Solution 1: I have a simple program that draws the preview of the Camera into a SurfaceView . What I'm trying to do is using the onPreviewFrame method, which is invoked each time a new frame is drawn into the SurfaceView , in order to execute the invalidate method which is supposed to invoke the onDraw method. In fact, the onDraw method is being invoked, but nothing there is being printed (I guess the camera preview is overwriting the text I'm trying to draw). This is a simplify version of the SurfaceView subclass I have: public class Superficie extends SurfaceView implements SurfaceHolder . Callback { SurfaceHolder mHolder ; public Camera camera ; Superficie ( Context context ) { super ( context ); mHolder = getHolder (); mHolder . addCallback ( this ); mHolder . setType ( SurfaceHolder . SURFACE_TYPE_PUSH_BUFFERS ); } public void surfaceCreated ( final SurfaceHolder holder ) { camera = Camera . open (); try { ...
A task is the stack ("Last in, First out") which contains a collection of activity instances. Normally, when a user starts an app a new task will be created, and the first activity instance is called as a root of the task. The Android system can hold multiple tasks at the same time and only one task is in the foreground. Similar to a double click of the home key on iOS, if you long press the HOME key on Android you'll be presented with a list of your currently running applications. You can select any one of these applications (which are currently running in the background) in order to bring it to the foreground and interact with the app! Of course, because background tasks do tend to use up your processor cycles you should try to keep your backgrounded apps to a minimum to ensure your phone performs optimally. Now let's look at the launch mode of an activity. Launch mode allows you to define how a new instance or the existing instance of an activity ...
Creating the Android Project Create a new Android project in Sybase Unwired WorkSpace. Add library resources to the project and set other application properties. Prerequisites To help create your project—and in a subsequent topic, build the user interface—download the SUP101 Android Object API (2.2 SP02) example project from the SAP Community Network (SCN) Web site at http://scn.sap.com/docs/DOC-8803 . Task Start Sybase Unwired WorkSpace. In Sybase Unwired WorkSpace Preferences, set the Android SDK location. Select File > New > Project . Select Android > Android Application Project , then Next . Depending on the Android version you are using, the information you provide in the next several steps may be in one or two screens. In the New Android Application window, use these values and click Next . Application Name – enter ...
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