example/bind: Android studio example.

Change-Id: I4729e47a4a3c4474f4ad53704e7fec337583d9e2
Reviewed-on: https://go-review.googlesource.com/12800
Reviewed-by: David Crawshaw <crawshaw@golang.org>

example/bind/android/README

@@ -0,0 +1,4 @@
+Go bind android app example
+
+Set the GOPATH, GO, GOMOBILE variables in hello/build.gradle
+and import this project in Android Studio.

example/bind/android/app/build.gradle

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2015 The Go Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file.
+ */
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 22
+    buildToolsVersion "22.0.1"
+
+    defaultConfig {
+        applicationId "org.golang.example.android"
+        minSdkVersion 15
+        targetSdkVersion 22
+        versionCode 1
+        versionName "1.0"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(include: ['*.jar'], dir: 'libs')
+    compile 'com.android.support:appcompat-v7:22.1.1'
+    compile project(':hello')
+}

example/bind/android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2015 The Go Authors. All rights reserved.
+     Use of this source code is governed by a BSD-style
+     license that can be found in the LICENSE file.  -->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="org.golang.example.bind" >
+
+    <application
+        android:allowBackup="true"
+        android:label="GoBindExample">
+        <activity
+            android:name=".MainActivity"
+            android:label="GoBindExample" >
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

example/bind/android/app/src/main/java/org/golang/example/bind/MainActivity.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2015 The Go Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file.
+ */
+
+package org.golang.example.bind;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.widget.TextView;
+
+import go.hello.Hello;
+
+
+public class MainActivity extends Activity {
+
+    private TextView mTextView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+        mTextView = (TextView) findViewById(R.id.mytextview);
+
+        // Call Go function.
+        String greetings = Hello.Greetings("Android and Gopher");
+        mTextView.setText(greetings);
+    }
+}

example/bind/android/app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,17 @@
+<!-- Copyright 2015 The Go Authors. All rights reserved.
+     Use of this source code is governed by a BSD-style
+     license that can be found in the LICENSE file. -->
+
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
+    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:id="@+id/mytextview" />
+
+</RelativeLayout>

example/bind/android/app/src/main/res/values/dimens.xml

@@ -0,0 +1,8 @@
+<!-- Copyright 2015 The Go Authors. All rights reserved.
+     Use of this source code is governed by a BSD-style
+     license that can be found in the LICENSE file.  -->
+<resources>
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
+</resources>

example/bind/android/build.gradle

@@ -0,0 +1,22 @@
+/* Copyright 2015 The Go Authors. All rights reserved.
+ *  Use of this source code is governed by a BSD-style
+ *  license that can be found in the LICENSE file.
+ */
+
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:1.2.3'
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+allprojects {
+    repositories {
+        jcenter()
+    }
+}

example/bind/android/hello/build.gradle

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+/* Copyright 2015 The Go Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file.
+ */
+
+plugins {
+    id "org.golang.mobile.bind" version "0.2.2"
+}
+
+gobind {
+    /* The Go package path; must be under one of the GOPATH elements or
+     a relative to the current directory (e.g. ../../hello) */
+    pkg = "golang.org/x/mobile/example/bind/hello"
+
+    /* GOPATH where the Go package is; check `go env` */
+    GOPATH = "/YOUR/GOPATH"
+
+    /* Absolute path to the go binary */
+    GO = "/PATH/TO/GO"
+
+    /* Absolute path to the gomobile binary */
+    GOMOBILE = "/PATH/TO/GOMOBILE"
+}

example/bind/android/settings.gradle

@@ -0,0 +1,5 @@
+/* Copyright 2015 The Go Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file.
+ */
+include ':app', ':hello'

example/bind/hello/hello.go

@@ -0,0 +1,12 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package hello is a trivial package for gomobile bind example.
+package hello
+
+import "fmt"
+
+func Greetings(name string) string {
+	return fmt.Sprintf("Hello, %s!", name)
+}