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Uso de Jetpack Compose para algunos componentes básicos en Android Studio. Original: Dr. Ricardo Armando Machorro Reyes
Tipo: Ejercicios
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package com.areyesm.componente import android.util.Log import androidx.compose.foundation.Image import androidx.compose.foundation.clickable import androidx.compose.foundation.layout.Arrangement import androidx.compose.foundation.layout.Column import androidx.compose.foundation.layout.Row import androidx.compose.foundation.layout.Spacer import androidx.compose.foundation.layout.aspectRatio import androidx.compose.foundation.layout.fillMaxSize import androidx.compose.foundation.layout.fillMaxWidth import androidx.compose.foundation.layout.height import androidx.compose.foundation.layout.padding import androidx.compose.foundation.layout.size import androidx.compose.foundation.layout.width import androidx.compose.foundation.rememberScrollState import androidx.compose.foundation.shape. CircleShape import androidx.compose.foundation.text.input.InputTransformation.Companion.keyb oardOptions import androidx.compose.foundation.verticalScroll import androidx.compose.material3.Card import androidx.compose.material3.HorizontalDivider import androidx.compose.material3.MaterialTheme import androidx.compose.material3.OutlinedTextField import androidx.compose.material3.Text import androidx.compose.material3.TextField import androidx.compose.runtime.Composable import androidx.compose.runtime.getValue import androidx.compose.runtime.mutableStateOf import androidx.compose.runtime.remember import androidx.compose.runtime.setValue import androidx.compose.ui.Modifier import androidx.compose.ui.geometry.Offset import androidx.compose.ui.graphics.Color import androidx.compose.ui.graphics.Shadow import androidx.compose.ui.text.SpanStyle import androidx.compose.ui.text.TextStyle import androidx.compose.ui.text.buildAnnotatedString import androidx.compose.ui.text.font.FontStyle import androidx.compose.ui.text.font.FontWeight import androidx.compose.ui.text.input.KeyboardType import androidx.compose.ui.text.input.PasswordVisualTransformation import androidx.compose.ui.text.input.VisualTransformation import androidx.compose.ui.text.style.TextAlign import androidx.compose.ui.text.style.TextOverflow import androidx.compose.ui.text.withStyle import androidx.compose.ui.unit.dp import androidx.compose.ui.unit.sp import androidx.compose.foundation.text.KeyboardOptions import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled. Clear import androidx.compose.material.icons.filled. Close import androidx.compose.material.icons.filled. Done import androidx.compose.material.icons.filled. Settings import androidx.compose.material.icons.filled. ShoppingCart import androidx.compose.material.icons.filled. Visibility import androidx.compose.material.icons.filled. VisibilityOff import androidx.compose.material3.AssistChip import androidx.compose.material3.AssistChipDefaults import androidx.compose.material3.Badge import androidx.compose.material3.BadgedBox import androidx.compose.material3.Button import androidx.compose.material3.ButtonDefaults import androidx.compose.material3.Checkbox import androidx.compose.material3.FilterChip import androidx.compose.material3.FilterChipDefaults import androidx.compose.material3.Icon import androidx.compose.material3.IconButton import androidx.compose.material3.OutlinedButton import androidx.compose.material3.SuggestionChip import androidx.compose.material3.Switch import androidx.compose.material3.TextButton import androidx.compose.ui.Alignment import androidx.compose.ui.draw.BlurredEdgeTreatment import androidx.compose.ui.draw.blur import androidx.compose.ui.draw.clip import androidx.compose.ui.layout.ContentScale import androidx.compose.ui.res.painterResource import androidx.compose.ui.res.stringResource import androidx.compose.ui.semantics. contentDescription import androidx.compose.ui.semantics.semantics import com.areyesm.componentes.R @Composable fun Componentes() { Card(modifier = Modifier
