Alter canvas

Android Processing

el_dippo

in Android Processing • 1 year ago

Hello all,

I recently bought a Android phone and i managed to create programs for it in Processing 1.5.1. I tried to use 2.06, but i get error messages while compiling (Android mode), so i use 1.5.1. :(
The problem(s) however i currently have, is with the canvas. So i have a few questions about that.

Processing uses the whole screen to display my work, this is a great feature but it also means that it removes the notification bar (the bar that display the battery, time, wifi, BT, USB, notifications, etc etc.). Is there a way to display this bar again? Or is it possible to make my canvas smaller so that the bar is visible at all times?

There was recently a similar question about this, but the question was about the bar with the back, home, settings button that sits at the bottom of the screen (status bar?). On my phone this bar is not part of the screen, but anyhow, there was no answer for this problem. So far i know, Google is busy to make this standard belong to the screen for the new devices. So i want to know if it's possible to display this bar also?

3rd question: Sun/Oracle always demanded that the canvas is visible when you run a Java application. On Android however this demand is obsolete. Is there a way to hide the canvas so that a program can run in the background?

Last question: I still have a problem with the screen orientation. The application restarts when i rotate my phone. This is not a real problem, but there is always a black screen in between before my application shows again. Is there a way to prevent this?

Greetings, Peter.

Replies(1)

calsign

Re: Alter canvas

1 year ago

For displaying the status bar:

Since Android is much broader than Processing, it helps to search the greater web. I came up with this link:

http://blog.thevery.info/2010/11/showhide-status-bar-in-fullscreen.html

There's a lot more where it came from... it seems like most people want to hide the status bar rather than show it, however, suggesting that Processing forces it to be hidden. I'm pretty sure that calling those functions should work... and if you get an error, you might need to import the classes, such as WindowManager. Search for "android" plus the name of the class, and you should get the documentation for it... the package name should be there.

For making the application run in the background:

Unfortunately, similar to the reason that Live Wallpapers cannot be created with Processing, an Activity (what Processing's Android implementation of PApplet is) is an entity that holds a canvas, and thus cannot be run in the background. For that, you'd need something such as a Service...

To fix the screen orientation:

There are two methods that I am aware of.

In setup(), where size() would be, call orientation() with the parameter as either PORTRAIT or LANDSCAPE.
In the "AndroidManifest.xml" file (go to Sketch > Show Sketch Folder, then select this file), change the property "android:screenOrientation" to be either "portrait" or "landscape". This is XML, and if you mess up the file, your application won't get pass the compilation, so be careful!

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Alter canvas

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