android-version

I am developing an application for Froyo as minimum version and Gingerbread as the target version. So, the manifest shows: <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="10"/> I have an emulator and a Nexus One with Gingerbread, and the application deploys and installs correctly. But when it starts, it crashes, and the error thrown in the log is: 09-18 06:35:11.240: ERROR/AndroidRuntime(382): FATAL EXCEPTION: main 09-18 06:35:11.240: ERROR/AndroidRuntime(382): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.my.package/com.my.package.Dashboard}: java

I know there are a lot of questions on here about Android API Level and Version but this question is different so please don't mark it as a duplicate. I am wondering how Java version 1.6, 1.7, 1.8... relates to those two. The source of my confusion is me trying to use the Pattern.compile method with the Pattern.UNICODE_CHARACTER_CLASS flag as seen below. Pattern pattern = Pattern.compile("\\b" + keywordToCheck + "\\b", Pattern.UNICODE_CHARACTER_CLASS); From the docs on Pattern.UNICODE_CHARACTER_CLASS it says that it says Since: 1.7, which I assume to mean it is available in Java version 1.7

I am writing an app for android (2.1 > 3.1) and I would like to use the familiar practice of using the app Icon in Honeycomb apps to go up to the home activity, however, when I run the activity on earlier, non Honeycomb devices where the Activity.getActionBar(); method does not exist yet, the app force closes, how can I only run this specified code if the device is running honeycomb? @Override protected void onStart() { super.onStart(); ActionBar actionBar = this.getActionBar(); actionBar.setDisplayHomeAsUpEnabled(true); } Thanks for any help and have a great day. Android pre-Honeycomb doesn't