Question

android 缩放手势怎么测试

Answer 1

@Override
public boolean onTouch(View v, MotionEvent event)
{
mScaleGestureDetector.onTouchEvent(event);

float x = 0, y = 0;
// 拿到触摸点的个数
final int pointerCount = event.getPointerCount();
// 得到多个触摸点的x与y均值
for (int i = 0; i < pointerCount; i++)
{
x += event.getX(i);
y += event.getY(i);
}
x = x / pointerCount;
y = y / pointerCount;

/**
* 每当触摸点发生变化时，重置mLasX , mLastY
*/
if (pointerCount != lastPointerCount)
{
isCanDrag = false;
mLastX = x;
mLastY = y;
}

Answer 2

相册食指拇指放大