创建一个自定义 ScrollView（创建一个类并让它扩展 HorizontalScrollView）并为可滚动创建一个 getter setter。然后覆盖 computeScrollDeltaToGetChildRectOnScreen。
工作原理：每当 android 有一个编辑文本或焦点不在屏幕上的东西时，它都会调用方法 computeScrollDeltaToGetChildRectOnScreen 将其显示出来。如果你覆盖它并在它被禁用时返回 0 比它不会滚动......
所以你会有一个像这样的自定义滚动视图：
public class TrackableHorizontalScrollView extends HorizontalScrollView {
// true if we can scroll (not locked)
// false if we cannot scroll (locked)
private boolean mScrollable = true;
public TrackableHorizontalScrollView(Context context) {
super(context);
}
public TrackableHorizontalScrollView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public TrackableHorizontalScrollView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public void setScrollingEnabled(boolean enabled) {
mScrollable = enabled;
}
public boolean isScrollable() {
return mScrollable;
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
// if we can scroll pass the event to the superclass
if (mScrollable) return super.onTouchEvent(ev);
// only continue to handle the touch event if scrolling enabled
return mScrollable; // mScrollable is always false at this point
default:
return super.onTouchEvent(ev);
}
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
// Don't do anything with intercepted touch events if
// we are not scrollable
if (!mScrollable) return false;
else return super.onInterceptTouchEvent(ev);
}
@Override
public void scrollTo(int x, int y){
if (!mScrollable) return;
super.scrollTo(x, y);
}
//Custom smooth scroll method since norm is final and cannot be overridden
public final void smooothScrollToIfEnabled(int x, int y){
if (!mScrollable) return;
smoothScrollTo(x, y);
}
@Override
protected int computeScrollDeltaToGetChildRectOnScreen(android.graphics.Rect rect){
if (!mScrollable) return 0;
return super.computeScrollDeltaToGetChildRectOnScreen(rect);
}
}
您可以像这样在 XML 中使用它：
<com.your.package.ui.widget.TrackableHorizontalScrollView
android:id="@+id/wi_et_credit_scroller"
android:layout_toRightOf="@id/wi_et_credit_iv"
android:layout_width="fill_parent"
android:scrollbars="none"
android:layout_height="wrap_content"
android:paddingRight="5dp"
android:layout_gravity="center_vertical">
<!--Whatever you have inside the scrollview-->
</com.your.package.ui.widget.TrackableHorizontalScrollView>