7 files changed, 132 insertions, 0 deletions
diff --git a/hello_world/plugin/.gitignore b/hello_world/plugin/.gitignore
new file mode 100644
index 0000000..796b96d
--- /dev/null
+++ b/hello_world/plugin/.gitignore
@@ -0,0 +1 @@
+/build
diff --git a/hello_world/plugin/build.gradle b/hello_world/plugin/build.gradle
new file mode 100644
index 0000000..2d1e7fa
--- /dev/null
+++ b/hello_world/plugin/build.gradle
@@ -0,0 +1,34 @@
+apply plugin: 'com.android.library'
+
+android {
+    compileSdkVersion 29
+    buildToolsVersion "29.0.1"
+
+    defaultConfig {
+        minSdkVersion 18
+        targetSdkVersion 29
+        versionCode 1
+        versionName "1.0"
+    }
+
+    // Used to customize the name of generated AAR file.
+    libraryVariants.all { variant ->
+        variant.outputs.all { output ->
+            output.outputFileName = "HelloWorld.${variant.name}.aar"
+        }
+    }
+
+}
+
+dependencies {
+    /*
+    Used to provide dependency on the Godot Android library. A version of that
+    library will be made available for each stable release of Godot.
+
+    `compileOnly` is used instead of `implementation` to ensure that the
+     godot library is not bundled with the generated plugin AAR file. This is
+     necessary since the Godot editor will also provide a version of the godot
+     library when building the final binary.
+     */
+    compileOnly fileTree(dir: 'libs', include: ['godot-lib*.aar'])
+}
diff --git a/hello_world/plugin/libs/godot-lib.release.aar b/hello_world/plugin/libs/godot-lib.release.aar
new file mode 100644
index 0000000..ee116a4
--- /dev/null
+++ b/hello_world/plugin/libs/godot-lib.release.aar
diff --git a/hello_world/plugin/src/main/AndroidManifest.xml b/hello_world/plugin/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..63ec50f
--- /dev/null
+++ b/hello_world/plugin/src/main/AndroidManifest.xml
@@ -0,0 +1,20 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="fhuyakou.godot.plugin.android.helloworld">
+
+  <application>
+    <!--
+    Plugin metadata:
+
+    - In the `android:name` attribute, the `org.godotengine.plugin.v2` prefix
+    is required so Godot can recognize the project as a valid Godot
+    Android plugin. The plugin name following the prefix should match the value
+    of the plugin name returned by the plugin initializer.
+
+    - The `android:value` attribute should be the classpath to the plugin
+    initializer.
+    -->
+    <meta-data
+        android:name="org.godotengine.plugin.v2.HelloWorld"
+        android:value="fhuyakou.godot.plugin.android.helloworld.HelloWorldPlugin" />
+  </application>
+</manifest>
diff --git a/hello_world/plugin/src/main/java/fhuyakou/godot/plugin/android/helloworld/HelloWorldPlugin.java b/hello_world/plugin/src/main/java/fhuyakou/godot/plugin/android/helloworld/HelloWorldPlugin.java
new file mode 100644
index 0000000..fe0a319
--- /dev/null
+++ b/hello_world/plugin/src/main/java/fhuyakou/godot/plugin/android/helloworld/HelloWorldPlugin.java
@@ -0,0 +1,57 @@
+package fhuyakou.godot.plugin.android.helloworld;
+
+import android.app.Activity;
+import android.view.View;
+import java.util.Collections;
+import java.util.List;
+import org.godotengine.godot.Godot;
+import org.godotengine.godot.plugin.GodotPlugin;
+
+public class HelloWorldPlugin extends GodotPlugin {
+
+  private static final String HELLO_WORLD = "Hello World";
+
+  private View helloWorldContainer;
+
+  public HelloWorldPlugin(Godot godot) {
+    super(godot);
+  }
+
+  @Override
+  public String getPluginName() {
+    return "HelloWorld";
+  }
+
+  @Override
+  public List<String> getPluginMethods() {
+    return Collections.singletonList("helloWorld");
+  }
+
+  @Override
+  public View onMainCreateView(Activity activity) {
+    View view = activity.getLayoutInflater().inflate(R.layout.hello_world_view, null);
+    helloWorldContainer = view.findViewById(R.id.hello_world_container);
+    return view;
+  }
+
+  /**
+   * Show/hide, print and return "Hello World".
+   */
+  public String helloWorld() {
+    if (helloWorldContainer != null) {
+      helloWorldContainer.post(new Runnable() {
+        @Override
+        public void run() {
+          if (helloWorldContainer.getVisibility() == View.VISIBLE) {
+            helloWorldContainer.setVisibility(View.GONE);
+          } else {
+            helloWorldContainer.setVisibility(View.VISIBLE);
+          }
+        }
+      });
+    }
+
+    System.out.println(HELLO_WORLD);
+    return HELLO_WORLD;
+  }
+}
diff --git a/hello_world/plugin/src/main/res/layout/hello_world_view.xml b/hello_world/plugin/src/main/res/layout/hello_world_view.xml
new file mode 100644
index 0000000..e831d87
--- /dev/null
+++ b/hello_world/plugin/src/main/res/layout/hello_world_view.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/hello_world_container"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:visibility="gone">
+
+  <TextView
+      android:layout_width="wrap_content"
+      android:layout_height="wrap_content"
+      android:layout_gravity="center"
+      android:padding="10dp"
+      android:text="@string/hello_world"
+      android:textSize="20sp" />
+
+</FrameLayout>
+\ No newline at end of file
diff --git a/hello_world/plugin/src/main/res/values/strings.xml b/hello_world/plugin/src/main/res/values/strings.xml
new file mode 100644
index 0000000..d2cf3ac
--- /dev/null
+++ b/hello_world/plugin/src/main/res/values/strings.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <string name="hello_world">Hello World</string>
+</resources>
+\ No newline at end of file