安卓：后才会onLongClick如何调用onTouch？ [英] Android: How to call onTouch only after an onLongClick?

问题描述

我有一个形象，它可以左右移动和缩放捏的手势......所有这一切都在 onTouch做（）。我想限制这一点，并使其移动（和可扩展性）只有在用户方面做的图像上的longclick。如何做到这一点？

I have an image, which can be moved around and scaled with pinch gesture.. All this is done inside onTouch(). I want to restrict this and make it movable(and scalable) only after the user has done a longclick on the image.. How do I do this?

推荐答案

注册一个的 LongCLickListener 。如果长按是公认设置一个标志，真正的。

Register a LongCLickListener. If a long click is recognized set a flag to true.

在OnTouch方法允许缩放和移动仅当该标志被设置为true。之后，在移动和缩放再次设置标志设置为false。

In the OnTouch method allow scaling and moving only if the flag is set to true. After the moving and scaling set the flag to false again.

下面是一些伪code：

Here is some pseudocode:

public class MyActivity extends Activity {

   private boolean longClick = false;

   public boolean onTouch(View v, MotionEvent event) {
      if (longClick) {
         // do scaling and moving ...
         longClick = false;
      }
      return false;
   }

   public boolean onLongClick(View v) {
      longClick = true;
      return false;
   }
}

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