更新时间:2023-02-27 08:33:58
使用 GestureDetector 使用自定义Web视图。
Use a GestureDetector with a custom web view..
webView.setGestureDetector(new GestureDetector(new CustomeGestureDetector()));
手势检测:
private class CustomeGestureDetector extends SimpleOnGestureListener {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
if(e1 == null || e2 == null) return false;
if(e1.getPointerCount() > 1 || e2.getPointerCount() > 1) return false;
else {
try { // right to left swipe .. go to next page
if(e1.getX() - e2.getX() > 100 && Math.abs(velocityX) > 800) {
//do your stuff
return true;
} //left to right swipe .. go to prev page
else if (e2.getX() - e1.getX() > 100 && Math.abs(velocityX) > 800) {
//do your stuff
return true;
} //bottom to top, go to next document
else if(e1.getY() - e2.getY() > 100 && Math.abs(velocityY) > 800
&& webView.getScrollY() >= webView.getScale() * (webView.getContentHeight() - webView.getHeight())) {
//do your stuff
return true;
} //top to bottom, go to prev document
else if (e2.getY() - e1.getY() > 100 && Math.abs(velocityY) > 800 ) {
//do your stuff
return true;
}
} catch (Exception e) { // nothing
}
return false;
}
}
}
自定义Web视图:
public final class CustomWebView extends WebView {
private GestureDetector gestureDetector;
/**
* @param context
* @param attrs
* @param defStyle
*/
public CustomWebView(Context context) {
super(context);
}
/**
* @param context
* @param attrs
* @param defStyle
*/
public CustomWebView(Context context, AttributeSet attrs) {
super(context, attrs);
}
/**
* @param context
* @param attrs
* @param defStyle
*/
public CustomWebView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
/*
* @see android.webkit.WebView#onScrollChanged(int, int, int, int)
*/
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
super.onScrollChanged(l, t, oldl, oldt);
}
/*
* @see android.webkit.WebView#onTouchEvent(android.view.MotionEvent)
*/
@Override
public boolean onTouchEvent(MotionEvent ev) {
return gestureDetector.onTouchEvent(ev) || super.onTouchEvent(ev);
}
public void setGestureDetector(GestureDetector gestureDetector) {
this.gestureDetector = gestureDetector;
}
}
正如所说由АндрейМосквичёв:
As said by Андрей Москвичёв:
可以毫不派生的WebView类来解决,通过注册触摸监听器: webview.setOnTouchListener(新OnTouchListener()...)
并调用 gestureDetector.onTouchEvent(EV)
从它。
It can be solved without deriving WebView class, by registering touch listener: webview.setOnTouchListener(new OnTouchListener() ...)
and calling gestureDetector.onTouchEvent(ev)
from it.