Fix examples/android code to actually run successfully

- Add a manifest with a main activity to launch
- Use ``${lib_name}`` manifest variable in order to reuse the same manifest from multiple libs and inherit the right `MainActivity` from the right lib
- Define `resource_files` attr to actually include the resource dir. Modify the code to actually use the resources.
- Fixed the code to extend from `AppCompatActivity` in order to actually use `androidx.appcompat` and not crash on launch
- Renamed `lib` target to `my_kt` and `lib2` to `my_android` in order to make it easier to distinguish between the generated output files during debugging.
- Added `my_java` target to help with debugging when comparing plugin generation for java vs native android vs kotlin
- Added `.bazelproject` file for IDE

examples/android/.bazelproject

@@ -0,0 +1,17 @@
+directories:
+  # Add the directories you want added as source here
+  # By default, we've added your entire workspace ('.')
+  .
+
+# Automatically includes all relevant targets under the 'directories' above
+derive_targets_from_directories: true
+
+targets:
+  # If source code isn't resolving, add additional targets that compile it here
+  //...:all
+additional_languages:
+  kotlin
+
+
+# Please uncomment an android-SDK platform. Available SDKs are:
+android_sdk_platform: android-29

examples/android/app/BUILD.bazel

@@ -8,32 +8,41 @@ android_binary(
     incremental_dexing = 0,
     manifest = "src/main/AndroidManifest.xml",
     multidex = "native",
+    manifest_values = {
+        "lib_name": "lib",
+    },
     deps = [
-        "//lib",
+        "//libKtAndroid:my_kt",
     ],
 )
 
 # An app that consumes jvm-kt libs
 android_binary(
     name = "app2",
-    custom_package = "examples.android.app",
+    custom_package = "examples.android.app2",
     incremental_dexing = 0,
     manifest = "src/main/AndroidManifest.xml",
     multidex = "native",
+    manifest_values = {
+		"lib_name": "lib2",
+	},
     deps = [
-        "//lib2",
+        "//libAndroid:my_android",
     ],
 )
 
 # An app that consumes android-kt deps, and does incremental dexing.
 android_binary(
     name = "app3",
-    custom_package = "examples.android.app",
+    custom_package = "examples.android.app3",
     incremental_dexing = 1,
     manifest = "src/main/AndroidManifest.xml",
     multidex = "native",
+    manifest_values = {
+		"lib_name": "lib",
+	},
     deps = [
-        "//lib",
+        "//libKtAndroid:my_kt",
     ],
 )
 
@@ -44,4 +53,4 @@ build_test(
         ":app2.apk",
         ":app3.apk",
     ],
-)
+)

examples/android/app/src/main/AndroidManifest.xml

@@ -2,7 +2,23 @@
 <manifest
     xmlns:android="http://schemas.android.com/apk/res/android"
     package="examples.android.app">
-  <uses-sdk android:minSdkVersion="23"
+  <uses-sdk
+      android:minSdkVersion="23"
       android:targetSdkVersion="23"
       android:maxSdkVersion="29" />
-</manifest>
+
+  <application
+      android:label="Rules Kotlin App"
+      android:theme="@style/Theme.AppCompat.Light.NoActionBar">
+
+    <activity
+        android:name="examples.android.${lib_name}.MainActivity"
+        android:label="Bazel Tutorial App" >
+      <intent-filter>
+        <action android:name="android.intent.action.MAIN" />
+        <category android:name="android.intent.category.LAUNCHER" />
+      </intent-filter>
+    </activity>
+  </application>
+
+</manifest>

examples/android/lib2/BUILD.bazel → examples/android/libAndroid/BUILD.bazel

@@ -2,11 +2,12 @@ load("@io_bazel_rules_kotlin//kotlin:kotlin.bzl", "kt_jvm_library")
 load("@build_bazel_rules_android//android:rules.bzl", "android_library")
 
 android_library(
-    name = "lib2",
+    name = "my_android",
     srcs = glob(["src/main/java/**/*.java"]),
     custom_package = "examples.android.lib2",
     manifest = "src/main/AndroidManifest.xml",
     visibility = ["//visibility:public"],
+    resource_files = glob(["res/**"]),
     deps = [
         ":util",
         "@maven//:androidx_appcompat_appcompat",

examples/android/libAndroid/src/main/AndroidManifest.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest package="examples.android.lib2"
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <uses-sdk
+        android:minSdkVersion="23"
+        android:targetSdkVersion="23"
+        android:maxSdkVersion="29" />
+</manifest>

examples/android/lib2/src/main/java/examples/android/lib2/MainActivity.java → examples/android/libAndroid/src/main/java/examples/android/lib2/MainActivity.java

@@ -1,13 +1,13 @@
 package examples.android.lib2;
 
