├── CONTRIBUTING.md ├── LICENSE ├── README.md └── android ├── .gitignore ├── app ├── .gitignore ├── build.gradle ├── proguard-rules.pro └── src │ ├── androidTest │ └── java │ │ └── com │ │ └── google │ │ └── samples │ │ └── cronet_sample │ │ ├── MainActivityTest.java │ │ └── WelcomeActivityTest.java │ └── main │ ├── AndroidManifest.xml │ ├── java │ └── com │ │ └── google │ │ └── samples │ │ └── cronet_sample │ │ ├── CronetApplication.java │ │ ├── MainActivity.java │ │ ├── ReadToMemoryCronetCallback.java │ │ ├── ViewAdapter.java │ │ ├── WelcomeActivity.java │ │ └── data │ │ └── ImageRepository.java │ └── res │ ├── layout │ ├── image_layout.xml │ ├── images_activity.xml │ └── welcome_layout.xml │ ├── mipmap-hdpi │ └── ic_launcher.png │ ├── mipmap-mdpi │ └── ic_launcher.png │ ├── mipmap-xhdpi │ └── ic_launcher.png │ ├── mipmap-xxhdpi │ └── ic_launcher.png │ ├── mipmap-xxxhdpi │ └── ic_launcher.png │ ├── values-w820dp │ └── dimens.xml │ └── values │ ├── colors.xml │ ├── dimens.xml │ ├── strings.xml │ └── styles.xml ├── build.gradle ├── gradle.properties ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat └── settings.gradle /CONTRIBUTING.md: -------------------------------------------------------------------------------- 1 | # How to become a contributor and submit your own code 2 | 3 | ## Contributor License Agreements 4 | 5 | We'd love to accept your sample apps and patches! Before we can take them, we 6 | have to jump a couple of legal hurdles. 7 | 8 | Please fill out either the individual or corporate Contributor License Agreement (CLA). 9 | 10 | * If you are an individual writing original source code and you're sure you 11 | own the intellectual property, then you'll need to sign an [individual CLA] 12 | (https://developers.google.com/open-source/cla/individual). 13 | * If you work for a company that wants to allow you to contribute your work, 14 | then you'll need to sign a [corporate CLA] 15 | (https://developers.google.com/open-source/cla/corporate). 16 | 17 | Follow either of the two links above to access the appropriate CLA and 18 | instructions for how to sign and return it. Once we receive it, we'll be able to 19 | accept your pull requests. 20 | 21 | ## Contributing A Patch 22 | 23 | 1. Submit an issue describing your proposed change to the repo in question. 24 | 1. The repo owner will respond to your issue promptly. 25 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright 2015 Google Inc. 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | Cronet Sample 2 | =================================== 3 | 4 | [Cronet](https://chromium.googlesource.com/chromium/src/+/master/components/cronet?autodive=0%2F%2F) 5 | is Chromium's Networking stack packaged as a library. This sample app shows how to use the library. 6 | 7 | ### Getting Started 8 | --------------- 9 | 1. Clone or download this repository. 10 | 2. Import the project in Android Studio (File → New → 11 | Import Project) by selecting the top level build.gradle file inside the 12 | "android" directory. 13 | 3. Connect a physical Android device or start an emulator. 14 | 4. Run the app from Android Studio by pressing the "run" (green triangle) 15 | button. Alternatively, 16 | run "gradlew :app:installDebug" from the command line inside the "android" 17 | directory. 18 | 19 | 20 | ### License 21 | --------------- 22 | 23 | ``` 24 | Copyright 2018 Google, Inc. 25 | 26 | Licensed to the Apache Software Foundation (ASF) under one or more contributor 27 | license agreements. See the NOTICE file distributed with this work for 28 | additional information regarding copyright ownership. The ASF licenses this 29 | file to you under the Apache License, Version 2.0 (the "License"); you may not 30 | use this file except in compliance with the License. You may obtain a copy of 31 | the License at 32 | 33 | http://www.apache.org/licenses/LICENSE-2.0 34 | 35 | Unless required by applicable law or agreed to in writing, software 36 | distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 37 | WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 38 | License for the specific language governing permissions and limitations under 39 | the License. 