. fillMaxSize () . padding ( 18. dp ) . verticalScroll (rememberScrollState())) { NewTextView() CustomDivider() NewTextField() NewTextFieldOutlined() CustomDivider() NewImageView() CustomDivider() NewChip() CustomDivider() NewButton() CustomDivider() NewBadge() CustomDivider() NewChecks() CustomDivider() NewTextView() CustomDivider()
Icon(imageVector = Icons.Filled. ShoppingCart , contentDescription = "Cart") } } } } @Composable fun NewButton() { Row(horizontalArrangement = Arrangement.spacedBy( 16. dp )) { Button(onClick = {} ) { Text("Finish") } Button(onClick = { /TODO/ } ) { Icon(imageVector = Icons.Filled. Close , null, modifier = Modifier. size (ButtonDefaults.IconSize) ) Spacer(modifier = Modifier. size (ButtonDefaults.IconSpacing)) Text("Send") } OutlinedButton(onClick = { /TODO/ } ) { Text("Back") } TextButton(onClick = { /TODO/ } ) { Text("Exit") } } } @Composable fun NewChip() { Row(horizontalArrangement = Arrangement.spacedBy( 8. dp )) { SuggestionChip( onClick = { Log.d("SuggestionChip", "hello world") } , label = { Text("Suggestion Chip") } ) AssistChip( onClick = { Log.d("AssistChip", "Hola Mundo") } , label = { Text("Assist Chip") } , leadingIcon = { Icon( imageVector = Icons.Filled. Settings , contentDescription = "Localized description", modifier = Modifier. size (AssistChipDefaults.IconSize) ) } ) var selected by remember { mutableStateOf (false) } FilterChip( onClick = { selected = !selected } , label = { Text("Filter Chip") } , selected = selected, leadingIcon = if (selected) { { Icon( imageVector = Icons.Filled. Done , contentDescription = "Done icon", modifier = Modifier. size (FilterChipDefaults.IconSize) ) }
} else null ) //InputChipExample(text = "Nombre") {} } } @Composable fun NewImageView() { Row(horizontalArrangement = Arrangement.spacedBy( 28. dp )) { Image( painter = painterResource(R.drawable. upiicsa ), contentDescription = "Escudo", modifier = Modifier
. size ( 80. dp ) . clip ( CircleShape ) ) Image( painter = painterResource(R.drawable. upiicsa ), contentDescription = "Escudo", contentScale = ContentScale.Crop, modifier = Modifier . size ( 80. dp ) . aspectRatio (4F / 3F) ) Image( painter = painterResource(R.drawable. upiicsa ), contentDescription = "Escudo", modifier = Modifier . size ( 80. dp ) //.blur(radius = 8.dp, edgeTreatment = BlurredEdgeTreatment.Unbounded) . blur (radius = 8. dp , edgeTreatment = BlurredEdgeTreatment( CircleShape )) ///.blur(radius = 8.dp, edgeTreatment = BlurredEdgeTreatment(RoundedCornerShape(8.dp))) ) } } @Composable fun NewTextFieldOutlined() { var textValue by remember { mutableStateOf ("") } OutlinedTextField( value = textValue, onValueChange = { textValue = it } , label = { Text(text = stringResource(R.string. ciclo )) } , modifier = Modifier. fillMaxWidth () ) var passwordValue by remember { mutableStateOf ("") } OutlinedTextField( value = passwordValue, onValueChange = { passwordValue = it } , label = { Text(text = "Contraseña") } , visualTransformation = PasswordVisualTransformation(), trailingIcon = { if(passwordValue. isNotEmpty ()) { Icon(
