Android中WebView用來加載html頁面，自帶滑動效果。ScrollView同樣也是自帶滑動效果，在項目中如果需要WebView和一些其他view比如TextView一起滑動的話就必須外面嵌套一層ScrollView，這時問題就來了，嵌套之後ScrollView的滑動和WebView的滑動就會有衝突，WebView的滑動不流暢。下面就是解決方案：
第一種方法：我們都知道ScrollView和WebView都有滾動的效果，所以我們需要先屏蔽WebView的滾動事件。<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:descendantFocusability="blocksDescendants" >這時候如果後端如果傳過來的不是完整的Html，而是隻有body部分的內容，那麼我們就需要補充並添加一些css樣式來達到自適應的效果。
private String getHtmlData(String bodyHTML) {
String head = "<head>" +
"<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0, user-scalable=no\"> " +
"<style>img{max-width: 100%; width:auto; height:auto;}</style>" +
"</head>";
return "<html>" + head + "<body>" + bodyHTML + "</body></html>";
}4.0以後引用：
Webview.loadDataWithBaseURL("example-app://example.co.uk/", getHtmlData(String bodyHTML), null, "UTF-8",null);第二種方法：自定義一個ScrollView
import android.content.Context;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ScrollView;
/**
* Created by Administrator on 2015/12/29 0029.
*/
public class MyScrollView extends ScrollView {
// private GestureDetector mGestureDetector;
// View.OnTouchListener mGestureListener;
//
// public MyScrollView(Context context, AttributeSet attrs) {
// super(context, attrs);
// mGestureDetector = new GestureDetector(context, new YScrollDetector());
// setFadingEdgeLength(0);
// }
//
// @Override
// public boolean onInterceptTouchEvent(MotionEvent ev) {
// return super.onInterceptTouchEvent(ev) && mGestureDetector.onTouchEvent(ev);
// }
//
// // Return false if we're scrolling in the x direction
// class YScrollDetector extends GestureDetector.SimpleOnGestureListener {
// @Override
// public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
// if (Math.abs(distanceY) > Math.abs(distanceX)) {
// return true;
// }
// return false;
// }
// }
/**
*/
public ScrollView parentScrollView;
public MyScrollView(Context context, AttributeSet attrs) {
super(context, attrs);
}
private int lastScrollDelta = 0;
public void resume() {
overScrollBy(0, -lastScrollDelta, 0, getScrollY(), 0, getScrollRange(), 0, 0, true);
lastScrollDelta = 0;
}
int mTop = 10;
/**
* 將targetView滾到最頂端
*/
public void scrollTo(View targetView) {
int oldScrollY = getScrollY();
int top = targetView.getTop() - mTop;
int delatY = top - oldScrollY;
lastScrollDelta = delatY;
overScrollBy(0, delatY, 0, getScrollY(), 0, getScrollRange(), 0, 0, true);
}
private int getScrollRange() {
int scrollRange = 0;
if (getChildCount() > 0) {
View child = getChildAt(0);
scrollRange = Math.max(0, child.getHeight() - (getHeight()));
}
return scrollRange;
}
int currentY;
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
if (parentScrollView == null) {
return super.onInterceptTouchEvent(ev);
} else {
if (ev.getAction() == MotionEvent.ACTION_DOWN) {
// 將父scrollview的滾動事件攔截
currentY = (int)ev.getY();
setParentScrollAble(false);
return super.onInterceptTouchEvent(ev);
} else if (ev.getAction() == MotionEvent.ACTION_UP) {
// 把滾動事件恢復給父Scrollview
setParentScrollAble(true);
} else if (ev.getAction() == MotionEvent.ACTION_MOVE) {
}
}
return super.onInterceptTouchEvent(ev);
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
View child = getChildAt(0);
if (parentScrollView != null) {
if (ev.getAction() == MotionEvent.ACTION_MOVE) {
int height = child.getMeasuredHeight();
height = height - getMeasuredHeight();
// System.out.println("height=" + height);
int scrollY = getScrollY();
// System.out.println("scrollY" + scrollY);
int y = (int)ev.getY();
// 手指向下滑動
if (currentY < y) {
if (scrollY <= 0) {
// 如果向下滑動到頭，就把滾動交給父Scrollview
setParentScrollAble(true);
return false;
} else {
setParentScrollAble(false);
}
} else if (currentY > y) {
if (scrollY >= height) {
// 如果向上滑動到頭，就把滾動交給父Scrollview
setParentScrollAble(true);
return false;
} else {
setParentScrollAble(false);
}
}
currentY = y;
}
}
return super.onTouchEvent(ev);
}
/**
* 是否把滾動事件交給父scrollview
*
* @param flag
*/
private void setParentScrollAble(boolean flag) {
parentScrollView.requestDisallowInterceptTouchEvent(!flag);
}
}
<com.boohee.widgets.MyScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/main_bg"
android:layout_marginTop="@dimen/default_shadow_margin" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="180dp" >
<android.support.v4.view.ViewPager
android:id="@+id/vp_top_show"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
<LinearLayout
android:id="@+id/dot_layout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:gravity="center_horizontal"
android:orientation="horizontal"
android:padding="10dp" >
</LinearLayout>
</RelativeLayout>
<WebView
android:id="@+id/wv_show"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layerType="software"
android:scrollbars="none" />
</LinearLayout>
</com.boohee.widgets.MyScrollView>
android:layerType="software"webview常見問題彙總http://blog.csdn.net/t12x3456/article/details/13769731