src/api-impl: add misc stubs, fix indentation

src/api-impl/android/app/Activity.java

@@ -3,6 +3,7 @@ package android.app;
 import android.content.Context;
 import android.content.ComponentName;
 import android.content.Intent;
+import android.content.res.Configuration;
 import android.os.Bundle;
 
 import android.widget.TextView;
@@ -116,6 +117,15 @@ public class Activity extends Context {
 		return;
 	}
 
+	protected void onSaveInstanceState(Bundle outState) {
+	}
+
+	void onConfigurationChanged(Configuration newConfig) {
+	}
+
+	public void onLowMemory() {
+	}
+
 	/* --- */
 
     public void setContentView(int layoutResID) throws Exception {

src/api-impl/android/content/Context.java

@@ -47,6 +47,7 @@ public class Context extends Object {
 	File data_dir = null;
 	File prefs_dir = null;
 	File files_dir = null;
+	File obb_dir = null;
 	File cache_dir = null;
 
 	static {
@@ -162,6 +163,17 @@ public class Context extends Object {
 		return files_dir;
 	}
 
+	public File getExternalFilesDir(String type) {
+		return getFilesDir();
+	}
+
+	public File getObbDir() {
+	if (obb_dir == null) {
+			obb_dir = new File(getDataDirFile(), "obb");
+		}
+		return obb_dir;
+	}
+
 	// FIXME: should be something like /tmp/cache, but may need to create that directory
 	public File getCacheDir() {
 			if (cache_dir == null) {