var textValue by remember { mutableStateOf ("Hi") } TextField( value = textValue, onValueChange = { textValue = it } , label = { Text(text = "Escribe algo") } , modifier = Modifier. fillMaxWidth () ) } @Composable fun CustomDivider() { Spacer(modifier = Modifier. height ( 8. dp )) HorizontalDivider(Modifier. fillMaxWidth ()) Spacer(modifier = Modifier. height ( 16. dp )) } @Composable fun NewTextView() { Column { Text( text = "Jetpack Compose", color = Color.DarkGray, fontSize = 28. sp , fontStyle = FontStyle.Italic, fontWeight = FontWeight.Bold, style = TextStyle( shadow = Shadow( color = Color.Magenta, offset = Offset (2F, 2F), blurRadius = 4F ) ) ) Text( text = "The best Jetpack Compose Course Dispositivos Moviles by the Dr. Ricardo Armando M.R. All Reserved 2025", style = MaterialTheme.typography.bodyLarge, maxLines = 2 , overflow = TextOverflow.Ellipsis ) Text(text = buildAnnotatedString { withStyle ( style = SpanStyle( fontWeight = FontWeight.ExtraBold, fontStyle = FontStyle.Italic, fontSize = 18. sp ) ) { append("Batman") } append(", Bruce Wayne") } ) Text( text = "Let's go to the next one", modifier = Modifier. fillMaxWidth (), textAlign = TextAlign.Center,
style = MaterialTheme.typography.bodySmall ) } }
package com.areyesm.componentes import android.widget.Toast import androidx.compose.foundation.layout.Arrangement import androidx.compose.foundation.layout.Box import androidx.compose.foundation.layout.Column import androidx.compose.foundation.layout.fillMaxWidth import androidx.compose.foundation.layout.padding import androidx.compose.foundation.layout.wrapContentSize import androidx.compose.material.icons.Icons import androidx.compose.material.icons.filled. Add import androidx.compose.material.icons.filled. MoreVert import androidx.compose.material3.BottomAppBar import androidx.compose.material3.CenterAlignedTopAppBar import androidx.compose.material3.DropdownMenu import androidx.compose.material3.DropdownMenuItem import androidx.compose.material3.ExperimentalMaterial3Api import androidx.compose.material3.FloatingActionButton import androidx.compose.material3.Icon import androidx.compose.material3.IconButton import androidx.compose.material3.MaterialTheme import androidx.compose.material3.Scaffold import androidx.compose.material3.Text import androidx.compose.material3.TopAppBarDefaults.topAppBarColors import androidx.compose.runtime.Composable import androidx.compose.runtime.getValue import androidx.compose.runtime.mutableStateOf import androidx.compose.runtime.remember import androidx.compose.runtime.setValue import androidx.compose.ui.Alignment import androidx.compose.ui.Modifier import androidx.compose.ui.platform. LocalContext import androidx.compose.ui.text.style.TextAlign import androidx.compose.ui.unit.dp import androidx.compose.ui.unit.sp import kotlin.math.exp @OptIn(ExperimentalMaterial3Api::class) @Composable fun NewAppBars() { var intentos by remember { mutableStateOf ( 0 ) } Scaffold( topBar = { CenterAlignedTopAppBar( colors = topAppBarColors( containerColor = MaterialTheme.colorScheme.primaryContainer,
DropdownMenu( expanded = expanded, onDismissRequest = { expanded = false } ) { DropdownMenuItem( text = { Text("Load") } , onClick = { Toast.makeText(context, "Load", Toast. LENGTH_SHORT ).show() } ) DropdownMenuItem( text = { Text("Save") } , onClick = { Toast.makeText(context, "Save", Toast. LENGTH_SHORT ).show() } ) DropdownMenuItem( text = { Text("Load") } , onClick = { Toast.makeText(context, "Load", Toast. LENGTH_SHORT ).show() } ) DropdownMenuItem( text = { Text("Save") } , onClick = { Toast.makeText(context, "Save", Toast. LENGTH_SHORT ).show() } ) } } }
package com.areyesm.componentes import android.os.Bundle import androidx.activity.ComponentActivity import androidx.activity.compose.setContent import androidx.activity.enableEdgeToEdge import androidx.compose.foundation.layout.fillMaxSize import androidx.compose.foundation.layout.padding import androidx.compose.material3.Scaffold import androidx.compose.material3.Text import androidx.compose.runtime.Composable import androidx.compose.ui.Modifier import androidx.compose.ui.tooling.preview.Preview import com.areyesm.componentes.ui.theme.ComponentesTheme class MainActivity : ComponentActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) enableEdgeToEdge () setContent { ComponentesTheme { //Componentes() //NewAppBars() NewDropDownMenu() } } } }
