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在下面的代碼中,我正在測試多點觸控。當第一根手指觸摸屏幕時,我得到該手指的ID,如果我還用另一個手指觸摸屏幕,我也會得到該ID。但是當我移動手指時,我只能得到ID 0,沒有ID 1,第二根手指!我需要稍後將ID傳遞給一個存儲X和Y座標的方法,並且我需要知道在屏幕上繪製哪個ID。如何獲取移動手指的ID
我該如何獲得運動的正確ID?
@Override
public boolean onTouch(View v, MotionEvent event) {
synchronized (gameLoop) {
for (int i = 0; i < event.getPointerCount() && i < 2; i++) {
id = event.getPointerCount();
// Check if finger touch screen
if(event.getActionIndex() == i && (event.getActionMasked() == MotionEvent.ACTION_POINTER_DOWN || event.getActionMasked() == MotionEvent.ACTION_DOWN)) {
int j = event.getPointerCount();
int id = event.getPointerId(i);
String numDown = Integer.toString(j);
String sId = Integer.toString(id);
Log.i("Test", "Number DOWN: " + numDown + " ID: " + sId);
}
// Check if finger moves on screen
if(event.getActionIndex() == i && (event.getActionMasked() == MotionEvent.ACTION_MOVE)) {
int id = event.getPointerId(i);
String sId = Integer.toString(id);
Log.i("Test", " Moving ID: " + sId);
}
// Check if finger leave screen
if(event.getActionIndex() == i && (event.getActionMasked() == MotionEvent.ACTION_POINTER_UP || event.getActionMasked() == MotionEvent.ACTION_UP)) {
int k = event.getPointerCount();
int id = event.getPointerId(i);
String numUp = Integer.toString(k);
String sId = Integer.toString(id);
Log.i("Test", "Number UP: " + numUp + " ID: " + sId);
}
}
}
return true;
}