40 | ``` 41 | -------------------------------------------------------------------------------- /android/.gitignore: -------------------------------------------------------------------------------- 1 | *.iml 2 | .gradle 3 | /local.properties 4 | .idea 5 | .idea_modules 6 | .DS_Store 7 | /build 8 | /captures 9 | app/app-release.apk 10 | -------------------------------------------------------------------------------- /android/app/.gitignore: -------------------------------------------------------------------------------- 1 | /build 2 | -------------------------------------------------------------------------------- /android/app/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | 3 | android { 4 | compileSdkVersion 30 5 | buildToolsVersion "30.0.2" 6 | 7 | // Cronet jars contain Java 8 bytecode. 8 | compileOptions { 9 | sourceCompatibility 1.8 10 | targetCompatibility 1.8 11 | } 12 | 13 | defaultConfig { 14 | applicationId "com.google.samples.cronet_sample" 15 | // Cronet itself supports devices down to JellyBean, but the test app makes use of 16 | // language constructs such as streams that aren't supported in lower versions. 17 | minSdkVersion 24 18 | targetSdkVersion 30 19 | versionCode 1 20 | versionName "1.0" 21 | testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner' 22 | } 23 | buildTypes { 24 | release { 25 | minifyEnabled false 26 | proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 27 | } 28 | } 29 | } 30 | 31 | ext { 32 | supportLibVersion = "27.1.1" 33 | androidTestVersion = "1.0.2" 34 | } 35 | 36 | dependencies { 37 | implementation "com.google.android.gms:play-services-cronet:17.0.1" 38 | implementation 'androidx.appcompat:appcompat:1.3.0' 39 | implementation 'androidx.recyclerview:recyclerview:1.2.1' 40 | implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0' 41 | testImplementation "junit:junit:4.13.2" 42 | androidTestImplementation 'androidx.test.ext:junit:1.1.3' 43 | androidTestImplementation 'androidx.test:rules:1.4.0' 44 | androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0' 45 | 46 | } 47 | -------------------------------------------------------------------------------- /android/app/proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # By default, the flags in this file are appended to flags specified 3 | # in /Users/cchiappini/Library/Android/sdk/tools/proguard/proguard-android.txt 4 | # You can edit the include path and order by changing the proguardFiles 5 | # directive in build.gradle. 6 | # 7 | # For more details, see 8 | # http://developer.android.com/guide/developing/tools/proguard.html 9 | 10 | # Add any project specific keep options here: 11 | 12 | # If your project uses WebView with JS, uncomment the following 13 | # and specify the fully qualified class name to the JavaScript interface 14 | # class: 15 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 16 | # public *; 17 | #} 18 | -------------------------------------------------------------------------------- /android/app/src/androidTest/java/com/google/samples/cronet_sample/MainActivityTest.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2016 The Android Open Source Project 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.google.samples.cronet_sample; 18 | 19 | import static androidx.test.espresso.Espresso.onView; 20 | import static androidx.test.espresso.assertion.ViewAssertions.matches; 21 | import static androidx.test.espresso.matcher.ViewMatchers.isDisplayed; 22 | import static androidx.test.espresso.matcher.ViewMatchers.withId; 23 | 24 | import androidx.test.ext.junit.rules.ActivityScenarioRule; 25 | import androidx.test.ext.junit.runners.AndroidJUnit4; 26 | import org.junit.Rule; 27 | import org.junit.Test; 28 | import org.junit.runner.RunWith; 29 | 30 | @RunWith(AndroidJUnit4.class) 31 | public class MainActivityTest { 32 | 33 | @Rule 34 | public ActivityScenarioRule menuActivityTestRule = 35 | new ActivityScenarioRule<>(MainActivity.class); 36 | 37 | @Test 38 | public void imagesView_isDisplayed() { 39 | onView(withId(R.id.images_activity_layout)).check(matches(isDisplayed())); 40 | } 41 | } -------------------------------------------------------------------------------- /android/app/src/androidTest/java/com/google/samples/cronet_sample/WelcomeActivityTest.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2016 The Android Open Source Project 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.google.samples.cronet_sample; 18 | 19 | import static androidx.test.espresso.Espresso.onView; 20 | import static androidx.test.espresso.assertion.ViewAssertions.matches; 21 | import static androidx.test.espresso.matcher.ViewMatchers.isDisplayed; 22 | import static androidx.test.espresso.matcher.ViewMatchers.withId; 23 | 24 | import androidx.test.ext.junit.rules.ActivityScenarioRule; 25 | import androidx.test.ext.junit.runners.AndroidJUnit4; 26 | import org.junit.Rule; 27 | import org.junit.Test; 28 | import org.junit.runner.RunWith; 29 | 30 | @RunWith(AndroidJUnit4.class) 31 | public class WelcomeActivityTest { 32 | 33 | @Rule 34 | public ActivityScenarioRule menuActivityTestRule = 35 | new ActivityScenarioRule<>(WelcomeActivity.class); 36 | 37 | @Test 38 | public void welcomeMessage_isDisplayed() throws InterruptedException { 39 | onView(withId(R.id.welcome_introduction)).check(matches(isDisplayed())); 40 | } 41 | } -------------------------------------------------------------------------------- /android/app/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 6 | 7 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | -------------------------------------------------------------------------------- /android/app/src/main/java/com/google/samples/cronet_sample/CronetApplication.java: -------------------------------------------------------------------------------- 1 | package com.google.samples.cronet_sample; 2 | 3 | import android.app.Application; 4 | import android.content.Context; 5 | import android.widget.Toast; 6 | 7 | import com.google.android.gms.common.GooglePlayServicesNotAvailableException; 8 | import com.google.android.gms.common.GooglePlayServicesRepairableException; 9 | import com.google.android.gms.net.CronetProviderInstaller; 10 | import com.google.android.gms.tasks.Task; 11 | 12 | import org.chromium.net.CronetEngine; 13 | import org.chromium.net.CronetProvider; 14 | 15 | import java.util.Collections; 16 | import java.util.List; 17 | import java.util.concurrent.ExecutorService; 18 | import java.util.concurrent.Executors; 19 | import java.util.concurrent.atomic.AtomicInteger; 20 | import java.util.stream.Collectors; 21 | 22 | public class CronetApplication extends Application { 23 | 24 | // We recommend that each application uses a single, global CronetEngine. This allows Cronet 25 | // to maximize performance. This can either be achieved using a global static . In this example, 26 | // we initialize it in an Application class to manage lifecycle of the network log. 27 | private CronetEngine cronetEngine; 28 | 29 | // Executor that will invoke asynchronous Cronet callbacks. Like with the Cronet engine, we 30 | // recommend that it's managed centrally. 31 | private ExecutorService cronetCallbackExecutorService; 32 | 33 | // We use this variable to demonstrate how Cronet's caching behaves. Each subsequent attempt to 34 | // load the images fetches one more, up to the number of images specified in ImageRepository. 35 | // Don't do this in your production application, it's a dirty hack :). 36 | public final AtomicInteger imagesToLoadCeiling = new AtomicInteger(); 37 | 38 | @Override 39 | public void onCreate() { 40 | super.onCreate(); 41 | cronetEngine = createDefaultCronetEngine(this); 42 | cronetCallbackExecutorService = Executors.newFixedThreadPool(4); 43 | } 44 | 45 | public CronetEngine getCronetEngine() { 46 | return cronetEngine; 47 | } 48 | 49 | public ExecutorService getCronetCallbackExecutorService() { 50 | return cronetCallbackExecutorService; 51 | } 52 | 53 | private static CronetEngine createDefaultCronetEngine(Context context) { 54 | // Cronet makes use of modern protocols like HTTP/2 and QUIC by default. However, to make 55 | // the most of servers that support QUIC, one must either specify that a particular domain 56 | // supports QUIC explicitly using QUIC hints, or enable the on-disk cache. 57 | // 58 | // When a QUIC hint is provided, Cronet will attempt to use QUIC from the very beginning 59 | // when communicating with the server and if that fails, we fall back to using HTTP. If 60 | // no hints are provided, Cronet uses HTTP for the first request issued to the server. 61 | // If the server indicates it does support QUIC, Cronet stores the information and will use 62 | // QUIC for subsequent request to that domain. 63 | // 64 | // We recommend that QUIC hints are provided explicitly when working with servers known 65 | // to support QUIC. 66 | return new CronetEngine.Builder(context) 67 | // The storage path must be set first when using a disk cache. 68 | .setStoragePath(context.getFilesDir().getAbsolutePath()) 69 | 70 | // Enable on-disk cache, this enables automatic QUIC usage for subsequent requests 71 | // to the same domain across application restarts. If you also want to cache HTTP 72 | // responses, use HTTP_CACHE_DISK instead. Typically you will want to enable caching 73 | // in full, we turn it off for this demo to better demonstrate Cronet's behavior 74 | // using net protocols. 