Time for action – creating a Java UI

Let's create a new Java project with a JNI module.

1. Create a new hybrid Java/C++ project as shown in Chapter 2, Starting a Native Android Project:
   • Name it RenderScript.
   • The main package is com.packtpub.renderscript.
   • minSdkVersion is 9 and targetSdkVersion is 19.
   • Define the android.permission.WRITE_EXTERNAL_STORAGE permission in the AndroidManifest.xml file.
   • Turn the project into a native project as already seen.
   • Remove the native source and header files that have been created by ADT.
   • Name the main Activity RenderScriptActivity and its layout activity_renderscript.xml.
2. Define the project.properties file as follows. These lines activate the RenderScript support library, which allows porting code to older devices until API 8:

   target=android-20
   renderscript.target=20
   renderscript.support.mode=true
   sdk.buildtools=20
   

3. Modify res/activity_renderscript.xml to make it look as follows. We will need:
   • A SeekBar to define the blur radius
   • A Button to apply the blur...