Support libraries that package native libraries

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+/.idea/

app/.gitignore

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+/build

app/CMakeLists.txt

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+# Sets the minimum version of CMake required to build the native
+# library. You should either keep the default value or only pass a
+# value of 3.4.0 or lower.
+
+cmake_minimum_required(VERSION 3.4.1)
+
+# Creates and names a library, sets it as either STATIC
+# or SHARED, and provides the relative paths to its source code.
+# You can define multiple libraries, and CMake builds it for you.
+# Gradle automatically packages shared libraries with your APK.
+
+add_library( # Sets the name of the library.
+             native-lib
+
+             # Sets the library as a shared library.
+             SHARED
+
+             # Provides a relative path to your source file(s).
+             # Associated headers in the same location as their source
+             # file are automatically included.
+             src/main/cpp/native-lib.cpp )
+
+# Searches for a specified prebuilt library and stores the path as a
+# variable. Because system libraries are included in the search path by
+# default, you only need to specify the name of the public NDK library
+# you want to add. CMake verifies that the library exists before
+# completing its build.
+
+find_library( # Sets the name of the path variable.
+              log-lib
+
+              # Specifies the name of the NDK library that
+              # you want CMake to locate.
+              log )
+
+# Specifies libraries CMake should link to your target library. You
+# can link multiple libraries, such as libraries you define in the
+# build script, prebuilt third-party libraries, or system libraries.
+
+target_link_libraries( # Specifies the target library.
+                       native-lib
+
+                       # Links the target library to the log library
+                       # included in the NDK.
+                       ${log-lib} )

app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+  compileSdkVersion 24
+  buildToolsVersion "25.0.0"
+  defaultConfig {
+    applicationId "xyz.rocko.rsnl"
+    minSdkVersion 14
+    targetSdkVersion 19
+    versionCode 1
+    versionName "1.0"
+    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    externalNativeBuild {
+      cmake {
+        cppFlags ""
+      }
+    }
+  }
+  buildTypes {
+    release {
+      minifyEnabled false
+      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+    }
+  }
+  externalNativeBuild {
+    cmake {
+      path "CMakeLists.txt"
+    }
+  }
+}
+
+dependencies {
+  compile fileTree(dir: 'libs', include: ['*.jar'])
+  androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
+    exclude group: 'com.android.support', module: 'support-annotations'
+  })
+  compile 'com.android.support:appcompat-v7:24.2.1'
+  testCompile 'junit:junit:4.12'
+  testCompile "org.robolectric:robolectric:3.1.4"
+}

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/rocko/Library/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 *;
+#}

app/src/androidTest/java/xyz/rocko/rsnl/ExampleInstrumentedTest.java

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+package xyz.rocko.rsnl;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumentation test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class) public class ExampleInstrumentedTest {
+  @Test public void useAppContext() throws Exception {
+    // Context of the app under test.
+    Context appContext = InstrumentationRegistry.getTargetContext();
+
+    assertEquals("xyz.rocko.rsnl", appContext.getPackageName());
+  }
+}

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="xyz.rocko.rsnl">
+
+  <application
+      android:name=".NativeLibsApplication"
+      android:allowBackup="true"
+      android:icon="@mipmap/ic_launcher"
+      android:label="@string/app_name"
+      android:supportsRtl="true"
+      android:theme="@style/AppTheme">
+    <activity android:name=".MainActivity">
+      <intent-filter>
+        <action android:name="android.intent.action.MAIN"/>
+
+        <category android:name="android.intent.category.LAUNCHER"/>
+      </intent-filter>
+    </activity>
+  </application>
+
+</manifest>

app/src/main/cpp/make_macOS_dylib.sh

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+#!/usr/bin/env bash
+
+OUTPUT=../../../build/intermediates/dylibs
+mkdir -p ${OUTPUT}
+
+# .o file
+cc -c -I/System/Library/Frameworks/JavaVM.framework/Headers *.cpp -o ${OUTPUT}/libnative-lib.o
+
+# .dylib file
+g++ -dynamiclib -undefined suppress -flat_namespace ${OUTPUT}/*.o -o ${OUTPUT}/libnative-lib.dylib

app/src/main/cpp/native-lib.cpp

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+#include <jni.h>
+#include <string>
+
+extern "C"
+jstring
+Java_xyz_rocko_rsnl_nativeinterface_NativeSample_stringFromJNI(
+        JNIEnv *env,
+        jobject /* this */) {
+    //    简单返回个字符串
+    std::string hello = "Hello from Native.";
+    return env->NewStringUTF(hello.c_str());
+}

app/src/main/java/xyz/rocko/rsnl/MainActivity.java

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+package xyz.rocko.rsnl;
+
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.widget.TextView;
+import xyz.rocko.rsnl.nativeinterface.NativeSample;
+
+public class MainActivity extends AppCompatActivity {
+
+
+
+  @Override protected void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    setContentView(R.layout.activity_main);
+
+    // Example of a call to a native method
+    TextView tv = (TextView) findViewById(R.id.sample_text);
+    tv.setText(NativeSample.stringFromJNI());
+  }
+
+}

