Add a java binary, a java library, and an android app target building to bp2build ci.

Excluding cc jni targets as they currently don't compile (but the app does).
Adding the --fat_apk_cpu=k8 flag to common.bazelrc as it only applies to android app building rules, and it is currently required to successfully build them.
Forcing the use of the checked in Java JDK to avoid falling back to the local machine's JDK.

Test: ./build/bazel/ci/bp2build.sh runs successfully
Change-Id: I0f107d334f00c6ac7d91396a70c5023e48b6742b
Bug: 195786204
Bug: 195786195
Bug: 194639753

4 files changed, 39 insertions, 11 deletions

diff --git a/examples/android_app/java/com/app/BUILD b/examples/android_app/java/com/app/BUILD
index 5f70697e..f80585a7 100644
--- a/examples/android_app/java/com/app/BUILD
+++ b/examples/android_app/java/com/app/BUILD
@@ -9,17 +9,17 @@ android_binary(
 )
 
 android_library(
-  name = "applib",
-  srcs = [
-      "MainActivity.java",
-      #"Jni.java", # TODO: integrate JNI
-  ],
-  resource_files = glob(["res/**"]),
-  manifest = "AndroidManifest.xml",
-  deps = [
-    ":lib",
-    #":jni", # TODO: integrate JNI
-  ]
+    name = "applib",
+    srcs = [
+        "MainActivity.java",
+        #"Jni.java", # TODO: integrate JNI
+    ],
+    manifest = "AndroidManifest.xml",
+    resource_files = glob(["res/**"]),
+    deps = [
+        ":lib",
+        #":jni", # TODO: integrate JNI
+    ],
 )
 
 android_library(
diff --git a/examples/java/com/bazel/BUILD.bazel b/examples/java/com/bazel/BUILD.bazel
new file mode 100644
index 00000000..6f96f9d3
--- /dev/null
+++ b/examples/java/com/bazel/BUILD.bazel
@@ -0,0 +1,11 @@
+java_binary(
+  name = "hello_java",
+  srcs = ["example/HelloWorld.java"],
+  main_class = "com.bazel.example.HelloWorld",
+  deps = [":hello_java_lib"],
+)
+
+java_library(
+  name = "hello_java_lib",
+  srcs = ["example_lib/HelloLib.java"],
+)
diff --git a/examples/java/com/bazel/example/HelloWorld.java b/examples/java/com/bazel/example/HelloWorld.java
new file mode 100644
index 00000000..d74bb89b
--- /dev/null
+++ b/examples/java/com/bazel/example/HelloWorld.java
@@ -0,0 +1,10 @@
+package com.bazel.example;
+
+import com.bazel.example_lib.HelloLib;
+
+public class HelloWorld {
+  public static void main(String[] args) {
+    System.out.println("Hello world!");
+    System.out.println("Library says: " + HelloLib.libValue());
+  }
+}
diff --git a/examples/java/com/bazel/example_lib/HelloLib.java b/examples/java/com/bazel/example_lib/HelloLib.java
new file mode 100644
index 00000000..8937060b
--- /dev/null
+++ b/examples/java/com/bazel/example_lib/HelloLib.java
@@ -0,0 +1,7 @@
+package com.bazel.example_lib;
+
+public class HelloLib {
+  public static String libValue() {
+    return "Hello Library!";
+  }
+}