网格布局上的翻转手势检测

问题：

I want to get fling gesture detection working in my Android application. 我想fling手势检测工作在我的Android应用程序。

What I have is a GridLayout that contains 9 ImageView s. 我所拥有的是一个GridLayout ，其中包含9个ImageView 。 The source can be found here: Romain Guys's Grid Layout . 可以在这里找到源： Romain Guys的Grid Layout 。

That file I take is from Romain Guy's Photostream application and has only been slightly adapted. 我带的那个文件来自Romain Guy的Photostream应用程序，只是稍作修改。

For the simple click situation I need only set the onClickListener for each ImageView I add to be the main activity which implements View.OnClickListener . 对于简单的点击情况我只需要设置onClickListener每个ImageView我添加是主要的activity ，它实现View.OnClickListener 。 It seems infinitely more complicated to implement something that recognizes a fling . 实现识别出fling东西似乎无限复杂。 I presume this is because it may span views ? 我认为这是因为它可能跨越views ？

If my activity implements OnGestureListener I don't know how to set that as the gesture listener for the Grid or the Image views that I add. 如果我的活动实现了OnGestureListener我将不知道如何将其设置为我添加的Grid或Image视图的手势侦听器。
```
public class SelectFilterActivity extends Activity implements View.OnClickListener, OnGestureListener { ...
```
If my activity implements OnTouchListener then I have no onFling method to override (it has two events as parameters allowing me to determine if the fling was noteworthy). 如果我的活动实现了OnTouchListener那么我就没有要override onFling方法（它有两个事件作为参数，使我可以确定onFling是否值得关注）。
```
public class SelectFilterActivity extends Activity implements View.OnClickListener, OnTouchListener { ...
```
If I make a custom View , like GestureImageView that extends ImageView I don't know how to tell the activity that a fling has occurred from the view. 如果我做一个自定义的View ，如GestureImageView扩展ImageView ，我不知道怎么跟一个活动fling已经从视图中发生。 In any case, I tried this and the methods weren't called when I touched the screen. 无论如何，我都尝试过这种方法，并且触摸屏幕时不会调用这些方法。

I really just need a concrete example of this working across views. 我真的只需要一个跨视图工作的具体示例。 What, when and how should I attach this listener ? 什么，何时以及如何附加此listener ？ I need to be able to detect single clicks also. 我还需要能够检测到单击。

// Gesture detection
mGestureDetector = new GestureDetector(this, new GestureDetector.SimpleOnGestureListener() {

    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        int dx = (int) (e2.getX() - e1.getX());
        // don't accept the fling if it's too short
        // as it may conflict with a button push
        if (Math.abs(dx) > MAJOR_MOVE && Math.abs(velocityX) > Math.absvelocityY)) {
            if (velocityX > 0) {
                moveRight();
            } else {
                moveLeft();
            }
            return true;
        } else {
            return false;
        }
    }
});

Is it possible to lay a transparent view over the top of my screen to capture flings? 是否可以在屏幕上方放置透明视图以捕获抓拍？

If I choose not to inflate my child image views from XML can I pass the GestureDetector as a constructor parameter to a new subclass of ImageView that I create? 如果我选择不inflate从XML我的孩子形象的意见我可以传递GestureDetector作为构造函数参数的一个新的子类ImageView ，我创造？

This is the very simple activity that I'm trying to get the fling detection to work for: SelectFilterActivity (Adapted from photostream) . 这是一个非常简单的活动，我正在尝试使fling检测起作用： SelectFilterActivity（从photostream改编而成）。

I've been looking at these sources: 我一直在寻找这些来源：

Detect Gestures - Tutorial 检测手势-教程
SDK docs SDK文档
Calculator Code 计算器代码

Nothing has worked for me so far and I was hoping for some pointers. 到目前为止，对我来说什么都没有奏效，我一直希望有一些指点。

解决方案：

参考一： https://stackoom.com/question/3vpx/网格布局上的翻转手势检测
参考二： https://oldbug.net/q/3vpx/Fling-gesture-detection-on-grid-layout

来源：oschina

链接：https://my.oschina.net/u/4432649/blog/4312689

标签

android

photostream

java