안드로이드 - 멀티터치 예제

public class MultiTouchTest extends Activity implements OnTouchListener{

StringBuilder b = new StringBuilder();

TextView textView;

float[] x = new float[10];

float[] y = new float[10];

boolean[] touched = new boolean[10];

@Override

public void onCreate(Bundle savedInstanceState) {

   super.onCreate(savedInstanceState);

   textView = new TextView(this);

   textView.setText("터치 또는 드레그를 하세요(멀티 터치 가능");

   textView.setOnTouchListener(this);

   setContentView(textView);

}

@Override

public boolean onTouch(View v, MotionEvent event) {

int action = event.getAction() & MotionEvent.ACTION_MASK;

int pointerIndex = (event.getAction() & MotionEvent.ACTION_POINTER_ID_MASK) >> MotionEvent.ACTION_POINTER_ID_SHIFT;

int pointerId = event.getPointerId(pointerIndex);

switch(action){

case MotionEvent.ACTION_DOWN:

case MotionEvent.ACTION_POINTER_DOWN:

touched[pointerId]=true;

x[pointerId] = (int)event.getX(pointerIndex);

y[pointerId] = (int)event.getY(pointerIndex);

break;

case MotionEvent.ACTION_POINTER_UP:

case MotionEvent.ACTION_UP:

case MotionEvent.ACTION_CANCEL:

touched[pointerId]=false;

x[pointerId] = (int)event.getX(pointerIndex);

y[pointerId] = (int)event.getY(pointerIndex);

break;

case MotionEvent.ACTION_MOVE:

int pointerCount = event.getPointerCount();

for(int i=0; i < pointerCount; i++){

pointerIndex = i;

pointerId = event.getPointerId(pointerIndex);

x[pointerId] = (int)event.getX(pointerIndex);

y[pointerId] = (int)event.getY(pointerIndex);

}

break;

}

updateTextView();

return true;

}

private void updateTextView(){

b.setLength(0);

for(int i=0; i < 10; i++){

b.append(touched[i]);

b.append(", ");

b.append(x[i]);

b.append(", ");

b.append(y[i]);

b.append("\n");

}

textView.setText(b.toString());

}

}

추가 정보
[번역] 안드로이드에서 멀티터치 활용하기 (Making Sense of Multitouch)
 http://www.androidside.com/skin/board/mw.basic/mw.proc/mw.print.php?bo_table=B46&wr_id=11860