Add the Android interop test App.

So far, it is built separately from the other gRpc components.

.gitignore

@@ -2,6 +2,7 @@
 build
 gradle.properties
 .gradle
+local.properties
 
 # IntelliJ IDEA
 .idea

android-interop-testing/README.md

@@ -0,0 +1,46 @@
+gRPC Android test App
+=======================
+
+Implements gRPC integration tests in an Android App.
+
+TODO(madongfly) integrate this App into the gRPC-Java build system.
+
+In order to build this app, you need a local.properties file under this directory which specifies
+the location of your android sdk:
+```
+sdk.dir=/somepath/somepath/sdk
+```
+
+Connect your Android device or start the emulator:
+```
+$ ./start-emulator.sh <AVD name> & ./wait-for-emulator.sh
+```
+
+Manually test
+-------------
+
+Install the App by:
+```
+$ ../gradlew installDebug
+```
+Then manually test it with the UI.
+
+
+Commandline test
+----------------
+
+Run the test with arguments:
+```
+$ adb shell am instrument -w -e server_host <hostname or ip address> -e server_port 8030 -e server_host_override foo.test.google.fr -e use_tls true -e use_test_ca true -e test_case all io.grpc.android.integrationtest/.TesterInstrumentation
+```
+
+If the test passed successfully, it will output:
+```
+INSTRUMENTATION_RESULT: grpc test result=Succeed!!!
+INSTRUMENTATION_CODE: 0
+```
+otherwise, output something like:
+```
+INSTRUMENTATION_RESULT: grpc test result=Failed... : <exception stacktrace if applicable>
+INSTRUMENTATION_CODE: 1
+```

android-interop-testing/app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 22
+    buildToolsVersion '22.0.1'
+
+    defaultConfig {
+        applicationId "io.grpc.android.integrationtest"
+        minSdkVersion 18
+        targetSdkVersion 22
+        versionCode 1
+        versionName "1.0"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile 'com.android.support:appcompat-v7:22.1.1'
+    compile 'com.google.android.gms:play-services-base:7.3.0'
+    compile 'com.google.code.findbugs:jsr305:3.0.0'
+    compile 'com.google.guava:guava:18.0'
+    compile 'com.squareup.okhttp:okhttp:2.2.0'
+    testCompile 'junit:junit:4.12'
+    // You need to build grpc-java to obtain these libraries below.
+    compile 'io.grpc:grpc-core:0.8.0-SNAPSHOT'
+    compile 'io.grpc:grpc-protobuf-nano:0.8.0-SNAPSHOT'
+    compile 'io.grpc:grpc-okhttp:0.8.0-SNAPSHOT'
+    compile 'io.grpc:grpc-stub:0.8.0-SNAPSHOT'
+}

android-interop-testing/app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /Users/thagikura/android-sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}

android-interop-testing/app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="io.grpc.android.integrationtest" >
+
+    <uses-permission android:name="android.permission.INTERNET" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:theme="@style/Base.V7.Theme.AppCompat.Light" >
+        <activity
+            android:name=".TesterActivity"
+            android:label="@string/app_name" >
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <meta-data
+            android:name="com.google.android.gms.version"
+            android:value="@integer/google_play_services_version" />
+    </application>
+
+    <instrumentation android:functionalTest="true"
+    android:label="@string/app_name"
+    android:name=".TesterInstrumentation"
+    android:targetPackage="io.grpc.android.integrationtest" />
+
+</manifest>