I want to use custom colors defined in the colors.xml class directly without using the Material theme colors or the default theme provided by the Jetpack. Is there any straightforward way to do it?
You can use colorResource()
which loads a color resource.
Text(
text = "Hello World",
color = colorResource(R.color.purple_200)
)
To use color in jetpack compose using recommended create a package ui.theme in com.<domain_name>.<app_name> which will likely be present by default if you are creating empty compose project. Now create Color.kt and Theme.kt kotlin files if they are not present in your project.
In Color.kt add the colors you need
package com.<domain_name>.<app_name>.ui.theme
import androidx.compose.ui.graphics.Color
val Purple200 = Color(0xFFBB86FC)
val Purple500 = Color(0xFF6200EE)
val Purple700 = Color(0xFF3700B3)
val Teal200 = Color(0xFF03DAC5)
val Flower = Color(0xFF4CAF50)
val Deer = Color(0xFFFF5722)
val Mango = Color(0xFFFF9800)
val AppbarColor = Color(0xFF2196F3)
Here is ready to use a Material Color template made by me
There are 3 common ways of using colors
Method 1 : Directly use color
import com.<domain_name>.<app_name>.ui.theme.*
Text(text = "Hello ", color = Flower)
Method 2 : Override default MaterialTheme colors
Now in, Theme.kt
private val DarkColorPalette = darkColors(
primary = Purple200,
primaryVariant = Purple700,
secondary = Teal200,
onBackground = Flower //Custom color
)
private val LightColorPalette = lightColors(
primary = Purple500,
primaryVariant = Purple700,
secondary = Teal200,
onBackground = Deer //Custom color
/* Other default colors to override
background = Color.White,
surface = Color.White,
onPrimary = Color.White,
onSecondary = Color.Black,
onBackground = Color.Black,
onSurface = Color.Black,
*/
)
@Composable
fun NotepadTheme(darkTheme: Boolean = isSystemInDarkTheme(),
content:@Composable() () -> Unit) {
val colors = if (darkTheme) {
DarkColorPalette
} else {
LightColorPalette
}
MaterialTheme(
colors = colors,
typography = Typography,
shapes = Shapes,
content = content
)
}
MainActivity.kt
class MainActivity : ComponentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
ColorApp()
}
}
}
@Composable
fun ColorApp() {
ColorTheme {
Surface(modifier = Modifier.fillMaxSize(),
color = MaterialTheme.colors.background) {
Greeting("Android")
}
}
}
@Composable
fun Greeting(name: String) {
Text(text = "Hello $name!", color = MaterialTheme.colors.onBackground) //Using color
}
@Preview(
showBackground = true, name = "Light mode",
uiMode = Configuration.UI_MODE_NIGHT_NO or
Configuration.UI_MODE_TYPE_NORMAL
)
@Preview(
showBackground = true, name = "Night mode",
uiMode = Configuration.UI_MODE_NIGHT_YES or
Configuration.UI_MODE_TYPE_NORMAL
)
@Composable
fun DefaultPreview() {
ColorApp()
}
Method 3 : Custom theme (Recommended method)
Text(text = "Hello ", color = AppNameTheme.colors.customColor)
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