-import android.app.Activity;
 import android.os.Bundle;
 import android.widget.Button;
 import android.widget.LinearLayout;
 import android.widget.LinearLayout.LayoutParams;
 import androidx.appcompat.app.AlertDialog;
+import androidx.appcompat.app.AppCompatActivity;
 
-public class MainActivity extends Activity {
+public class MainActivity extends AppCompatActivity {
   @Override protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     LinearLayout parent = new LinearLayout(this);
@@ -19,7 +19,7 @@ public class MainActivity extends Activity {
 
     new AlertDialog.Builder(this)
         .setTitle("Blah")
-        .setMessage("Blah blah blah?")
+        .setMessage(R.string.little_bat)
         .show();
   }
 }

examples/android/libJava/BUILD.bazel

@@ -0,0 +1,22 @@
+load("@rules_java//java:defs.bzl", "java_plugin")
+
+java_plugin(
+    name = "autovalue",
+    generates_api = 1,
+    processor_class = "com.google.auto.value.processor.AutoValueProcessor",
+    deps = ["@maven//:com_google_auto_value_auto_value"],
+)
+
+java_library(
+    name = "my_java",
+    srcs = [
+        "src/main/java/examples/java/lib/JavaAutoValueProvider.java",
+        "src/main/java/examples/java/lib/TestJavaValue.java",
+    ],
+    plugins = [
+        ":autovalue",
+    ],
+    deps = [
+        "@maven//:com_google_auto_value_auto_value_annotations",
+    ],
+)

examples/android/libJava/src/main/java/examples/java/lib/JavaAutoValueProvider.java

@@ -0,0 +1,9 @@
+package examples.java.lib;
+
+public class JavaAutoValueProvider {
+
+    public TestJavaValue getAutoValue() {
+        return new AutoValue_TestJavaValue.Builder().setName("Auto Value Test").build();
+
+    }
+}

examples/android/libJava/src/main/java/examples/java/lib/TestJavaValue.java

@@ -0,0 +1,19 @@
+package examples.java.lib;
+
+import com.google.auto.value.AutoValue;
+
+@AutoValue
+public abstract class TestJavaValue {
+    abstract String name();
+
+    Builder builder() {
+        return new AutoValue_TestJavaValue.Builder();
+    }
+
+    @AutoValue.Builder
+    abstract static class Builder {
+        abstract Builder setName(String name);
+
+        abstract TestJavaValue build();
+    }
+}

examples/android/lib/BUILD.bazel → examples/android/libKtAndroid/BUILD.bazel

@@ -19,8 +19,8 @@ java_plugin(
 )
 
 kt_android_library(
-    name = "lib",
-    srcs = glob(["src/main/kotlin/**/*.kt"]),
+    name = "my_kt",
+    srcs = glob(["src/main/java/**/*.kt"]),
     custom_package = "examples.android.lib",
     manifest = "src/main/AndroidManifest.xml",
     plugins = [
@@ -29,9 +29,10 @@ kt_android_library(
     ],
     tags = ["trace"],
     visibility = ["//visibility:public"],
+    resource_files = glob(["res/**"]),
     deps = [
         "@maven//:androidx_appcompat_appcompat",
         "@maven//:com_google_auto_value_auto_value_annotations",
         "@maven//:org_jetbrains_kotlinx_kotlinx_serialization_runtime",
     ],
-)
+)

examples/android/libKtAndroid/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+  <string name="where_you_at">Where you at?</string>
+</resources>

examples/android/libKtAndroid/src/main/AndroidManifest.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest package="examples.android.lib"
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <uses-sdk
+        android:minSdkVersion="23"
+        android:targetSdkVersion="23"
+        android:maxSdkVersion="29" />
+</manifest>

examples/android/lib/src/main/kotlin/examples/android/lib/MainActivity.kt → examples/android/libKtAndroid/src/main/java/examples/android/lib/MainActivity.kt

@@ -1,23 +1,24 @@
 package examples.android.lib
 
-import android.app.Activity
+import androidx.appcompat.app.AlertDialog
 import android.os.Bundle
 import android.widget.Button
 import android.widget.LinearLayout
 import android.widget.LinearLayout.LayoutParams
-import androidx.appcompat.app.AlertDialog
+import androidx.appcompat.app.AppCompatActivity
+
+class MainActivity : AppCompatActivity() {
 
-class MainActivity : Activity() {
   override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
     val parent = LinearLayout(this).apply {
       orientation = LinearLayout.VERTICAL
     }.also { it.addView(Button(this).apply { text = "Foo!" }) }
     setContentView(parent, LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT))
     AlertDialog.Builder(this)
-        .setTitle("Blah")
-        .setMessage("Blah blah blah?")
-        .show()
+      .setTitle(this.getString(R.string.where_you_at))
+      .setMessage("Blah blah blah?")
+      .show()
     // Ensure Serialization plugin has run and generated code correctly.
     Data.serializer()