Add manifest file Internet permission

base/src/main/AndroidManifest.xml

@@ -17,6 +17,7 @@
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.google.codelabs.cronet">
+    <uses-permission android:name="android.permission.INTERNET" />
 
     <application
         android:allowBackup="true"

solution/src/main/AndroidManifest.xml

@@ -17,6 +17,7 @@
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.google.codelabs.cronet">
+    <uses-permission android:name="android.permission.INTERNET" />
 
     <application
         android:allowBackup="true"

solution/src/main/java/com/google/codelabs/cronet/CronetImageDownloader.kt

@@ -43,6 +43,8 @@ internal class CronetImageDownloader (
                 request: UrlRequest,
                 info: UrlResponseInfo,
                 bodyBytes: ByteArray) {
+                engine.stopNetLog()
+
                 cont.resume(ImageDownloaderResult(
                     successful = true,
                     blob = bodyBytes,

solution/src/main/java/com/google/codelabs/cronet/ImagesViewModel.kt

@@ -25,7 +25,9 @@ class ImagesViewModel : ViewModel() {
     val images = mutableStateListOf<DownloadedImage>()
 
     fun addImage(): Int {
-        images.add(DownloadedImage(URLS[Random.nextInt(URLS.size)]))
+//        images.add(DownloadedImage(URLS[Random.nextInt(URLS.size)]))
+        images.add(DownloadedImage(URLS[5]))
+
         return images.size - 1
     }
 

solution/src/main/java/com/google/codelabs/cronet/MainActivity.kt

@@ -41,6 +41,7 @@ import com.google.android.gms.net.CronetProviderInstaller
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import org.chromium.net.CronetEngine
+import java.io.File
 import java.util.concurrent.atomic.AtomicReference
 import java.util.function.Supplier
 
@@ -67,9 +68,15 @@ class MainActivity : ComponentActivity() {
         CronetProviderInstaller.installProvider(ctx).addOnCompleteListener {
             if (it.isSuccessful) {
                 Log.i(LOGGER_TAG, "Successfully installed Play Services provider: $it")
+                val logFile = File(ctx.cacheDir, "network_log.json")
+
                 val cronetEngine = CronetEngine.Builder(ctx)
+                    .setStoragePath(ctx.cacheDir.absolutePath)
                     .enableHttpCache(CronetEngine.Builder.HTTP_CACHE_IN_MEMORY, 10 * 1024 * 1024)
-                    .build()
+//                    .enableQuic(true)
+                    .build().apply {
+                        startNetLogToFile(logFile.absolutePath, /* include_http2 */ true)
+                    }
                 imageDownloader.set(CronetImageDownloader(cronetEngine))
             } else {
                 Log.w(LOGGER_TAG, "Unable to load Cronet from Play Services", it.exception)

solution/src/main/java/com/google/codelabs/cronet/ReadToMemoryCronetCallback.kt

@@ -30,12 +30,16 @@ internal abstract class ReadToMemoryCronetCallback : UrlRequest.Callback() {
     final override fun onRedirectReceived(
         request: UrlRequest, info: UrlResponseInfo?, newLocationUrl: String?
     ) {
+        Log.d("Cronet", "Response Redirect")
+
         request.followRedirect()
     }
 
     final override fun onResponseStarted(request: UrlRequest, info: UrlResponseInfo) {
         Log.i(TAG, "****** Response Started ******")
         Log.i(TAG, "*** Headers Are *** ${info.allHeaders}")
+        Log.d("Cronet", "Response started")
+        Log.d("Cronet", "URL: ${info}")
 
         // One must use a *direct* byte buffer when calling the read method.
         request.read(ByteBuffer.allocateDirect(BYTE_BUFFER_CAPACITY_BYTES))
@@ -44,6 +48,9 @@ internal abstract class ReadToMemoryCronetCallback : UrlRequest.Callback() {
     final override fun onReadCompleted(
         request: UrlRequest, info: UrlResponseInfo, byteBuffer: ByteBuffer
     ) {
+        Log.d("Cronet", "Read completed")
+        Log.d("Cronet", "Buffer remaining: ${byteBuffer.remaining()}")
+
         // The byte buffer we're getting in the callback hasn't been flipped for reading,
         // so flip it so we can read the content.
         byteBuffer.flip()
@@ -58,6 +65,8 @@ internal abstract class ReadToMemoryCronetCallback : UrlRequest.Callback() {
 
     final override fun onSucceeded(request: UrlRequest, info: UrlResponseInfo) {
         val bodyBytes = bytesReceived.toByteArray()
+        Log.d("Cronet", "Request succeeded")
+        Log.d("Cronet", "URL: ${info.url}")
 
         // We invoke the callback directly here for simplicity. Note that the executor running this
         // callback might be shared with other Cronet requests, or even with other parts of your