虽然使用 onTouchEvent,但 ViewFlipper 中的 ScrollView 不起作用

发布于 2024-11-28 08:51:22 字数 2977 浏览 2 评论 0原文

在这篇文章中: Android:flipper中的ScrollView

建议为ScrollView设置一个onTouchnListener是 ViewFlipper 子级的一部分。

我这样做了,并且也使用了相同的逻辑:

    public class MainActivity extends Activity implements OnGestureListener {

// ...

@Override
protected void onCreate(Bundle savedInstanceState) {
    // ...

    this.gestureDetector = new GestureDetector(this);

    // ..

           createViews();
}


private void createViews() {

    LayoutInflater inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

            displayView = inflater.inflate(R.layout.viewflippercontent, null);

    ScrollView scrollView = (ScrollView) displayView
            .findViewById(R.id.scrollview);

    scrollView.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
             if (gestureDetector.onTouchEvent(event)) {
                Log.d("ScrollViewOnTouchListener", "true");                 
                return true;
            } else {
                Log.d("ScrollViewOnTouchListener", "false");
                return false;                       
            }
        }
    });

    // ..
}


@Override
public boolean onTouchEvent(MotionEvent me) {
    Log.d("onTouchEvent", "onTouchEvent");
    return gestureDetector.onTouchEvent(me);
}

public boolean onDown(MotionEvent e) {
    return true;
}

public void onLongPress(MotionEvent e) {
}

public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
        float distanceY) {
    Log.d("onScroll", "onScroll");
    return false;
}

public void onShowPress(MotionEvent e) {
}

public boolean onSingleTapUp(MotionEvent e) {
    return true;
}

}

当我在 ViewFlipper 的子级中滚动时,我在 LogCat 中得到以下内容:


08-07 21:57:14.581: DEBUG/ScrollViewOnTouchListener(4586): true

08-07 21: 57:14.591:调试/ScrollViewOnTouchListener(4586):假

08-07 21:57:14.622:调试/ ScrollViewOnTouchListener(4586):假

08-07 21:57:14.646:调试/ onScroll(4586):onScroll

08-07 21:57:14.646:调试/ ScrollViewOnTouchListener(4586):错误的

08-07 21:57:14.671:调试/ onScroll(4586):onScroll

08-07 21:57:14.671:调试/ ScrollViewOnTouchListener(4586):假

08-07 21:57:14.704:调试/ onScroll(4586):滚动时

08-07 21:57:14.704:调试/ ScrollViewOnTouchListener(4586):假

08-07 21:57:14.731:调试/ onScroll(4586):onScroll

08-07 21:57:14.731:调试/ ScrollViewOnTouchListener(4586):错误的

08-07 21:57:14.761:调试/ onScroll(4586):onScroll

08-07 21:57:14.761:调试/ ScrollViewOnTouchListener(4586):假

08-07 21:57:14.791:调试/ onScroll(4586):滚动时

08-07 21:57:14.791: DEBUG/ScrollViewOnTouchListener(4586): false

08-07 21:57:14.791: DEBUG/ScrollViewOnTouchListener(4586): true


但是没有发生滚动,尽管应该是可能的,因为内容大于屏幕。

我做错了什么?

In this post:
Android: ScrollView in flipper

It was suggested to set an onTouchnListener to the ScrollView which is part of a child of a ViewFlipper.

I did that and also used the same logic:

    public class MainActivity extends Activity implements OnGestureListener {

// ...

@Override
protected void onCreate(Bundle savedInstanceState) {
    // ...

    this.gestureDetector = new GestureDetector(this);

    // ..

           createViews();
}


private void createViews() {

    LayoutInflater inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

            displayView = inflater.inflate(R.layout.viewflippercontent, null);

    ScrollView scrollView = (ScrollView) displayView
            .findViewById(R.id.scrollview);

    scrollView.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
             if (gestureDetector.onTouchEvent(event)) {
                Log.d("ScrollViewOnTouchListener", "true");                 
                return true;
            } else {
                Log.d("ScrollViewOnTouchListener", "false");
                return false;                       
            }
        }
    });

    // ..
}


@Override
public boolean onTouchEvent(MotionEvent me) {
    Log.d("onTouchEvent", "onTouchEvent");
    return gestureDetector.onTouchEvent(me);
}

public boolean onDown(MotionEvent e) {
    return true;
}

public void onLongPress(MotionEvent e) {
}

public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
        float distanceY) {
    Log.d("onScroll", "onScroll");
    return false;
}

public void onShowPress(MotionEvent e) {
}

public boolean onSingleTapUp(MotionEvent e) {
    return true;
}

}

When I scroll in the child of the ViewFlipper I get the following in the LogCat:


08-07 21:57:14.581: DEBUG/ScrollViewOnTouchListener(4586): true

08-07 21:57:14.591: DEBUG/ScrollViewOnTouchListener(4586): false

08-07 21:57:14.622: DEBUG/ScrollViewOnTouchListener(4586): false

08-07 21:57:14.646: DEBUG/onScroll(4586): onScroll

08-07 21:57:14.646: DEBUG/ScrollViewOnTouchListener(4586): false

08-07 21:57:14.671: DEBUG/onScroll(4586): onScroll

08-07 21:57:14.671: DEBUG/ScrollViewOnTouchListener(4586): false

08-07 21:57:14.704: DEBUG/onScroll(4586): onScroll

08-07 21:57:14.704: DEBUG/ScrollViewOnTouchListener(4586): false

08-07 21:57:14.731: DEBUG/onScroll(4586): onScroll

08-07 21:57:14.731: DEBUG/ScrollViewOnTouchListener(4586): false

08-07 21:57:14.761: DEBUG/onScroll(4586): onScroll

08-07 21:57:14.761: DEBUG/ScrollViewOnTouchListener(4586): false

08-07 21:57:14.791: DEBUG/onScroll(4586): onScroll

08-07 21:57:14.791: DEBUG/ScrollViewOnTouchListener(4586): false

08-07 21:57:14.791: DEBUG/ScrollViewOnTouchListener(4586): true


However no scrolling takes place although it should be possible since the content is bigger than the screen.

What am I doing wrong?

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评论(2

花之痕靓丽 2024-12-05 08:51:22

我认为您的问题与这篇文章中发现的问题类似:当滚动时间太短而无法滚动时,Scrollview 不会滑动

看一下建议的解决方案,即作者扩展 ScrollView 视图类的解决方案。我相信这会解决你的问题

I think you're problem is similar to one found in this post:Scrollview doesn't swipe when it's too short to scroll

take a look at the proposed solution, the one where the author extended the ScrollView view class. i believe this will fix your pro

揽清风入怀 2024-12-05 08:51:22

在此链接找到解决方案 -> 在RelativeLayout中使用ScrollView的片段> ontouch 不起作用

将以下代码添加到滚动视图内的视图中

android:clickable="true"
    android:focusable="true"
    android:focusableInTouchMode="true"

Found a solution at this link -> Fragment using ScrollView inside RelativeLayout > ontouch doesn't work

Add the following code to your view inside scrollview

android:clickable="true"
    android:focusable="true"
    android:focusableInTouchMode="true"
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