解决ScrollView+ViewPager+ListView/RecyclerView，及ScrollVIew滑动监听

有一个需求是这样，在ScrollView下有一个Viewpager,ViewPager中又会有ListView或者RecyclerView,要整体滑动，同时监听ScrollView的滑动。

可以监听滑动的ScrollView：

public class ObservableScrollView extends ScrollView {
public interface OnScrollViewListener {
void onScrollChanged(int x, int y, int oldx, int oldy);
}
private OnScrollViewListener onScrollViewListener = null;

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

public ObservableScrollView(Context context, AttributeSet attrs,
int defStyle) {
super(context, attrs, defStyle);
}

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

public void setOnScrollViewListener(OnScrollViewListener onScrollViewListener) {
this.onScrollViewListener = onScrollViewListener;
}

@Override
protected void onScrollChanged(int x, int y, int oldx, int oldy) {
super.onScrollChanged(x, y, oldx, oldy);
if (onScrollViewListener != null) {
onScrollViewListener.onScrollChanged(x, y, oldx, oldy);
}
}
}

使用:

observableScrollView.setOnScrollViewListener(new ObservableScrollView.OnScrollViewListener() {
@Override
public void onScrollChanged(int x, int y, int oldx, int oldy) {
}
});

根据item高度自适应的ViewPager：

/**
* 根据View的内容自动适应高度的ViewPager
*/
public class AutofitViewPager extends ViewPager {

private static final String TAG = "AutofitViewPager";

public AutofitViewPager(Context context) {
this(context, null);
}

public AutofitViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
addOnPageChangeListener(new OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}

@Override
public void onPageSelected(int position) {
requestLayout();
}

@Override
public void onPageScrollStateChanged(int state) {
}
});
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
Log.d(TAG, "onMeasure");
// find the current child view
View view = getChildAt(getCurrentItem());
if (view != null) {
// measure the current child view with the specified measure spec
view.measure(widthMeasureSpec, heightMeasureSpec);
}

setMeasuredDimension(getMeasuredWidth(), measureHeight(heightMeasureSpec, view));
}

/**
* Determines the height of this view
*
* @param measureSpec A measureSpec packed into an int
* @param view        the base view with already measured height
* @return The height of the view, honoring constraints from measureSpec
*/
private int measureHeight(int measureSpec, View view) {
int result = 0;
int specMode = MeasureSpec.getMode(measureSpec);
int specSize = MeasureSpec.getSize(measureSpec);

if (specMode == MeasureSpec.EXACTLY) {
result = specSize;
} else {
// set the height from the base view if available
if (view != null) {
result = view.getMeasuredHeight();
}
if (specMode == MeasureSpec.AT_MOST) {
result = Math.min(result, specSize);
}
}
return result;
}

}

完全展开的ListView:

public class SpreadListView extends ListView {
public SpreadListView(Context context) {
super(context);
}

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

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

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int newHeightSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, newHeightSpec);
}
}

RecyclerView相对简单直接设置

.setNestedScrollingEnabled(false);

就可解决滑动冲突

问题就这样解决了 ， 方法可能略显笨重

感谢 ： http://blog.csdn.net/weixin_36924912/article/details/76590958