Android ScrollView使用常见问题汇总

子布局不足以铺满全屏的时候，使match_parent生效
android:fillViewport="true"

不显示滚动条
android:scrollbars="none"

设置item之间间隔
recyclerView.addItemDecoration(new SpacesItemDecorationBottom(1));

嵌套在ScrollView内：
显示不全问题，需要多加一层，嵌套RelativeLayout，而不是LinerLayout
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">

<android.support.v7.widget.RecyclerView
android:id="@+id/hw_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|top"></android.support.v7.widget.RecyclerView>
</RelativeLayout>

解决嵌套问题的另一种办法：改造RecyclerView让其可以嵌套在LinerLayout内
public class NestRecyclerView extends RecyclerView {
public NestRecyclerView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
setLayoutManager(new LinearLayoutManager(context));
setNestedScrollingEnabled(false);
}

@Override
protected void onMeasure(int widthSpec, int heightSpec) {
int newHeightSpec=MeasureSpec.makeMeasureSpec(0,MeasureSpec.UNSPECIFIED);
super.onMeasure(widthSpec, newHeightSpec);
}
}


失去惯性问题
recyclerView.setLayoutManager(new LinearLayoutManager(activity){
@Override
public boolean canScrollVertically() {
return false;
}
});

滑动的冲突
recyclerView.setNestedScrollingEnabled(false);