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/* | |
* Copyright (C) 2023 The Android Open Source Project | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); | |
* you may not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* https://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, | |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
*/ | |
package com.example.woof | |
import android.os.Bundle | |
import androidx.activity.ComponentActivity | |
import androidx.activity.compose.setContent | |
import androidx.annotation.DrawableRes | |
import androidx.annotation.StringRes | |
import androidx.compose.foundation.Image | |
import androidx.compose.foundation.layout.Column | |
import androidx.compose.foundation.layout.Row | |
import androidx.compose.foundation.layout.fillMaxSize | |
import androidx.compose.foundation.layout.fillMaxWidth | |
import androidx.compose.foundation.layout.padding | |
import androidx.compose.foundation.layout.size | |
import androidx.compose.foundation.lazy.LazyColumn | |
import androidx.compose.foundation.lazy.items | |
import androidx.compose.material3.Card | |
import androidx.compose.material3.CenterAlignedTopAppBar | |
import androidx.compose.material3.ExperimentalMaterial3Api | |
import androidx.compose.material3.MaterialTheme | |
import androidx.compose.material3.Scaffold | |
import androidx.compose.material3.Surface | |
import androidx.compose.material3.Text | |
import androidx.compose.runtime.Composable | |
import androidx.compose.ui.Alignment | |
import androidx.compose.ui.Modifier | |
import androidx.compose.ui.draw.clip | |
import androidx.compose.ui.layout.ContentScale | |
import androidx.compose.ui.res.dimensionResource | |
import androidx.compose.ui.res.painterResource | |
import androidx.compose.ui.res.stringResource | |
import androidx.compose.ui.tooling.preview.Preview | |
import com.example.woof.data.Dog | |
import com.example.woof.data.dogs | |
import com.example.woof.ui.theme.WoofTheme | |
class MainActivity : ComponentActivity() { | |
override fun onCreate(savedInstanceState: Bundle?) { | |
super.onCreate(savedInstanceState) | |
setContent { | |
WoofTheme { | |
// A surface container using the 'background' color from the theme | |
Surface( | |
modifier = Modifier.fillMaxSize() | |
) { | |
WoofApp() | |
} | |
} | |
} | |
} | |
} | |
/** | |
* Composable that displays an app bar and a list of dogs. | |
*/ | |
@Composable | |
fun WoofApp() { | |
Scaffold( | |
topBar = { | |
WoofTopAppBar() | |
} | |
) { it -> | |
LazyColumn(contentPadding = it) { | |
items(dogs) { | |
DogItem( | |
dog = it, | |
modifier = Modifier.padding(dimensionResource(R.dimen.padding_small)) | |
) | |
} | |
} | |
} | |
} | |
/** | |
* Composable that displays a list item containing a dog icon and their information. | |
* | |
* @param dog contains the data that populates the list item | |
* @param modifier modifiers to set to this composable | |
*/ | |
@Composable | |
fun DogItem( | |
dog: Dog, | |
modifier: Modifier = Modifier | |
) { | |
Card(modifier = modifier) { | |
Row( | |
modifier = Modifier | |
.fillMaxWidth() | |
.padding(dimensionResource(id = R.dimen.padding_small)) | |
) { | |
DogIcon(dog.imageResourceId) | |
DogInformation(dog.name, dog.age) | |
} | |
} | |
} | |
/** | |
* Composable that displays a photo of a dog. | |
* | |
* @param dogIcon is the resource ID for the image of the dog | |
* @param modifier modifiers to set to this composable | |
*/ | |
@Composable | |
fun DogIcon( | |
@DrawableRes dogIcon: Int, | |
modifier: Modifier = Modifier | |
) { | |
Image( | |
modifier = modifier | |
.size(dimensionResource(R.dimen.image_size)) | |
.padding(dimensionResource(R.dimen.padding_small)) | |
.clip(MaterialTheme.shapes.small), | |
contentScale = ContentScale.Crop, | |
painter = painterResource(dogIcon), | |
// Content Description is not needed here - image is decorative, and setting a null content | |
// description allows accessibility services to skip this element during navigation. | |
contentDescription = null | |
) | |
} | |
/** | |
* Composable that displays a dog's name and age. | |
* | |
* @param dogName is the resource ID for the string of the dog's name | |
* @param dogAge is the Int that represents the dog's age | |
* @param modifier modifiers to set to this composable | |
*/ | |
@Composable | |
fun DogInformation( | |
@StringRes dogName: Int, | |
dogAge: Int, | |
modifier: Modifier = Modifier | |
) { | |
Column(modifier = modifier) { | |
Text( | |
text = stringResource(dogName), | |
style = MaterialTheme.typography.displayMedium, | |
modifier = Modifier.padding(top = dimensionResource(R.dimen.padding_small)) | |
) | |
Text( | |
text = stringResource(R.string.years_old, dogAge), | |
style = MaterialTheme.typography.bodyLarge | |
) | |
} | |
} | |
@OptIn(ExperimentalMaterial3Api::class) | |
@Composable | |
fun WoofTopAppBar(modifier: Modifier = Modifier) { | |
CenterAlignedTopAppBar( | |
title = { | |
Row( | |
verticalAlignment = Alignment.CenterVertically | |
) { | |
Image( | |
modifier = Modifier | |
.size(dimensionResource(id = R.dimen.image_size)) | |
.padding(dimensionResource(id = R.dimen.padding_small)), | |
painter = painterResource(R.drawable.ic_woof_logo), | |
contentDescription = null | |
) | |
Text( | |
text = stringResource(R.string.app_name), | |
style = MaterialTheme.typography.displayLarge | |
) | |
} | |
}, | |
modifier = modifier | |
) | |
} | |
/** | |
* Composable that displays what the UI of the app looks like in light theme in the design tab. | |
*/ | |
@Preview | |
@Composable | |
fun WoofPreview() { | |
WoofTheme(darkTheme = false) { | |
WoofApp() | |
} | |
} | |
@Preview | |
@Composable | |
fun WoofDarkThemePreview() { | |
WoofTheme(darkTheme = true) { | |
WoofApp() | |
} | |
} |
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