75 | .enableHttpCache(CronetEngine.Builder.HTTP_CACHE_DISK_NO_HTTP, 100 * 1024) 76 | 77 | // HTTP2 and QUIC support is enabled by default. When both are enabled (and no hints 78 | // are provided), Cronet tries to use both protocols and it's nondeterministic which 79 | // one will be used for the first few requests. As soon as Cronet is aware that 80 | // a server supports QUIC, it will always attempt to use it first. Try disabling 81 | // and enabling HTTP2 support and see how the negotiated protocol changes! Also try 82 | // forcing a new connection by enabling and disabling flight mode after the first 83 | // request to ensure QUIC usage. 84 | .enableHttp2(true) 85 | .enableQuic(true) 86 | 87 | // Brotli support is NOT enabled by default. 88 | .enableBrotli(true) 89 | 90 | // One can provide a custom user agent if desired. 91 | .setUserAgent("CronetSampleApp") 92 | 93 | // As noted above, QUIC hints speed up initial requests to a domain. Multiple hints 94 | // can be added. We don't enable them in this demo to demonstrate how QUIC 95 | // is being used if no hints are provided. 96 | 97 | // .addQuicHint("storage.googleapis.com", 443, 443) 98 | // .addQuicHint("www.googleapis.com", 443, 443) 99 | .build(); 100 | } 101 | 102 | private static void createCustomCronetEngine(Context context) { 103 | // For most users of Cronet on modern devices it should be sufficient to just create 104 | // a CronetEngine.Builder directly, as demonstrated in createDefaultCronetEngine(). 105 | // The implementation selects the "best" (the most recent) implementation of Cronet 106 | // available on the device. However, if the application requires more control over which 107 | // Cronet engine is selected, we allow that too. 108 | 109 | // To guarantee that a Google Play Services Cronet implementation is available, 110 | // one can explicitly install the Play Services Cronet provider. The returned task can 111 | // then be used to either proceed with creating a CronetEngine, launching an intent to 112 | // upgrade Google Play Services, or handling Play Services absence gracefully. 113 | Task installTask = CronetProviderInstaller.installProvider(context); 114 | installTask.addOnCompleteListener( 115 | task -> { 116 | if (task.isSuccessful()) { 117 | // create a Cronet engine 118 | return; 119 | } 120 | if (task.getException() != null) { 121 | Exception cause = task.getException(); 122 | if (cause instanceof GooglePlayServicesNotAvailableException) { 123 | Toast.makeText(context, "Google Play services not available.", 124 | Toast.LENGTH_SHORT).show(); 125 | } else if (cause instanceof GooglePlayServicesRepairableException) { 126 | Toast.makeText(context, "Google Play services update is required.", 127 | Toast.LENGTH_SHORT).show(); 128 | context.startActivity(((GooglePlayServicesRepairableException) cause) 129 | .getIntent()); 130 | } else { 131 | Toast.makeText(context, "Unexpected error: " + cause, 132 | Toast.LENGTH_SHORT).show(); 133 | } 134 | } else { 135 | Toast.makeText(context, "Unable to load Google Play services.", 136 | Toast.LENGTH_SHORT).show(); 137 | } 138 | }); 139 | 140 | // If the user wants to pick a Cronet implementation (from those available on the device) 141 | // manually, they can retrieve the list of all providers on the device and use them to 142 | // create a CronetEngine directly. Make sure to check if the providers are enabled, 143 | // otherwise you might run into compatibility issues further down. 144 | List enabledProviders = 145 | CronetProvider.getAllProviders(context) 146 | .stream() 147 | .filter(CronetProvider::isEnabled) 148 | .collect(Collectors.toList()); 149 | 150 | if (enabledProviders.isEmpty()) { 151 | Toast.makeText(context, "No enabled Cronet providers!", Toast.LENGTH_SHORT).show(); 152 | return; 153 | } 154 | 155 | // Typically, the application would decide based on the name and version. We just pick 156 | // a random one. 157 | Collections.shuffle(enabledProviders); 158 | CronetProvider winner = enabledProviders.get(0); 159 | Toast.makeText(context, "And the winning Cronet implementation is " + winner.getName() + 160 | ", version " + winner.getVersion(), 161 | Toast.LENGTH_SHORT).show(); 162 | 163 | // Then, one can use the provider to create a builder, and set it up as demonstrated 164 | // in createDefaultCronetEngine. 165 | winner.createBuilder().enableBrotli(true).build(); 166 | } 167 | } 168 | -------------------------------------------------------------------------------- /android/app/src/main/java/com/google/samples/cronet_sample/MainActivity.