mirror of https://github.com/grpc/grpc-java.git
72 lines
2.7 KiB
Markdown
72 lines
2.7 KiB
Markdown
gRPC Hello World Tutorial (Android Java)
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========================
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BACKGROUND
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-------------
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For this sample, we've already generated the server and client stubs from [helloworld.proto](https://github.com/grpc/grpc-common/blob/master/protos/helloworld.proto).
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PREREQUISITES
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-------------
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- [Java gRPC](https://github.com/grpc/grpc-java)
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- [Android Tutorial](https://developer.android.com/training/basics/firstapp/index.html) If you're new to Android development
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- We only have Android gRPC client in this example. Please follow examples in other languages to build and run a gRPC server.
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INSTALL
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-------
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1 Clone the gRPC Java git repo
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```sh
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$ git clone https://github.com/grpc/grpc-java
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```
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2 Install gRPC Java, as described in [How to Build](https://github.com/grpc/grpc-java#how-to-build)
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```sh
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$ # from this dir
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$ cd grpc-java
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$ # follow the instructions in 'How to Build'
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```
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3 [Create an Android project](https://developer.android.com/training/basics/firstapp/creating-project.html) under your working directory.
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- Set Application name to "Helloworld Example" and set Company Domain to "grpc.io". Make sure your package name is "io.grpc.helloworldexample"
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- Choose appropriate minimum SDK
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- Use Blank Activity
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- Set Activity Name to HelloworldActivity
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- Set Layout Name to activity_helloworld
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4 Prepare the app
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- Clone this git repo
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```sh
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$ git clone https://github.com/grpc/grpc-common
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```
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- Replace the generated HelloworldActivity.java and activity_helloworld.xml with the two files in this repo
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- Copy GreeterGrpc.java and Helloworld.java under your_app_dir/app/src/main/java/io/grpc/examples/
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- In your AndroidManifest.xml, make sure you have
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```sh
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<uses-permission android:name="android.permission.INTERNET" />
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```
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added outside your appplication tag
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5 Add dependencies. gRPC Java on Android depends on grpc-java, protobuf nano, okhttp
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- Copy grpc-java .jar files to your_app_dir/app/libs/:
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- grpc-java/core/build/libs/*.jar
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- grpc-java/stub/build/libs/*.jar
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- grpc-java/nano/build/libs/*.jar
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- grpc-java/okhttp/build/libs/*.jar
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- Copy or download other dependencies to your_app_dir/app/libs/:
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- [Guava 18](http://search.maven.org/remotecontent?filepath=com/google/guava/guava/18.0/guava-18.0.jar)
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- [okhttp 2.2.0](http://repo1.maven.org/maven2/com/squareup/okhttp/okhttp/2.2.0/okhttp-2.2.0.jar)
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- protobuf nano:
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```sh
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$ cp ~/.m2/repository/com/google/protobuf/nano/protobuf-javanano/2.6.2-pre/protobuf-javanano-2.6.2-pre.jar your_app_dir/app/libs/
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```
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- Make sure your_app_dir/app/build.gradle contains:
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```sh
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dependencies {
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compile fileTree(dir: 'libs', include: ['*.jar'])
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}
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```
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6 [Run your example app](https://developer.android.com/training/basics/firstapp/running-app.html)
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