Difference between revisions of "Android Controller"

Revision as of 21:48, 4 June 2011

Android Controller

Jeanne Wang

Objective

Create an intuitive and novel approach to a tablet based multi-touch and sensor-enabled controller for a real-time 3D visualization on a 2D platform. Using camera pose information relative to a 3D model displayed on a screen, we can display virtual camera shots in the 3D model space on the tablet.

Android Basics:

• Sandboxed in a linux environment, each application is actually a user

• Model View Controller setup
  • Model - Content providers
  • View - XML
  • Controller - Activity, or Service

• UI Components
  • Buttons

Button button = (Button)findViewById(R.id.button1);
button.setOnClickListener(buttonOnClick);

• • Sliders

SeekBar seekbar=(SeekBar)findViewById(R.id.seekBar1);
seekbar.setOnSeekBarChangeListener(sbar);

• • TextView

TextView seekbartxt=(TextView)findViewById(R.id.seekBarText);
			CharSequence t="slider progress:"+progress;
			seekbartxt.setText(t);

• • Toasts (timed popups)

                    int duration = Toast.LENGTH_SHORT;
                    View v;
		    CharSequence text = "button "+v.getId()+" pressed";
		    Toast t=Toast.makeText(v.getContext(),text, duration);
		    t.show();

• Listeners
  • OnClickListener

private OnClickListener showCamera = new OnClickListener() {
	    public void onClick(View v) {
		    	//do stuff here
            }

• • OnSeekBarChangeListener

private SeekBar.OnSeekBarChangeListener sbar = new SeekBar.OnSeekBarChangeListener()
	{
		
		public void onStopTrackingTouch(SeekBar seekBar) {			
		}
		
		public void onStartTrackingTouch(SeekBar seekBar) {
		}
		
		public void onProgressChanged(SeekBar seekBar, int progress,
				boolean fromUser) {
		}
	};

• Start New Intent

Intent myIntent = new Intent(v.getContext(), TouchScreen.class);
		    startActivityForResult(myIntent, 0);

• Camera

Hardware + Emulator

• using-adp1-without-sim-card
• register g1
• update g1 firmware

Network

• server

• client

• socket issues

ARToolkit

• detect marker
• pose

Android

OpenCover

• display marker
• display dataset

Tips

• Tip: An easy way to add import packages to your project is to press Ctrl-Shift-O (Cmd-Shift-O, on Mac). This is an Eclipse shortcut that identifies missing packages based on your code and adds them for you.
• To get cpuinfo on a particular machine look in: /proc/cpuinfo
• To get ipaddress on a particular machine call /sbin/ifconfig

Other possibilities

• Corona Sdk [[1]]
• HTML5 DeviceMotionEvent [[2]]
• PhoneGap [[3]]