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2016 The Android Open Source Project 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | package com.google.samples.cronet_sample; 17 | 18 | import android.os.Bundle; 19 | import android.widget.TextView; 20 | 21 | import androidx.appcompat.app.AppCompatActivity; 22 | import androidx.appcompat.widget.Toolbar; 23 | import androidx.recyclerview.widget.DefaultItemAnimator; 24 | import androidx.recyclerview.widget.GridLayoutManager; 25 | import androidx.recyclerview.widget.RecyclerView; 26 | import androidx.swiperefreshlayout.widget.SwipeRefreshLayout; 27 | 28 | import com.google.samples.cronet_sample.data.ImageRepository; 29 | 30 | import java.io.File; 31 | import java.io.IOException; 32 | import java.util.concurrent.atomic.AtomicReference; 33 | 34 | import org.chromium.net.CronetEngine; 35 | 36 | public class MainActivity extends AppCompatActivity { 37 | 38 | private static final String TAG = "MainActivity"; 39 | private SwipeRefreshLayout swipeRefreshLayout; 40 | private final AtomicReference metrics = new AtomicReference<>(); 41 | 42 | @Override 43 | protected void onCreate(Bundle savedInstanceState) { 44 | super.onCreate(savedInstanceState); 45 | 46 | // When debugging, the net log (https://www.chromium 47 | // .org/developers/design-documents/network-stack/netlog) 48 | // is an extremely useful tool to figure out what's going on in the network stack. However, 49 | // because it's a JSON file, it's quite sensitive to correct formatting,so we must ensure 50 | // that it's always closed properly. 51 | startNetLog(); 52 | Thread.setDefaultUncaughtExceptionHandler((thread, throwable) -> { 53 | stopNetLog(); 54 | }); 55 | 56 | setContentView(R.layout.images_activity); 57 | setUpToolbar(); 58 | swipeRefreshLayout = findViewById(R.id.images_activity_layout); 59 | swipeRefreshLayout.setOnRefreshListener(this::loadItems); 60 | loadItems(); 61 | } 62 | 63 | @Override 64 | protected void onDestroy() { 65 | super.onDestroy(); 66 | stopNetLog(); 67 | } 68 | 69 | private void loadItems() { 70 | metrics.set(new CronetMetrics(0, 0)); 71 | getCronetApplication().imagesToLoadCeiling.incrementAndGet(); 72 | 73 | RecyclerView cronetView = findViewById(R.id.images_view); 74 | 75 | GridLayoutManager gridLayoutManager = 76 | new GridLayoutManager(this, 2); 77 | 78 | cronetView.setLayoutManager(gridLayoutManager); 79 | cronetView.setAdapter(new ViewAdapter(this)); 80 | cronetView.setItemAnimator(new DefaultItemAnimator()); 81 | onItemsLoadComplete(); 82 | 83 | } 84 | 85 | private void onItemsLoadComplete() { 86 | swipeRefreshLayout.setRefreshing(false); 87 | } 88 | 89 | private void setUpToolbar() { 90 | Toolbar toolbar = findViewById(R.id.toolbar); 91 | setSupportActionBar(toolbar); 92 | getSupportActionBar().setDisplayShowTitleEnabled(false); 93 | ((TextView) toolbar.findViewById(R.id.title)).setText(R.string.toolbar_title); 94 | } 95 | 96 | /** 97 | * This calculates and sets on the UI the latency of loading images with Cronet. 98 | * 99 | *

This method must be thread safe as it can be called from multiple Cronet callbacks 100 | * in parallel. 101 | */ 102 | public void onCronetImageLoadSuccessful(long requestLatencyNanos) { 103 | CronetMetrics delta = new CronetMetrics(requestLatencyNanos, 1); 104 | CronetMetrics newMetrics = metrics.accumulateAndGet( 105 | delta, 106 | (left, right) -> new CronetMetrics( 107 | left.totalLatencyNanos + right.totalLatencyNanos, 108 | left.numberOfLoadedImages + right.numberOfLoadedImages)); 109 | 110 | 111 | if (newMetrics.numberOfLoadedImages == Math.min( 112 | getCronetApplication().imagesToLoadCeiling.get(), 113 | ImageRepository.numberOfImages())) { 114 | long averageLatencyNanos = 115 | newMetrics.totalLatencyNanos / newMetrics.numberOfLoadedImages; 116 | android.util.Log.i(TAG, 117 | "All Cronet Requests Complete, the average latency is " + averageLatencyNanos 118 | + " nanos."); 119 | final TextView cronetTime = findViewById(R.id.cronet_time_label); 120 | runOnUiThread(() -> cronetTime.setText(String.format(getResources() 121 | .getString(R.string.images_loaded), averageLatencyNanos))); 122 | } 123 | } 124 | 125 | CronetApplication getCronetApplication() { 126 | return ((CronetApplication) getApplication()); 127 | } 128 | 129 | private CronetEngine getCronetEngine() { 130 | return getCronetApplication().getCronetEngine(); 131 | } 132 | 133 | /** 134 | * Method to start NetLog to log Cronet events. 