifier: Modifier, | |
label: String, | |
value: String, | |
error: Boolean, | |
) { | |
Column(modifier = modifier) { | |
Box() { | |
OutlinedTextField( | |
modifier = Modifier.fillMaxWidth(1f), | |
value = value, | |
onValueChange = { }, | |
enabled = false, | |
label = | |
if (label.isNotEmpty()) { | |
{ Text(text = label) } | |
} else { | |
null | |
}, | |
isError = error, | |
singleLine = true, | |
) | |
} | |
} | |
} |
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