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Add navigation3 snippets
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‎compose/snippets/build.gradle.kts‎

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@@ -95,6 +95,7 @@ dependencies {
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implementation(libs.androidx.compose.material3.adaptive.layout)
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implementation(libs.androidx.compose.material3.adaptive.navigation)
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implementation(libs.androidx.compose.material3.adaptive.navigation.suite)
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implementation(libs.androidx.compose.material3.windowsizeclass)
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implementation(libs.androidx.compose.material)
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implementation(libs.androidx.compose.runtime)
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implementation(libs.androidx.navigation.compose)
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implementation(libs.hilt.android)
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implementation(libs.androidx.hilt.navigation.compose)
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implementation(libs.kotlinx.serialization.core)
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implementation(libs.kotlinx.serialization.json)
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implementation(libs.androidx.compose.material3.adaptive.navigation3)
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implementation(libs.androidx.navigation3.runtime)
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implementation(libs.androidx.navigation3.ui)
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implementation(libs.androidx.lifecycle.viewmodel.navigation3)
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implementation(libs.androidx.recyclerview)
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‎compose/snippets/src/main/java/com/example/compose/snippets/navigation3/Content.kt‎

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/*
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* Copyright 2025 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.compose.snippets.navigation3
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import androidx.compose.animation.ExperimentalSharedTransitionApi
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import androidx.compose.foundation.background
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import androidx.compose.foundation.layout.Column
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import androidx.compose.foundation.layout.ColumnScope
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import androidx.compose.foundation.layout.fillMaxSize
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import androidx.compose.foundation.layout.padding
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import androidx.compose.foundation.shape.RoundedCornerShape
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import androidx.compose.material3.Button
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import androidx.compose.material3.Text
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import androidx.compose.runtime.Composable
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import androidx.compose.ui.Alignment
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import androidx.compose.ui.Modifier
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import androidx.compose.ui.draw.clip
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import androidx.compose.ui.graphics.Color
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import androidx.compose.ui.text.font.FontWeight
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import androidx.compose.ui.unit.dp
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import com.example.compose.snippets.ui.theme.PastelBlue
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import com.example.compose.snippets.ui.theme.PastelGreen
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import com.example.compose.snippets.ui.theme.PastelMauve
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import com.example.compose.snippets.ui.theme.PastelOrange
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import com.example.compose.snippets.ui.theme.PastelPink
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import com.example.compose.snippets.ui.theme.PastelPurple
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import com.example.compose.snippets.ui.theme.PastelRed
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import com.example.compose.snippets.ui.theme.PastelYellow
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@OptIn(ExperimentalSharedTransitionApi::class)
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@Composable
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fun ContentBase(
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title: String,
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modifier: Modifier = Modifier,
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onNext: (() -> Unit)? = null,
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content: (@Composable () -> Unit)? = null,
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) {
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Column(
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horizontalAlignment = Alignment.CenterHorizontally,
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modifier = modifier
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.fillMaxSize()
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.clip(RoundedCornerShape(48.dp))
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) {
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Title(title)
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if (content != null) content()
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if (onNext != null) {
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Button(
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modifier = Modifier.align(Alignment.CenterHorizontally),
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onClick = onNext
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) {
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Text("Next")
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}
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}
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}
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}
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@Composable
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fun ColumnScope.Title(title: String) {
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Text(
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modifier = Modifier
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.padding(24.dp)
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.align(Alignment.CenterHorizontally),
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fontWeight = FontWeight.Bold,
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text = title
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)
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}
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@Composable
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fun ContentRed(
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title: String,
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modifier: Modifier = Modifier,
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onNext: (() -> Unit)? = null,
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content: (@Composable () -> Unit)? = null,
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) = ContentBase(
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title = title,
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modifier = modifier.background(PastelRed),
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onNext = onNext,
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content = content
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)
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@Composable
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fun ContentOrange(
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title: String,
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modifier: Modifier = Modifier,
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onNext: (() -> Unit)? = null,
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content: (@Composable () -> Unit)? = null,
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) = ContentBase(
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title = title,
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modifier = modifier.background(PastelOrange),
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onNext = onNext,
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content = content
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)
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@Composable
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fun ContentYellow(
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title: String,
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modifier: Modifier = Modifier,
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onNext: (() -> Unit)? = null,
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content: (@Composable () -> Unit)? = null,
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) = ContentBase(
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title = title,
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modifier = modifier.background(PastelYellow),
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onNext = onNext,
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content = content
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)
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@Composable
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fun ContentGreen(
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title: String,
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modifier: Modifier = Modifier,
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onNext: (() -> Unit)? = null,
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content: (@Composable () -> Unit)? = null,
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) = ContentBase(
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title = title,
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modifier = modifier.background(PastelGreen),
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onNext = onNext,
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content = content
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)
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@Composable
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fun ContentBlue(
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title: String,
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modifier: Modifier = Modifier,
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onNext: (() -> Unit)? = null,
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content: (@Composable () -> Unit)? = null,
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) = ContentBase(
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title = title,
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modifier = modifier.background(PastelBlue),
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onNext = onNext,
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content = content
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)
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@Composable
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fun ContentMauve(
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title: String,
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modifier: Modifier = Modifier,
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onNext: (() -> Unit)? = null,
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content: (@Composable () -> Unit)? = null,
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) = ContentBase(
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title = title,
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modifier = modifier.background(PastelMauve),
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onNext = onNext,
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content = content
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)
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@Composable
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fun ContentPurple(
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title: String,
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modifier: Modifier = Modifier,
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onNext: (() -> Unit)? = null,
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content: (@Composable () -> Unit)? = null,
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) = ContentBase(
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title = title,
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modifier = modifier.background(PastelPurple),
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onNext = onNext,
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content = content
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)
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@Composable
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fun ContentPink(
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title: String,
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modifier: Modifier = Modifier,
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onNext: (() -> Unit)? = null,
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content: (@Composable () -> Unit)? = null,
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) = ContentBase(
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title = title,
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modifier = modifier.background(PastelPink),
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onNext = onNext,
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content = content
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)

