Question

我有一个viewpager，每个页面都必须显示不同的WebView。这个WebView应该允许horizontall scrool，我想在滚动完成时滑动到下一页。

我已经搜索过，并找到了一些解决方案，但我没有解决这个问题。我有一个CustomViewPager和一个CustomWebView来尝试处理滚动事件。

这是我的代码：

自定义ViewPager

public class WebViewPager extends ViewPager {

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

    @Override
    protected boolean canScroll(View v, boolean checkV, int dx, int x, int y) {
        if (v instanceof ExtendedWebView) {
            return ((ExtendedWebView) v).canScrollHor(-dx);
        } else {
            return super.canScroll(v, checkV, dx, x, y);
        }
    }
}

自定义WebView

public class ExtendedWebView extends WebView {

    public ExtendedWebView(Context context) {
        super(context);
    }

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

    public boolean canScrollHor(int direction) {
        final int offset = computeHorizontalScrollOffset();
        final int range = computeHorizontalScrollRange() - computeHorizontalScrollExtent();
        if (range == 0)
            return false;
        if (direction < 0) {
            return offset > 0;
        } else {
            return offset < range - 1;
        }
    }   
}

ScreenSlidePagerActivity

public class ScreenSlidePagerActivity extends FragmentActivity {

    class MyPageAdapter extends FragmentPagerAdapter {
        private List<Fragment> fragments;
        private List<String> titles;

        public MyPageAdapter(FragmentManager fm) {
            super(fm);
            this.fragments = new ArrayList<Fragment>();
            this.titles = new ArrayList<String>();
        }

        public void addItem(String url, String title) {
            Fragment myFragment = new WebViewFragment();
            Bundle args = new Bundle();
            args.putString("url", url);
            myFragment.setArguments(args);
            this.fragments.add(myFragment);
            this.titles.add(title);
        }

        @Override
        public Fragment getItem(int position) {
            return this.fragments.get(position);
        }

        public CharSequence getPageTitle(int position) {
            return this.titles.get(position);
        }

        @Override
        public int getCount() {
            return this.fragments.size();
        }
    }

    private MyPageAdapter pageAdapter = null;
    private WebViewPager pager = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        pageAdapter = new MyPageAdapter(getSupportFragmentManager());
        pageAdapter.addItem("url1", "WebView 1");
        pageAdapter.addItem("url2", "WebView 2");
        pageAdapter.addItem("url3", "WebView 3");

        pager = (WebViewPager) findViewById(R.id.pager);

        pager.setOffscreenPageLimit(pageAdapter.getCount() - 1);
        pager.setAdapter(pageAdapter);
    }
}

活动布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="0dp"
    android:paddingLeft="0dp"
    android:paddingRight="0dp"
    android:paddingTop="0dp"
    tools:context=".MainActivity" >

    <com.example.viewpagerexample.WebViewPager
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingBottom="6dp"
        android:paddingTop="0dp" >

        <android.support.v4.view.PagerTabStrip
            android:id="@+id/pager_header"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="top"
            android:background="#fff"
            android:paddingBottom="0dp"
            android:paddingLeft="0dp"
            android:paddingRight="0dp"
            android:paddingTop="0dp"
            android:textColor="#000" />
    </com.example.viewpagerexample.WebViewPager>

</LinearLayout>

更新只有将此参数放在我的网页的CSS中时，接受的答案才有效：

display: table;

显然，如果没有此参数，WebView将无法计算其内容的宽度。

Answer 1

将以下属性设置为WebView

<your.package.name.MyWebView
  android:id="@+id/webview"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent" 
 />

    mWebView.setInitialScale(120);
    mWebView.setScrollContainer(true);
    mWebView.bringToFront();
    mWebView.setScrollbarFadingEnabled(true);
    mWebView.setVerticalScrollBarEnabled(true);
    mWebView.setHorizontalScrollBarEnabled(true);
    mWebView.getSettings().setBuiltInZoomControls(true);
    mWebView.getSettings().setJavaScriptEnabled(false);
    mWebView.getSettings().setUseWideViewPort(true);
    mWebView.getSettings().setUserAgentString("Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420+ (KHTML, like Gecko) Version/3.0 Mobile/1A543a Safari/419.3");

<强> 1。实现自定义ViewPager实例，如下所示：

import android.content.Context;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;

public class CustomViewPager extends ViewPager {

    private MagazineWebView_WithoutFlipWebView mCurrentPageWebView_; //custom webview

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

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {

        if (Constants.LOGGING) {
            Log.v(Constants.LOG_OEAMTC_APP, "CustomViewPager - onInterceptTouchEvent");
        }

        // if view zoomed out (view starts at 33.12... scale level) ... allow
        // zoom within webview, otherwise disallow (allow viewpager to change
        // view)
        if (mCurrentPageWebView_ != null && (mCurrentPageWebView_.getScale() * 100) > 34) {
            Log.v(Constants.LOG_OEAMTC_APP, "CustomViewPager - intrcepted: " + String.valueOf((mCurrentPageWebView_.getScale() * > 100)));
            this.requestDisallowInterceptTouchEvent(true);
        }
        else {
            if (mCurrentPageWebView_ != null) {
                Log.v(Constants.LOG_OEAMTC_APP,
                        "CustomViewPager - not intrcepted: " + String.valueOf(mCurrentPageWebView_.getScale() * 100));
            }
            this.requestDisallowInterceptTouchEvent(false);
        }

        return super.onInterceptTouchEvent(event);
    }

    public MagazineWebView_WithoutFlipWebView getCurrentPageWebView() {
        return mCurrentPageWebView_;
    }

    public void setCurrentPageWebView(MagazineWebView_WithoutFlipWebView currentPageWebView) {
        mCurrentPageWebView_ = currentPageWebView;
    }
}

<强> 2。在您的主（ViewPager）活动中，将以下行添加到视图寻呼机

mViewPager_ = new AwesomePagerAdapter();
        viewpapgerInLayout = (CustomViewPager) findViewById(R.id.awesomepager);
        viewpapgerInLayout.setAdapter(mViewPager_);
        viewpapgerInLayout.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageSelected(int position) {
                  viewpapgerInLayout.setCurrentPageWebView(mLstPagesWebviews_.get(position));
            }

            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });

第3。最后，运行它：=）如果缩放级别是初始缩放，允许更改页面，其他时间您可以浏览Web视图

另外，您也可以扩展WebView，但不能同时扩展

@Override
public boolean onInterceptTouchEvent(MotionEvent p_event)
{
    return true;
}

@Override
public boolean onTouchEvent(MotionEvent p_event)
{
    if (p_event.getAction() == MotionEvent.ACTION_MOVE && getParent() != null)
    {
        getParent().requestDisallowInterceptTouchEvent(true);
    }

    return super.onTouchEvent(p_event);
}

如何在ViewPager中水平滚动webview？

1 个答案: