Android WebView使用setWideViewPort,禁用双击缩放但保持捏缩放？

Question

我正在使用此代码,它完全按照我的意愿工作.但是我必须在双击时实现另一个功能,并且想要禁用双击缩放(但保持缩放缩放功能).

webView.getSettings().setLoadWithOverviewMode(true);
webView.getSettings().setUseWideViewPort(true);
webView.getSettings().setLayoutAlgorithm(LayoutAlgorithm.NORMAL);
webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setSupportZoom(true); 
webView.setInitialScale(1);

试图手动计算比例,没有运气(这感觉很复杂). 在Webview上禁用双击缩放/取消缩放

Android Webview - 网页应该适合设备屏幕

有没有办法使用setUseWideViewPort和Zoomcontrolls但只禁用或覆盖双击缩放？

Answer 1

最好的解决方案,只需从MyWebView扩展您的WebView

 public class HelpWebView extends WebView {

    private GestureDetector gestureDetector;
    private AtomicBoolean mPreventAction = new AtomicBoolean(false);
    private AtomicLong mPreventActionTime = new AtomicLong(0);

    public HelpWebView(Context context) {
        super(context);
        gestureDetector = new GestureDetector(context, new GestureListener());
    }

    public HelpWebView(Context context, AttributeSet attrs) {
        super(context, attrs);
        gestureDetector = new GestureDetector(context, new GestureListener());
    }

    public HelpWebView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        gestureDetector = new GestureDetector(context, new GestureListener());
    }

    public HelpWebView(Context context, AttributeSet attrs, int defStyle, boolean privateBrowsing) {
        super(context, attrs, defStyle, privateBrowsing);
        gestureDetector = new GestureDetector(context, new GestureListener());
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        int index = (event.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK) >> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
        int pointId = event.getPointerId(index);

        // just use one(first) finger, prevent double tap with two and more fingers
        if (pointId == 0){
            gestureDetector.onTouchEvent(event);

            if (mPreventAction.get()){
                if (System.currentTimeMillis() - mPreventActionTime.get() > ViewConfiguration.getDoubleTapTimeout()){
                    mPreventAction.set(false);
                } else {
                    return true;
                }
            }

            return super.onTouchEvent(event);
        } else {
            return true;
        }
    }

    private class GestureListener extends GestureDetector.SimpleOnGestureListener {
        @Override
        public boolean onDoubleTap(MotionEvent e) {
            mPreventAction.set(true);
            mPreventActionTime.set(System.currentTimeMillis());
            return true;
        }
        @Override
        public boolean onDoubleTapEvent(MotionEvent e) {
            mPreventAction.set(true);
            mPreventActionTime.set(System.currentTimeMillis());
            return true;
        }
    }
}