135 | * Find more info about Netlog here: 136 | * https://www.chromium.org/developers/design-documents/network-stack/netlog 137 | */ 138 | private void startNetLog() { 139 | File outputFile; 140 | try { 141 | outputFile = File.createTempFile("cronet", "log", 142 | this.getExternalFilesDir(null)); 143 | getCronetEngine().startNetLogToFile(outputFile.toString(), false); 144 | } catch (IOException e) { 145 | android.util.Log.e(TAG, e.toString()); 146 | } 147 | } 148 | 149 | /** 150 | * Method to properly stop NetLog 151 | */ 152 | private void stopNetLog() { 153 | getCronetEngine().stopNetLog(); 154 | } 155 | 156 | /** 157 | * Holder of multiple metrics that can be atomically updated. 158 | */ 159 | private static class CronetMetrics { 160 | final long totalLatencyNanos; 161 | final int numberOfLoadedImages; 162 | 163 | CronetMetrics(long totalLatencyNanos, int numberOfLoadedImages) { 164 | this.totalLatencyNanos = totalLatencyNanos; 165 | this.numberOfLoadedImages = numberOfLoadedImages; 166 | } 167 | } 168 | } 169 | -------------------------------------------------------------------------------- /android/app/src/main/java/com/google/samples/cronet_sample/ReadToMemoryCronetCallback.java: -------------------------------------------------------------------------------- 1 | package com.google.samples.cronet_sample; 2 | 3 | import org.chromium.net.CronetException; 4 | import org.chromium.net.UrlRequest; 5 | import org.chromium.net.UrlResponseInfo; 6 | 7 | import java.io.ByteArrayOutputStream; 8 | import java.io.IOException; 9 | import java.nio.ByteBuffer; 10 | import java.nio.channels.Channels; 11 | import java.nio.channels.WritableByteChannel; 12 | 13 | abstract class ReadToMemoryCronetCallback extends UrlRequest.Callback { 14 | 15 | private static final String TAG = "ReadToMemoryCronetCallback"; 16 | 17 | private static final int BYTE_BUFFER_CAPACITY_BYTES = 64 * 1024; 18 | 19 | private final ByteArrayOutputStream bytesReceived = new ByteArrayOutputStream(); 20 | private final WritableByteChannel receiveChannel = Channels.newChannel(bytesReceived); 21 | private final long startTimeNanos; 22 | 23 | ReadToMemoryCronetCallback() { 24 | // This is not entirely accurate as the request doesn't start the moment the callback 25 | // is created, but the events are close enough for the purpose of the test application. 26 | startTimeNanos = System.nanoTime(); 27 | } 28 | 29 | @Override 30 | public void onRedirectReceived( 31 | UrlRequest request, UrlResponseInfo info, String newLocationUrl) { 32 | // Invoked whenever a redirect is encountered. This will only be invoked between the call 33 | // to UrlRequest.start() and onResponseStarted(). The body of the redirect response, if it 34 | // has one, will be ignored. The redirect will not be followed until the URLRequest's 35 | // followRedirect method is called, either synchronously or asynchronously. 36 | 37 | android.util.Log.i(TAG, "****** onRedirectReceived ******"); 38 | request.followRedirect(); 39 | } 40 | 41 | @Override 42 | public void onResponseStarted(UrlRequest request, UrlResponseInfo info) { 43 | // Invoked when the final set of headers, after all redirects, is received. Will only be 44 | // invoked once for each request. 45 | // 46 | // With the exception of onCanceled(), no other {@link Callback} method will be invoked 47 | // for the request, including onSucceeded() and onFailed(), until read() is called 48 | // to attempt to start reading the response body. 49 | 50 | android.util.Log.i(TAG, "****** Response Started ******"); 51 | android.util.Log.i(TAG, "*** Headers Are *** " + info.getAllHeaders()); 52 | 53 | // One must use a *direct* byte buffer when calling the read method. 54 | request.read(ByteBuffer.allocateDirect(BYTE_BUFFER_CAPACITY_BYTES)); 55 | } 56 | 57 | @Override 58 | public void onReadCompleted( 59 | UrlRequest request, UrlResponseInfo info, ByteBuffer byteBuffer) { 60 | // Invoked whenever part of the response body has been read. Only part of the buffer may be 61 | // populated, even if the entire response body has not yet been consumed. 62 | // 63 | // With the exception of onCanceled(), no other {@link Callback} method will be invoked 64 | // for the request, including onSucceeded() and onFailed(), until read() is called 65 | // to attempt to continue reading the response body. 66 | 67 | android.util.Log.i(TAG, "****** onReadCompleted ******" + byteBuffer); 68 | 69 | // The byte buffer we're getting in the callback hasn't been flipped for reading, 70 | // so flip it so we can read the content. 