RecycleView中的Horizo​​ntalScrollView在滚动条的开头

Question

我正在尝试在回收视图中使用Horizo​​ntalScrollView，因此每个项目都将包含他的所有数据，并且我正在尝试从头开始。但无论我在尝试什么，在滚动视图结束之前，我仍然会看到滚动视图的左侧几毫秒

我的布局：

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">


    <com.cobox.core.ui.views.CustomHorizontalScollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/horizontal_scroll_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:fillViewport="true"
    android:scrollbars="none">

    <LinearLayout
        android:id="@+id/view_home_card_and_button_layout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal">


        <ImageView
            android:layout_width="100dp"
            android:layout_height="150dp"
            android:background="@color/amber_200" />

        <android.support.v7.widget.CardView
            android:id="@+id/cardView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="@dimen/half_unit"
            app:cardCornerRadius="4dp">

        </android.support.v7.widget.CardView>


    </LinearLayout>

</com.cobox.core.ui.views.CustomHorizontalScollView>

scrollView：

public class CustomHorizontalScollView extends HorizontalScrollView {

    public OnScrollChangedListener mOnScrollChangedListener;

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

    public CustomHorizontalScollView(Context context, AttributeSet attrs) {
        super(context, attrs);

    }

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

    @Override
    protected void onScrollChanged(int l, int t, int oldl, int oldt) {
        super.onScrollChanged(l, t, oldl, oldt);
        if (mOnScrollChangedListener != null) {
            mOnScrollChangedListener.onScrollChanged(l, t, oldl, oldt);
        }
    }

    public void setOnScrollChangedListener(OnScrollChangedListener onScrollChangedListener) {
        this.mOnScrollChangedListener = onScrollChangedListener;
    }

    public interface OnScrollChangedListener {
        void onScrollChanged(int l, int t, int oldl, int oldt);
    }

}

以及代码的相关部分：

public class HomeScreenCardView extends FrameLayout implements 
HomeCardActionsListener {
public HomeScreenCardView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    this.context = context;


    init(attrs, defStyle);
}

...
private void init(AttributeSet attrs, int defStyle) {

    WindowManager wm = ((Activity) context).getWindowManager();
    Display d = wm.getDefaultDisplay();
    ViewGroup.LayoutParams layoutParams2 = mCardView.getLayoutParams();
    float dip = 8f;
    float px = getPxFromDp(dip);
    layoutParams2.width = (int) (d.getWidth() - px * 2);
    mCardView.setLayoutParams(layoutParams2);

    horizontalScrollView.post(new Runnable() {
        @Override
        public void run() {
            horizontalScrollView.setSmoothScrollingEnabled(false);
            horizontalScrollView.fullScroll(View.FOCUS_RIGHT);
            horizontalScrollView.setSmoothScrollingEnabled(true);

        }
    });
}

Answer 1

尝试 在您的Java代码中

horizontalScrollView.setLayoutDirection(View.FOCUS_RIGHT); 

和XML

android:layoutDirection="rtl"

Answer 2

用下面的代码替换滚动代码

ViewTreeObserver vto = horizontalScrollView.getViewTreeObserver();
    vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener(){
        @Override
        public void onGlobalLayout() {
            horizontalScrollView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
            horizontalScrollView.setSmoothScrollingEnabled(false);
            horizontalScrollView.scrollTo(horizontalScrollView.getWidth(), 0);
            horizontalScrollView.setSmoothScrollingEnabled(false);
        }
    });