问题描述

在 libGdx(在 Android 中)中是否有类似 touchdown 事件的等价物 - 所以当用户触摸屏幕(并连续按住手指)时，即touchhelddown 方法?

Is there an equivalent in libGdx (in Android) like the touchdown event - so when a user touches the screen (and holds their finger down continuously),i.e. touchhelddown method?

推荐答案

你可以使用GestureDetector.它实现了 InputAdapter，因此您可以使用它来代替 InputAdapter 或使用 InputMultiplexer 与 InputAdapter 一起使用.

You can use GestureDetector. It implements InputAdapter so you can use it instead of your InputAdapter or along with your InputAdapter using InputMultiplexer.

您需要为其提供一个GestureListener.GestureDetector 在检测到支持的手势时调用 GestureListener 的方法.这些方法和手势是:

You need to provide a GestureListener to it. GestureDetector calls GestureListener's methods when it detects supported gestures. These methods and gestures are:

public boolean touchDown (int x, int y, int pointer);
public boolean tap (int x, int y, int count);
public boolean longPress (int x, int y);
public boolean fling (float velocityX, float velocityY);
public boolean pan (int x, int y, int deltaX, int deltaY);
public boolean zoom (float originalDistance, float currentDistance);
public boolean pinch (Vector2 initialFirstPointer, Vector2 initialSecondPointer, 
                      Vector2 firstPointer, Vector2 secondPointer);

您可以扩展 GestureAdapter 并覆盖您感兴趣的方法.在您的情况下，您将覆盖 longPress 方法.您还可以提供 longPressDuration 作为构造函数的参数.

You can extend GestureAdapter and override the method you are interested in. In your case you will override longPress method. You can also provide longPressDuration as a parameter to constructor.

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