71 | byteBuffer.flip(); 72 | 73 | try { 74 | receiveChannel.write(byteBuffer); 75 | } catch (IOException e) { 76 | android.util.Log.i(TAG, "IOException during ByteBuffer read. Details: ", e); 77 | } 78 | // Reset the buffer to prepare it for the next read 79 | byteBuffer.clear(); 80 | 81 | // Continue reading the request 82 | request.read(byteBuffer); 83 | } 84 | 85 | @Override 86 | public void onSucceeded(UrlRequest request, UrlResponseInfo info) { 87 | // Invoked when request is completed successfully. Once invoked, no other Callback methods 88 | // will be invoked. 89 | 90 | long latencyNanos = System.nanoTime() - startTimeNanos; 91 | 92 | android.util.Log.i(TAG, 93 | "****** Cronet Request Completed, the latency is " + latencyNanos + " nanoseconds" + 94 | ". " + getWasCachedMessage(info)); 95 | 96 | android.util.Log.i(TAG, 97 | "****** Cronet Negotiated protocol: " + info.getNegotiatedProtocol()); 98 | 99 | android.util.Log.i(TAG, 100 | "****** Cronet Request Completed, status code is " + info.getHttpStatusCode() 101 | + ", total received bytes is " + info.getReceivedByteCount()); 102 | 103 | byte[] bodyBytes = bytesReceived.toByteArray(); 104 | 105 | // We invoke the callback directly here for simplicity. Note that the executor running this 106 | // callback might be shared with other Cronet requests, or even with other parts of your 107 | // application. Always make sure to appropriately provision your pools, and consider 108 | // delegating time consuming work on another executor. 109 | onSucceeded(request, info, bodyBytes, latencyNanos); 110 | } 111 | 112 | private static String getWasCachedMessage(UrlResponseInfo responseInfo) { 113 | if (responseInfo.wasCached()) { 114 | return "The request was cached."; 115 | } else { 116 | return ""; 117 | } 118 | } 119 | 120 | abstract void onSucceeded( 121 | UrlRequest request, UrlResponseInfo info, byte[] bodyBytes, long latencyNanos); 122 | 123 | @Override 124 | public void onFailed(UrlRequest var1, UrlResponseInfo var2, CronetException var3) { 125 | android.util.Log.i(TAG, "****** onFailed, error is: " + var3.getMessage()); 126 | } 127 | } 128 | -------------------------------------------------------------------------------- /android/app/src/main/java/com/google/samples/cronet_sample/ViewAdapter.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2016 The Android Open Source Project 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | package com.google.samples.cronet_sample; 17 | 18 | import android.graphics.Bitmap; 19 | import android.graphics.BitmapFactory; 20 | import android.view.LayoutInflater; 21 | import android.view.View; 22 | import android.view.ViewGroup; 23 | import android.widget.ImageView; 24 | 25 | import androidx.recyclerview.widget.RecyclerView; 26 | 27 | import com.google.samples.cronet_sample.data.ImageRepository; 28 | 29 | import org.chromium.net.UrlRequest; 30 | import org.chromium.net.UrlResponseInfo; 31 | 32 | public class ViewAdapter extends RecyclerView.Adapter { 33 | 34 | private final MainActivity mainActivity; 35 | 36 | public ViewAdapter(MainActivity mainActivity) { 37 | this.mainActivity = mainActivity; 38 | } 39 | 40 | @Override 41 | public ViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 42 | View v = LayoutInflater.from(parent.getContext()) 43 | .inflate(R.layout.image_layout, null); 44 | return new ViewHolder(v); 45 | } 46 | 47 | public static class ViewHolder extends RecyclerView.ViewHolder { 48 | private final ImageView mImageViewCronet; 49 | 50 | public ViewHolder(View v) { 51 | super(v); 52 | mImageViewCronet = itemView.findViewById(R.id.cronet_image); 53 | } 54 | 55 | public ImageView getmImageViewCronet() { 56 | return mImageViewCronet; 57 | } 58 | } 59 | 60 | @Override 61 | public void onBindViewHolder(final ViewHolder holder, int position) { 62 | CronetApplication cronetApplication = mainActivity.getCronetApplication(); 63 | 64 | // UrlRequest and UrlRequest.Callback are the core of Cronet operations. UrlRequest is used 65 | // to issue requests, UrlRequest.Callback specifies how the application reacts to the server 66 | // responses. 67 | 68 | // Set up a callback which, on a successful read of the entire response, interprets 69 | // the response body as an image. By default, Cronet reads the body in small parts, having 70 | // the full body as a byte array is application specific logic. For more details about 71 | // the callbacks please see implementation of ReadToMemoryCronetCallback. 