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Adding cronet sample
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‎sample/cronet/app/build.gradle.kts‎

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import java.util.Properties
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plugins {
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alias(libs.plugins.android.application)
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alias(libs.plugins.kotlin.android)
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alias(libs.plugins.kotlin.compose)
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id("com.datadoghq.dd-sdk-android-gradle-plugin")
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}
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val localProperties = Properties().apply {
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val localPropertiesFile = rootProject.file("local.properties")
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if (localPropertiesFile.exists()) {
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load(localPropertiesFile.inputStream())
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}
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}
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android {
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namespace = "com.datadog.cronet.sample"
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compileSdk = 36
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defaultConfig {
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applicationId = "com.datadog.cronet.sample"
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minSdk = 24
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targetSdk = 36
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versionCode = 1
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versionName = "1.0"
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testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
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buildConfigField(
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"String",
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"DD_APP_ID",
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"\"${localProperties.getProperty("DD_APP_ID", "")}\""
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)
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buildConfigField(
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"String",
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"DD_API_TOKEN",
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"\"${localProperties.getProperty("DD_API_TOKEN", "")}\""
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)
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}
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compileOptions {
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sourceCompatibility = JavaVersion.VERSION_11
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targetCompatibility = JavaVersion.VERSION_11
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}
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kotlinOptions {
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jvmTarget = "11"
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}
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buildFeatures {
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compose = true
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buildConfig = true
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}
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}
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dependencies {
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implementation(libs.bundles.core)
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implementation(libs.bundles.compose)
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implementation(libs.bundles.datadog)
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implementation(libs.play.services.cronet)
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implementation(platform(libs.androidx.compose.bom))
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}

‎sample/cronet/app/proguard-rules.pro‎

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# Add project specific ProGuard rules here.
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# You can control the set of applied configuration files using the
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# proguardFiles setting in build.gradle.
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#
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# For more details, see
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# http://developer.android.com/guide/developing/tools/proguard.html
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# If your project uses WebView with JS, uncomment the following
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# and specify the fully qualified class name to the JavaScript interface
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# class:
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#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
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# public *;
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#}
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# Uncomment this to preserve the line number information for
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# debugging stack traces.
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#-keepattributes SourceFile,LineNumberTable
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# If you keep the line number information, uncomment this to
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# hide the original source file name.
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#-renamesourcefileattribute SourceFile

‎sample/cronet/app/src/main/AndroidManifest.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android">
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<uses-permission android:name="android.permission.INTERNET" />
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<application
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android:name=".SampleApplication"
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android:icon="@android:mipmap/sym_def_app_icon"
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android:label="@string/app_name">
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<activity
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android:name=".MainActivity"
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android:exported="true"
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android:label="@string/app_name">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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</application>
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</manifest>

‎sample/cronet/app/src/main/java/com/datadog/cronet/sample/MainActivity.kt‎

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package com.datadog.cronet.sample
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import android.graphics.BitmapFactory
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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.activity.enableEdgeToEdge
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import androidx.compose.foundation.Image
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import androidx.compose.foundation.layout.Arrangement
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import androidx.compose.foundation.layout.Column
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import androidx.compose.foundation.layout.Spacer
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import androidx.compose.foundation.layout.fillMaxSize
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import androidx.compose.foundation.layout.fillMaxWidth
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import androidx.compose.foundation.layout.height
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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.CircularProgressIndicator
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import androidx.compose.material3.MaterialTheme
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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.runtime.Composable
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import androidx.compose.runtime.getValue
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import androidx.compose.runtime.mutableStateOf
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import androidx.compose.runtime.remember
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import androidx.compose.runtime.setValue
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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.graphics.ImageBitmap
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import androidx.compose.ui.graphics.asImageBitmap
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import androidx.compose.ui.unit.dp
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import org.chromium.net.CronetEngine
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import org.chromium.net.CronetException
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import org.chromium.net.UrlRequest
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import org.chromium.net.UrlResponseInfo
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import java.nio.ByteBuffer
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import java.util.concurrent.Executors
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class MainActivity : ComponentActivity() {
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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enableEdgeToEdge()
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setContent {
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MaterialTheme {
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Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->
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ImageDownloaderScreen(
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cronetEngine = (application as SampleApplication).cronetEngine,
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modifier = Modifier.padding(innerPadding)
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)
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}
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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 ImageDownloaderScreen(
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cronetEngine: CronetEngine,
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modifier: Modifier = Modifier
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) {
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var imageBitmap by remember { mutableStateOf<ImageBitmap?>(null) }
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var isLoading by remember { mutableStateOf(false) }
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var errorMessage by remember { mutableStateOf<String?>(null) }
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Column(
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modifier = modifier
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.fillMaxSize()
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.padding(16.dp),
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horizontalAlignment = Alignment.CenterHorizontally,
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verticalArrangement = Arrangement.Center
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) {
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Button(
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onClick = {
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isLoading = true
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errorMessage = null
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downloadImage(
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cronetEngine = cronetEngine,
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url = "https://storage.googleapis.com/cronet/sun.jpg",
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onSuccess = { bitmap ->
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imageBitmap = bitmap
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isLoading = false
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},
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onError = { error ->
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errorMessage = error
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isLoading = false
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}
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)
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},
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enabled = !isLoading
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) {
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Text("Download Image")
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}
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Spacer(modifier = Modifier.height(16.dp))
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when {
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isLoading -> {
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CircularProgressIndicator()
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}
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errorMessage != null -> {
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Text("Error: $errorMessage")
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}
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imageBitmap != null -> {
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Image(
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bitmap = imageBitmap!!,
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contentDescription = "Downloaded image",
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modifier = Modifier.fillMaxWidth()
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)
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}
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}
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}
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}
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private fun downloadImage(
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cronetEngine: CronetEngine,
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url: String,
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onSuccess: (ImageBitmap) -> Unit,
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onError: (String) -> Unit
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) {
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val executor = Executors.newSingleThreadExecutor()
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val byteArrayOutputStream = mutableListOf<ByteArray>()
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val callback = object : UrlRequest.Callback() {
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override fun onRedirectReceived(
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request: UrlRequest,
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info: UrlResponseInfo,
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newLocationUrl: String
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) {
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request.followRedirect()
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}
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override fun onResponseStarted(request: UrlRequest, info: UrlResponseInfo) {
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request.read(ByteBuffer.allocateDirect(32 * 1024))
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}
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override fun onReadCompleted(
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request: UrlRequest,
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info: UrlResponseInfo,
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byteBuffer: ByteBuffer
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) {
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byteBuffer.flip()
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val bytes = ByteArray(byteBuffer.remaining())
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byteBuffer.get(bytes)
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byteArrayOutputStream.add(bytes)
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byteBuffer.clear()
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request.read(byteBuffer)
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}
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override fun onSucceeded(request: UrlRequest, info: UrlResponseInfo) {
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val totalSize = byteArrayOutputStream.sumOf { it.size }
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val imageBytes = ByteArray(totalSize)
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var offset = 0
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for (chunk in byteArrayOutputStream) {
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System.arraycopy(chunk, 0, imageBytes, offset, chunk.size)
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offset += chunk.size
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}
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val bitmap = BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.size)
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if (bitmap != null) {
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onSuccess(bitmap.asImageBitmap())
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} else {
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onError("Failed to decode image")
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}
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}
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override fun onFailed(request: UrlRequest, info: UrlResponseInfo?, error: CronetException) {
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onError(error.message ?: "Unknown error")
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}
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}
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val requestBuilder = cronetEngine.newUrlRequestBuilder(url, callback, executor)
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requestBuilder.build().start()
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}

