ViewPager, ScrollView, ListView等内嵌webview解决方案

在ViewPager, ScrollView, ListView等容器控件中内嵌了webview，特别是webview的大小固定的情况下，会出现滑动的冲突，可以采用如下自定义的webview来完美解决。
当webview滑动到边界到时候，ViewPager，ListView或ScrollView才可以滚动

package com.leo.demo;

import android.content.Context;
import android.os.Build;
import android.support.v4.view.MotionEventCompat;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class NestWebView extends WebView {

    // 是否垂直滚动
    boolean isScrollV;

    // 是否水平滚动
    // boolean isScrollH;

    public NestWebView(Context context) {
        super(context);
        init();
    }

    public NestWebView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public NestWebView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        WebSettings settings = getSettings();
        settings.setJavaScriptEnabled(true);
        settings.setDomStorageEnabled(true);
        settings.setDatabaseEnabled(true);

        settings.setPluginState(WebSettings.PluginState.ON_DEMAND);
        settings.setRenderPriority(WebSettings.RenderPriority.HIGH);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            settings.setMixedContentMode(WebSettings.MIXED_CONTENT_COMPATIBILITY_MODE);
        }

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            settings.setMediaPlaybackRequiresUserGesture(false);
        }

        settings.setJavaScriptCanOpenWindowsAutomatically(true);
        settings.setSupportMultipleWindows(false);
        setWebChromeClient(new WebChromeClient());
        setWebViewClient(new WebViewClient() {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                view.loadUrl(url);
                return true;
            }
        });
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (MotionEventCompat.getPointerCount(event) == 1) {
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    isScrollV = false;
                    //isScrollH = false;

                    //事件由webview处理
                    getParent().getParent().requestDisallowInterceptTouchEvent(true);
                    break;
                case MotionEvent.ACTION_MOVE:
                    // 垂直viewpager，scrollview，listview等
                    getParent().getParent().requestDisallowInterceptTouchEvent(!isScrollV);

                    //嵌套Viewpager时
                    // getParent().getParent().requestDisallowInterceptTouchEvent(!isScrollH);
                    break;
                default:
                    getParent().getParent().requestDisallowInterceptTouchEvent(false);
            }
        } else {
            //使webview可以双指缩放（前提是webview必须开启缩放功能，并且加载的网页也支持缩放）
            getParent().getParent().requestDisallowInterceptTouchEvent(true);
        }
        return super.onTouchEvent(event);
    }

    //当webview滚动到边界时执行
    @Override
    protected void onOverScrolled(int scrollX, int scrollY, boolean clampedX, boolean clampedY) {
        super.onOverScrolled(scrollX, scrollY, clampedX, clampedY);
        isScrollV = clampedY;
        //isScrollH = clampedX;
    }

}