72 | ReadToMemoryCronetCallback callback = new ReadToMemoryCronetCallback() { 73 | @Override 74 | void onSucceeded(UrlRequest request, UrlResponseInfo info, byte[] bodyBytes, 75 | long latencyNanos) { 76 | // Contribute the request latency 77 | mainActivity.onCronetImageLoadSuccessful(latencyNanos); 78 | 79 | // Send image to layout 80 | final Bitmap bimage = BitmapFactory.decodeByteArray(bodyBytes, 0, bodyBytes.length); 81 | mainActivity.runOnUiThread(() -> { 82 | holder.getmImageViewCronet().setImageBitmap(bimage); 83 | holder.getmImageViewCronet().getLayoutParams().height = bimage.getHeight(); 84 | holder.getmImageViewCronet().getLayoutParams().width = bimage.getWidth(); 85 | }); 86 | } 87 | }; 88 | 89 | // The URL request builder allows you to customize the request. 90 | UrlRequest.Builder builder = cronetApplication.getCronetEngine() 91 | .newUrlRequestBuilder( 92 | ImageRepository.getImage(position), 93 | callback, 94 | cronetApplication.getCronetCallbackExecutorService()) 95 | // You can set arbitrary headers as needed 96 | .addHeader("x-my-custom-header", "Hello-from-Cronet") 97 | // Cronet supports QoS if you specify request priorities 98 | .setPriority(UrlRequest.Builder.REQUEST_PRIORITY_IDLE); 99 | // ... and more! Check the UrlRequest.Builder docs. 100 | 101 | // Start the request 102 | builder.build().start(); 103 | } 104 | 105 | @Override 106 | public int getItemCount() { 107 | return Math.min( 108 | mainActivity.getCronetApplication().imagesToLoadCeiling.get(), 109 | ImageRepository.numberOfImages()); 110 | } 111 | } 112 | -------------------------------------------------------------------------------- /android/app/src/main/java/com/google/samples/cronet_sample/WelcomeActivity.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2016 The Android Open Source Project 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | package com.google.samples.cronet_sample; 17 | 18 | import android.content.Intent; 19 | import android.os.Bundle; 20 | import android.view.View; 21 | import android.widget.TextView; 22 | import androidx.appcompat.app.AppCompatActivity; 23 | import androidx.appcompat.widget.Toolbar; 24 | 25 | public class WelcomeActivity extends AppCompatActivity{ 26 | 27 | protected void onCreate(Bundle icicle) { 28 | super.onCreate(icicle); 29 | 30 | setContentView(R.layout.welcome_layout); 31 | setUpToolbar(); 32 | 33 | ((TextView) findViewById(R.id.welcome_introduction)) 34 | .setText(R.string.welcome_introduction_text); 35 | ((TextView) findViewById(R.id.cronet_load_images)) 36 | .setText(R.string.cronet_load_images_text); 37 | } 38 | 39 | public void openImages(View view) { 40 | Intent mpdIntent = new Intent(this, MainActivity.class); 41 | startActivity(mpdIntent); 42 | } 43 | 44 | private void setUpToolbar() { 45 | Toolbar toolbar = findViewById(R.id.welcome_toolbar); 46 | setSupportActionBar(toolbar); 47 | getSupportActionBar().setDisplayShowTitleEnabled(false); 48 | ((TextView) toolbar.findViewById(R.id.welcome_title)).setText(R.string.welcome_activity); 49 | } 50 | } 51 | -------------------------------------------------------------------------------- /android/app/src/main/java/com/google/samples/cronet_sample/data/ImageRepository.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2016 The Android Open Source Project 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | package com.google.samples.cronet_sample.data; 17 | 18 | public class ImageRepository { 19 | 20 | private static String[] imageUrls= { 21 | "https://storage.googleapis.com/cronet/sun.jpg", 22 | "https://storage.googleapis.com/cronet/flower.jpg", 23 | "https://storage.googleapis.com/cronet/chair.jpg", 24 | "https://storage.googleapis.com/cronet/white.jpg", 25 | "https://storage.googleapis.com/cronet/moka.jpg", 26 | "https://storage.googleapis.com/cronet/walnut.jpg" 27 | }; 28 | 29 | public static int numberOfImages() { 30 | return imageUrls.length; 31 | } 32 | 33 | public static String getImage(int position) { 34 | return imageUrls[position]; 35 | } 36 | } 37 | -------------------------------------------------------------------------------- /android/app/src/main/res/layout/image_layout.xml: -------------------------------------------------------------------------------- 1 | 2 | 17 | 24 | 25 | 29 | -------------------------------------------------------------------------------- /android/app/src/main/res/layout/images_activity.xml: -------------------------------------------------------------------------------- 1 | 2 | 17 | 23 | 24 | 28 | 29 | 34 | 35 | 44 | 45 | 52 | 53 | 54 | 55 | 60 | 61 | 66 | 67 | 68 | 72 | 73 | 74 | 75 | 76 | -------------------------------------------------------------------------------- /android/app/src/main/res/layout/welcome_layout.xml: -------------------------------------------------------------------------------- 1 | 2 | 17 | 21 | 22 | 30 | 31 | 37 | 38 | 39 | 40 | 44 | 45 | 53 | 54 | 58 | 59 | 66 | 67 |