‎sample/cronet/app/src/main/java/com/datadog/cronet/sample/SampleApplication.kt‎

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package com.datadog.cronet.sample
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import android.app.Application
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import com.datadog.android.Datadog
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import com.datadog.android.core.configuration.BatchSize
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import com.datadog.android.core.configuration.Configuration
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import com.datadog.android.core.configuration.UploadFrequency
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import com.datadog.android.cronet.DatadogCronetEngine
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import com.datadog.android.privacy.TrackingConsent
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import com.datadog.android.rum.ExperimentalRumApi
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import com.datadog.android.rum.Rum
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import com.datadog.android.rum.RumConfiguration
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import org.chromium.net.CronetEngine
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class SampleApplication : Application() {
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internal lateinit var cronetEngine: CronetEngine
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@OptIn(ExperimentalRumApi::class)
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override fun onCreate() {
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super.onCreate()
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Datadog.initialize(
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context = this,
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trackingConsent = TrackingConsent.GRANTED,
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configuration = Configuration
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.Builder(
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clientToken = BuildConfig.DD_API_TOKEN,
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env = "env",
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)
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.setFirstPartyHosts(listOf("storage.googleapis.com"))
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.setBatchSize(BatchSize.SMALL)
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.setUploadFrequency(UploadFrequency.FREQUENT)
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.build()
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)
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val rumConfig = RumConfiguration.Builder(BuildConfig.DD_APP_ID)
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.collectAccessibility(true)
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.trackBackgroundEvents(true)
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.build()
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Rum.enable(rumConfig)
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cronetEngine = DatadogCronetEngine.Builder(this).build()
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}
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}

‎sample/cronet/app/src/main/res/values/strings.xml‎

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<resources>
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<string name="app_name">CronetSampleApplication</string>
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</resources>

‎sample/cronet/build.gradle.kts‎

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// Top-level build file where you can add configuration options common to all sub-projects/modules.
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plugins {
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alias(libs.plugins.android.application) apply false
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alias(libs.plugins.kotlin.android) apply false
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alias(libs.plugins.kotlin.compose) apply false
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}
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buildscript {
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dependencies {
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classpath("com.datadoghq:dd-sdk-android-gradle-plugin:1.21.0")
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}
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}

‎sample/cronet/gradle.properties‎

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# Project-wide Gradle settings.
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# IDE (e.g. Android Studio) users:
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# Gradle settings configured through the IDE *will override*
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# any settings specified in this file.
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# For more details on how to configure your build environment visit
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# http://www.gradle.org/docs/current/userguide/build_environment.html
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# Specifies the JVM arguments used for the daemon process.
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# The setting is particularly useful for tweaking memory settings.
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org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
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# When configured, Gradle will run in incubating parallel mode.
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# This option should only be used with decoupled projects. For more details, visit
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# https://developer.android.com/r/tools/gradle-multi-project-decoupled-projects
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# org.gradle.parallel=true
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# AndroidX package structure to make it clearer which packages are bundled with the
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# Android operating system, and which are packaged with your app's APK
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# https://developer.android.com/topic/libraries/support-library/androidx-rn
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android.useAndroidX=true
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# Kotlin code style for this project: "official" or "obsolete":
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kotlin.code.style=official
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# Enables namespacing of each library's R class so that its R class includes only the
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# resources declared in the library itself and none from the library's dependencies,
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# thereby reducing the size of the R class for that library
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android.nonTransitiveRClass=true

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