java如何在Android webview中禁用水平滚动

Question

我只想在我的webview中进行垂直滚动，不想进行任何水平滚动

webSettings.setLayoutAlgorithm(LayoutAlgorithm.SINGLE_COLUMN);

这帮助我解决了滚动问题

但是使用它使我的网络视图看起来很奇怪。所有编辑文本的高度（垂直）被压缩，看起来不好

• 有没有其他方法可以从客户端禁用水平滚动

• 使用单_列如何避免webview高度更改的问题？我希望垂直的外观和感觉与以前一样，没有单列

Answer 1

我刚试过这个，效果很好，我不知道是这么简单，只有一句话：

mWebView.getSettings().setLayoutAlgorithm(LayoutAlgorithm.SINGLE_COLUMN);

资料来源：http://sharecoding.wordpress.com/2012/02/16/programmatically-disable-scroll-function-on-android-webview/

Answer 2

我知道它晚了，但我希望它将帮助别人，请使用下面提到的类，以禁用水平滚动

public class CustomWebView extends WebView implements View.OnTouchListener {

    // the initial touch points x coordinate
    private float touchDownX;
    private OnScrollChangedCallback mOnScrollChangedCallback;

    public CustomWebView(final Context context) {
        super(context);

        // make vertically scrollable only
        makeVerticalScrollOnly();
    }

    public CustomWebView(final Context context, final AttributeSet attrs) {
        super(context, attrs);

        // make vertically scrollable only
        makeVerticalScrollOnly();
    }

    public CustomWebView(final Context context, final AttributeSet attrs, final int defStyle) {
        super(context, attrs, defStyle);

        // make vertically scrollable only
        makeVerticalScrollOnly();
    }

    @Override
    protected void onScrollChanged(final int l, final int t, final int oldl, final int oldt) {
        super.onScrollChanged(l, t, oldl, oldt);
        if (mOnScrollChangedCallback != null) mOnScrollChangedCallback.onScroll(l, t);
    }

    public OnScrollChangedCallback getOnScrollChangedCallback() {
        return mOnScrollChangedCallback;
    }

    public void setOnScrollChangedCallback(final OnScrollChangedCallback onScrollChangedCallback) {
        mOnScrollChangedCallback = onScrollChangedCallback;
    }

    /**
     * Impliment in the activity/fragment/view that you want to listen to the webview
     */
    public static interface OnScrollChangedCallback {
        public void onScroll(int l, int t);
    }

    /**
     * make this {@link WebView} vertically scroll only
     */
    private void makeVerticalScrollOnly() {
        // set onTouchListener for vertical scroll only
        setOnTouchListener(this);

        // hide horizontal scroll bar
        setHorizontalScrollBarEnabled(false);
    }

    @Override
    public boolean onTouch(View view, MotionEvent motionEvent) {

        // multitouch is ignored
        if (motionEvent.getPointerCount() > 1) {
            return true;
        }

        // handle x coordinate on single touch events
        switch (motionEvent.getAction()) {
            // save the x coordinate on touch down
            case MotionEvent.ACTION_DOWN:
                touchDownX = motionEvent.getX();
                break;

            // reset the x coordinate on each other touch action, so it doesn't move
            case MotionEvent.ACTION_MOVE:
            case MotionEvent.ACTION_CANCEL:
            case MotionEvent.ACTION_UP:
                motionEvent.setLocation(touchDownX, motionEvent.getY());
                break;

        }

        // let the super view handle the update
        return false;

    }
}

Answer 3

这是一次黑客攻击，但在过去对我来说是成功的。在垂直方向的滚动视图中环绕您的网络视图：

<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:scrollbars="vertical"    >
  <WebView
    android:id="@+id/mywebview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" />
</ScrollView>

然后禁用WebView中的所有滚动

要禁用WebView的滚动，可以使用以下代码：

 // disable scroll on touch
webview.setOnTouchListener(new View.OnTouchListener() {

    public boolean onTouch(View v, MotionEvent event) {
      return (event.getAction() == MotionEvent.ACTION_MOVE);
    }
});

Answer 4

以下是我如何仅为webview禁用水平滚动

webView.setHorizontalScrollBarEnabled(false);
webView.setOnTouchListener(new View.OnTouchListener() {
    float m_downX;
    public boolean onTouch(View v, MotionEvent event) {

        if (event.getPointerCount() > 1) {
            //Multi touch detected
            return true;
        }

        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN: {
                // save the x
                m_downX = event.getX();
                break;
            }
            case MotionEvent.ACTION_MOVE:
            case MotionEvent.ACTION_CANCEL:
            case MotionEvent.ACTION_UP: {
                // set x so that it doesn't move
                event.setLocation(m_downX, event.getY());
                break;
            }

        }
        return false;
    }
});

基本上拦截触摸事件，不允许x值改变。这允许webview垂直滚动，但不能水平滚动。如果你想要相反的结果，那就为y做吧

Answer 5

基于@vee answer的解决方案，但更方便：

public class WebViewTouchListener implements View.OnTouchListener {
    private float downX;

    @Override
    public boolean onTouch(final View v, final MotionEvent event) {
        if (event.getPointerCount() > 1) {
            //multi touch
            return true;
        }

        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                downX = event.getX();
                break;
            case MotionEvent.ACTION_MOVE:
            case MotionEvent.ACTION_CANCEL:
            case MotionEvent.ACTION_UP:
                // set x so that it doesn't move
                event.setLocation(downX, event.getY());
                break;
        }
        return false;
    }
}

只需将其与网络视图一起使用即可：

 webView.setHorizontalScrollBarEnabled(false);
 webView.setOnTouchListener(new WebViewTouchListener());

Answer 6

根据vee的答案，这里是一个仅垂直的WebView类。您可以将其用作xml中的视图元素，以保持代码的整洁

package com.yourpackage.views;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.webkit.WebView;

/**
 * custom {@link WebView} which only scrolls vertically but not horizontally
 */
public class VerticalScrollWebview extends WebView implements View.OnTouchListener {

    // the initial touch points x coordinate
    private float touchDownX;

    public VerticalScrollWebview(Context context) {
        super(context);

        // make vertically scrollable only
        makeVerticalScrollOnly();
    }

    public VerticalScrollWebview(Context context, AttributeSet attrs) {
        super(context, attrs);

        // make vertically scrollable only
        makeVerticalScrollOnly();
    }

    public VerticalScrollWebview(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        // make vertically scrollable only
        makeVerticalScrollOnly();
    }

    /**
     * make this {@link WebView} vertically scroll only
     */
    private void makeVerticalScrollOnly() {
        // set onTouchListener for vertical scroll only
        setOnTouchListener(this);

        // hide horizontal scroll bar
        setHorizontalScrollBarEnabled(false);
    }

    @Override
    public boolean onTouch(View view, MotionEvent motionEvent) {

        // multitouch is ignored
        if (motionEvent.getPointerCount() > 1) {
            return true;
        }

        // handle x coordinate on single touch events
        switch (motionEvent.getAction()) {
            // save the x coordinate on touch down
            case MotionEvent.ACTION_DOWN:
                touchDownX = motionEvent.getX();
                break;

            // reset the x coordinate on each other touch action, so it doesn't move
            case MotionEvent.ACTION_MOVE:
            case MotionEvent.ACTION_CANCEL:
            case MotionEvent.ACTION_UP:
                motionEvent.setLocation(touchDownX, motionEvent.getY());
                break;

        }

        // let the super view handle the update
        return false;

    }
}