example/sprite: make example lives

Add necessary files to build and run example/sprite.
Change main.go to get image from assets.

Change-Id: Ic3065aab97f59c34f2c0446ab4b46840305b5864
Reviewed-on: https://go-review.googlesource.com/1882
Reviewed-by: David Crawshaw <crawshaw@golang.org>

example/sprite/AndroidManifest.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2014 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="com.example.sprite"
+	android:versionCode="1"
+	android:versionName="1.0">
+
+	<uses-sdk android:minSdkVersion="9" />
+	<application android:label="Sprite" android:hasCode="false">
+	<activity android:name="android.app.NativeActivity"
+		android:label="Sprite"
+		android:configChanges="orientation|keyboardHidden">
+		<meta-data android:name="android.app.lib_name" android:value="sprite" />
+		<intent-filter>
+			<action android:name="android.intent.action.MAIN" />
+			<category android:name="android.intent.category.LAUNCHER" />
+		</intent-filter>
+	</activity>
+	</application>
+</manifest> 

example/sprite/all.bash

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+# Copyright 2014 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.
+
+# Script to build and launch the app on an android device.
+
+set -e
+
+./make.bash
+
+adb install -r bin/nativeactivity-debug.apk
+
+adb shell am start -a android.intent.action.MAIN \
+	-n com.example.sprite/android.app.NativeActivity

example/sprite/all.bat

@@ -0,0 +1,16 @@
+:: Copyright 2014 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.
+
+@echo off
+
+setlocal
+
+echo # building sprite
+call make.bat
+
+echo # installing bin/nativeactivity-debug.apk
+adb install -r bin/nativeactivity-debug.apk >nul
+
+echo # starting android.app.NativeActivity
+adb shell am start -a android.intent.action.MAIN -n com.example.sprite/android.app.NativeActivity >nul

example/sprite/build.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2014 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.
+-->
+<project name="nativeactivity" default="help">
+	<property name="target" value="android-19" />
+	<property environment="env" />
+	<condition property="sdk.dir" value="${env.ANDROID_HOME}">
+		<isset property="env.ANDROID_HOME" />
+	</condition>
+	<fail message="missing ANDROID_HOME env variable" unless="sdk.dir" />
+	<import file="${sdk.dir}/tools/ant/build.xml" />
+</project>

example/sprite/jni/Android.mk

@@ -0,0 +1,11 @@
+# Copyright 2014 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.
+
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE    := sprite
+LOCAL_SRC_FILES := $(TARGET_ARCH_ABI)/libsprite.so
+
+include $(PREBUILT_SHARED_LIBRARY)

example/sprite/main.go

@@ -8,7 +8,6 @@ import (
 	"image"
 	"log"
 	"math"
-	"os"
 	"time"
 
 	_ "image/jpeg"
@@ -125,12 +124,13 @@ const (
 )
 
 func loadTextures() []sprite.SubTex {
-	f, err := os.Open("../../testdata/waza-gophers.jpeg")
+	a, err := app.Open("waza-gophers.jpeg")
 	if err != nil {
 		log.Fatal(err)
 	}
-	defer f.Close()
-	img, _, err := image.Decode(f)
+	defer a.Close()
+
+	img, _, err := image.Decode(a)
 	if err != nil {
 		log.Fatal(err)
 	}

example/sprite/make.bash

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+# Copyright 2014 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.
+
+set -e
+
+if [ ! -f make.bash ]; then
+	echo 'make.bash must be run from $GOPATH/src/golang.org/x/mobile/example/sprite'
+	exit 1
+fi
+
+mkdir -p jni/armeabi
+CGO_ENABLED=1 GOOS=android GOARCH=arm GOARM=7 \
+	go build -ldflags="-shared" -o jni/armeabi/libsprite.so .
+ndk-build NDK_DEBUG=1
+ant debug

example/sprite/make.bat

@@ -0,0 +1,44 @@
+:: Copyright 2014 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.
+
+@echo off
+
+setlocal
+
+if not exist make.bat goto error-invalid-path
+
+if not exist jni\armeabi mkdir jni\armeabi
+
+set CGO_ENABLED=1
+set GOOS=android
+set GOARCH=arm
+set GOARM=7
+
+go build -ldflags="-shared" -o jni/armeabi/libsprite.so .
+if errorlevel 1 goto error-go-build
+
+if defined NDK_ROOT goto ndk-build
+echo NDK_ROOT path not defined
+goto end
+
+:ndk-build
+call %NDK_ROOT%\ndk-build.cmd NDK_DEBUG=1 >nul
+
+if defined ANT_HOME goto ant-build
+echo ANT_HOME path not defined
+goto end
+
+:ant-build
+call %ANT_HOME%\bin\ant.bat debug >nul
+goto end
+
+:error-invalid-path
+echo make.bat must be run from %%GOPATH%%\src\golang.org\x\mobile\example\sprite
+goto end
+
+:error-go-build
+echo Error building go lib
+goto end
+
+:end