‎compose/snippets/src/main/java/com/example/compose/snippets/navigation3/animations/AnimationSnippets.kt‎

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/*
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* Copyright 2025 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.compose.snippets.navigation3.animations
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import android.os.Bundle
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import androidx.activity.ComponentActivity
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import androidx.activity.compose.setContent
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import androidx.compose.animation.EnterTransition
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import androidx.compose.animation.ExitTransition
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import androidx.compose.animation.core.tween
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import androidx.compose.animation.slideInHorizontally
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import androidx.compose.animation.slideInVertically
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import androidx.compose.animation.slideOutHorizontally
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import androidx.compose.animation.slideOutVertically
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import androidx.compose.animation.togetherWith
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import androidx.compose.foundation.layout.padding
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import androidx.compose.material3.Button
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import androidx.compose.material3.Scaffold
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import androidx.compose.material3.Text
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import androidx.compose.ui.Modifier
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import androidx.navigation3.runtime.NavKey
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import androidx.navigation3.runtime.entry
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import androidx.navigation3.runtime.entryProvider
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import androidx.navigation3.runtime.rememberNavBackStack
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import androidx.navigation3.ui.NavDisplay
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import com.example.compose.snippets.navigation3.ContentGreen
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import com.example.compose.snippets.navigation3.ContentMauve
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import com.example.compose.snippets.navigation3.ContentOrange
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import kotlinx.serialization.Serializable
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// [START android_compose_navigation3_animations_1]
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@Serializable
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data object ScreenA : NavKey
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@Serializable
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data object ScreenB : NavKey
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@Serializable
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data object ScreenC : NavKey
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class AnimatedNavDisplayActivity : ComponentActivity() {
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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setContent {
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Scaffold { paddingValues ->
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val backStack = rememberNavBackStack(ScreenA)
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NavDisplay(
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backStack = backStack,
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onBack = { backStack.removeLastOrNull() },
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entryProvider = entryProvider {
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entry<ScreenA> {
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ContentOrange("This is Screen A") {
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Button(onClick = { backStack.add(ScreenB) }) {
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Text("Go to Screen B")
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}
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}
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}
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entry<ScreenB> {
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ContentMauve("This is Screen B") {
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Button(onClick = { backStack.add(ScreenC) }) {
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Text("Go to Screen C")
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}
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}
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}
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entry<ScreenC>(
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metadata = NavDisplay.transitionSpec {
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// Slide new content up, keeping the old content in place underneath
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slideInVertically(
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initialOffsetY = { it },
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animationSpec = tween(1000)
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) togetherWith ExitTransition.KeepUntilTransitionsFinished
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} + NavDisplay.popTransitionSpec {
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// Slide old content down, revealing the new content in place underneath
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EnterTransition.None togetherWith
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slideOutVertically(
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targetOffsetY = { it },
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animationSpec = tween(1000)
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)
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} + NavDisplay.predictivePopTransitionSpec {
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// Slide old content down, revealing the new content in place underneath
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EnterTransition.None togetherWith
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slideOutVertically(
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targetOffsetY = { it },
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animationSpec = tween(1000)
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)
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}
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){
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ContentGreen("This is Screen C")
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}
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},
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transitionSpec = {
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// Slide in from right when navigating forward
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slideInHorizontally(initialOffsetX = { it }) togetherWith
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slideOutHorizontally(targetOffsetX = { -it })
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},
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popTransitionSpec = {
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// Slide in from left when navigating back
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slideInHorizontally(initialOffsetX = { -it }) togetherWith
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slideOutHorizontally(targetOffsetX = { it })
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},
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predictivePopTransitionSpec = {
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// Slide in from left when navigating back
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slideInHorizontally(initialOffsetX = { -it }) togetherWith
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slideOutHorizontally(targetOffsetX = { it })
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},
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modifier = Modifier.padding(paddingValues)
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)
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}
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}
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}
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}
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// [END android_compose_navigation3_animations_1]

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