app/src/main/java/xyz/rocko/rsnl/NativeLibsApplication.java

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+package xyz.rocko.rsnl;
+
+import android.app.Application;
+import xyz.rocko.rsnl.nativeinterface.NativeLibrariesManager;
+
+/**
+ * Created by rocko on 2016/11/26.
+ */
+
+public class NativeLibsApplication extends Application {
+
+  @Override public void onCreate() {
+    super.onCreate();
+    loadNativeLibraries();
+  }
+
+  /**
+   * 简单让子类可自己实现
+   */
+  protected void loadNativeLibraries() {
+    NativeLibrariesManager.loadNativeLibraries();
+  }
+}

app/src/main/java/xyz/rocko/rsnl/nativeinterface/NativeLibrariesManager.java

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+package xyz.rocko.rsnl.nativeinterface;
+
+/**
+ * Created by rocko on 2016/11/26.
+ */
+
+public class NativeLibrariesManager {
+
+
+  // Used to load the 'native-lib' library on application startup.
+  static {
+    System.loadLibrary("native-lib");
+  }
+
+  public static void loadNativeLibraries() {
+    // no-op
+  }
+}

app/src/main/java/xyz/rocko/rsnl/nativeinterface/NativeSample.java

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+package xyz.rocko.rsnl.nativeinterface;
+
+/**
+ * Created by rocko on 2016/11/26.
+ */
+
+public class NativeSample {
+
+  /**
+   * A native method that is implemented by the 'native-lib' native library,
+   * which is packaged with this application.
+   */
+  public static native String stringFromJNI();
+}

app/src/main/res/layout/activity_main.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/activity_main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    tools:context="xyz.rocko.rsnl.MainActivity"
+    >
+
+  <TextView
+      android:id="@+id/sample_text"
+      android:layout_width="wrap_content"
+      android:layout_height="wrap_content"
+      android:text="Hello World!"
+      />
+</RelativeLayout>

app/src/main/res/values-w820dp/dimens.xml

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+<resources>
+  <!-- Example customization of dimensions originally defined in res/values/dimens.xml
+         (such as screen margins) for screens with more than 820dp of available width. This
+         would include 7" and 10" devices in landscape (~960dp and ~1280dp respectively). -->
+  <dimen name="activity_horizontal_margin">64dp</dimen>
+</resources>

app/src/main/res/values/colors.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <color name="colorPrimary">#3F51B5</color>
+  <color name="colorPrimaryDark">#303F9F</color>
+  <color name="colorAccent">#FF4081</color>
+</resources>

app/src/main/res/values/dimens.xml

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+<resources>
+  <!-- Default screen margins, per the Android Design guidelines. -->
+  <dimen name="activity_horizontal_margin">16dp</dimen>
+  <dimen name="activity_vertical_margin">16dp</dimen>
+</resources>

app/src/main/res/values/strings.xml

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+<resources>
+  <string name="app_name">RobolectricSupportNativeLibs</string>
+</resources>

app/src/main/res/values/styles.xml

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+<resources>
+
+  <!-- Base application theme. -->
+  <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+    <!-- Customize your theme here. -->
+    <item name="colorPrimary">@color/colorPrimary</item>
+    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+    <item name="colorAccent">@color/colorAccent</item>
+  </style>
+
+</resources>

app/src/test/java/xyz/rocko/rsnl/RobolectricNativeTest.java

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+package xyz.rocko.rsnl;
+
+import android.util.Log;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+import xyz.rocko.rsnl.base.BaseRobolectricTestCase;
+import xyz.rocko.rsnl.nativeinterface.NativeSample;
+
+import static org.junit.Assert.*;
+
+/**
+ * Robolectric load native code test
+ */
+@RunWith(RobolectricTestRunner.class)
+public class RobolectricNativeTest extends BaseRobolectricTestCase {
+
+  private static final String TAG = "RobolectricNativeTest";
+
+  @Test public void addition_isCorrect() throws Exception {
+    assertEquals(4, 2 + 2);
+  }
+
+  @Test public void testLoadNativeLibrariesSuccess() throws Exception {
+    String nativeExcepted = "Hello from Native.";
+    String result = NativeSample.stringFromJNI();
+    Log.d(TAG, "result: " + result);
+    assertEquals(nativeExcepted, result);
+  }
+}

app/src/test/java/xyz/rocko/rsnl/base/BaseRobolectricTestCase.java

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+package xyz.rocko.rsnl.base;
+
+import android.os.Build;
+import org.robolectric.annotation.Config;
+import xyz.rocko.rsnl.BuildConfig;
+
+/**
+ * Created by rocko on 2016/11/26.
+ */
+@Config(sdk = Build.VERSION_CODES.KITKAT, application = RobolectricApplication.class, constants = BuildConfig.class)
+public class BaseRobolectricTestCase {
+}