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내 응용 프로그램에서 멀티 터치로 드래그 앤 드롭을 구현하는 방법을 찾고 있습니다. 많은 뷰가 있는데 첫 번째 사용자가 두 번째 사용자가 다른 뷰를 드래그하는 것과 같은 시간에 뷰를 드래그하도록하고 싶습니다.Android에서 멀티 터치로 끌어서 놓기 구현
내 단일 터치 끌어서 놓기가 잘 작동합니다. 내보기에서이 수신기를 구현하고 있습니다. onDragStart는 터치 한 지점을 기록하고 onDragContinuing은보기의 위치를 변경하고 위치가 유효한지 확인합니다. :
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
return onDragStart(event.getX(), event.getY());
}
else if (event.getAction() == MotionEvent.ACTION_MOVE){
return onDragContinuing(event.getRawX(), event.getRawY());
}
else if (event.getAction() == MotionEvent.ACTION_UP){
return onDrop(event.getRawX(), event.getRawY());
}
else{
return false;
}
}
그 같은 멀티 터치를 구현하기 위해 노력했다,하지만하지 작업을 수행합니다
잘못 무엇private static final int INVALID_POINTER_ID = -1;
// The ‘active pointer’ is the one currently moving our object.
private int mActivePointerId = INVALID_POINTER_ID;
public boolean onTouch(View v, MotionEvent event) {
int action = event.getAction();
int actionCode = action & MotionEvent.ACTION_MASK;
switch(actionCode){
case MotionEvent.ACTION_DOWN :{
Toast.makeText(getContext(), "down", Toast.LENGTH_SHORT).show();
// Save the ID of this pointer
mActivePointerId = event.getPointerId(0);
return onDragStart(event.getX(), event.getY());
}
case MotionEvent.ACTION_POINTER_DOWN :{
Toast.makeText(getContext(), "pointer down", Toast.LENGTH_SHORT).show();
// Save the ID of this pointer
// Extract the index of the pointer that left the touch sensor
final int pointerIndex = (action & MotionEvent.ACTION_POINTER_ID_MASK) >> MotionEvent.ACTION_POINTER_ID_SHIFT;
mActivePointerId = event.getPointerId(pointerIndex);
return onDragStart(event.getX(mActivePointerId), event.getY(mActivePointerId));
}
case MotionEvent.ACTION_MOVE :{
Toast.makeText(getContext(), "move", Toast.LENGTH_SHORT).show();
final int pointerIndex = (action & MotionEvent.ACTION_POINTER_ID_MASK) >> MotionEvent.ACTION_POINTER_ID_SHIFT;
final int mCurrentPointerId = event.getPointerId(pointerIndex);
if (mActivePointerId == mCurrentPointerId){
return onDragContinuing(getRawX(event, mActivePointerId), getRawY(event, mActivePointerId));
}
else return false;
}
case MotionEvent.ACTION_UP :{
Toast.makeText(getContext(), "up", Toast.LENGTH_SHORT).show();
final int pointerIndex = (action & MotionEvent.ACTION_POINTER_ID_MASK) >> MotionEvent.ACTION_POINTER_ID_SHIFT;
final int mCurrentPointerId = event.getPointerId(pointerIndex);
if (mActivePointerId == mCurrentPointerId){
return onDrop(event.getRawX(), event.getRawY());
}
else return false;
}
case MotionEvent.ACTION_POINTER_UP :{
Toast.makeText(getContext(), "pointer up", Toast.LENGTH_SHORT).show();
final int pointerIndex = (action & MotionEvent.ACTION_POINTER_ID_MASK) >> MotionEvent.ACTION_POINTER_ID_SHIFT;
final int mCurrentPointerId = event.getPointerId(pointerIndex);
if (mActivePointerId == mCurrentPointerId){
return onDrop(getRawX(event, pointerIndex), getRawY(event, pointerIndex));
}
else return false;
}
default :{
return false;
}
}
}
/**
* MotionEvent has no getRawX(int) method; simulate it pending future API approval.
*/
private static float getRawX(MotionEvent event, int pointerIndex) {
float offset = event.getX() - event.getRawX();
return event.getX(pointerIndex) + offset;
}
/**
* MotionEvent has no getRawY(int) method; simulate it pending future API approval.
*/
private static float getRawY(MotionEvent event, int pointerIndex) {
float offset = event.getY() - event.getRawY();
return event.getY(pointerIndex) + offset;
}
를? 너 나 좀 도와 줄 수있어? 감사합니다 !