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Question

我已实施此项目：collapsing like whatsapp profile 但是我有卷轴和崩溃的问题。特别是滞后

解释问题，我附加了一个视频问题

video

这是我的 MainActivity ：

     protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_detail);
        ButterKnife.bind(this);

        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        initUi();
}

        private void initUi() {
        appBarLayout.addOnOffsetChangedListener(this);

        toolbarHeaderView.bindTo("Larry Page", "Last seen today at 7.00PM");
        floatHeaderView.bindTo("Larry Page", "Last seen today at 7.00PM");
    }

    @Override
    public void onOffsetChanged(AppBarLayout appBarLayout, int offset) {
        int maxScroll = appBarLayout.getTotalScrollRange();
        float percentage = (float) Math.abs(offset) / (float) maxScroll;

        if (percentage == 1f && isHideToolbarView) {
            toolbarHeaderView.setVisibility(View.VISIBLE);
            isHideToolbarView = !isHideToolbarView;

        } else if (percentage < 1f && !isHideToolbarView) {
            toolbarHeaderView.setVisibility(View.GONE);
            isHideToolbarView = !isHideToolbarView;
        }
    }

这是我的 xml

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">

<android.support.design.widget.CoordinatorLayout
    android:id="@+id/main_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fitsSystemWindows="true"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsing_toolbar"
            android:layout_width="match_parent"
            android:layout_height="400dp"
            android:fitsSystemWindows="true"
            app:contentScrim="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <ImageView
                android:id="@+id/image"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:fitsSystemWindows="true"
                android:scaleType="centerCrop"
                android:src="@drawable/photo"
                app:layout_collapseMode="parallax" />

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                android:background="@android:color/transparent"
                app:layout_collapseMode="pin"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light">

                <include
                    android:id="@+id/toolbar_header_view"
                    layout="@layout/pls_det_widget_header_view_top"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:visibility="gone" />

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

        </android.support.design.widget.CollapsingToolbarLayout>

    </android.support.design.widget.AppBarLayout>

    <include
        android:id="@+id/float_header_view"
        layout="@layout/pls_det_widget_header_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/scrollView"
        app:layout_behavior="com.projects.PlaceDetHeaderBehavior" />

    <android.support.v4.widget.NestedScrollView
        android:id="@+id/scrollView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:clipToPadding="false"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <include layout="@layout/content_place_detail" />

    </android.support.v4.widget.NestedScrollView>

</android.support.design.widget.CoordinatorLayout>

这是 HeaderBehavior 类

public class PlaceDetHeaderBehavior extends CoordinatorLayout.Behavior<HeaderView> {

private Context mContext;

private int mStartMarginLeft;
private int mEndMarginLeft;
private int mMarginRight;
private int mStartMarginBottom;
private float mTitleStartSize;
private float mTitleEndSize;
private boolean isHide;

public PlaceDetHeaderBehavior(Context context, AttributeSet attrs) {
    super(context, attrs);
    mContext = context;
}

public PlaceDetHeaderBehavior(Context context, AttributeSet attrs, Context mContext) {
    super(context, attrs);
    this.mContext = mContext;
}

public static int getToolbarHeight(Context context) {
    int result = 0;
    TypedValue tv = new TypedValue();
    if (context.getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true)) {
        result = TypedValue.complexToDimensionPixelSize(tv.data, context.getResources().getDisplayMetrics());
    }
    return result;
}

@Override
public boolean layoutDependsOn(CoordinatorLayout parent, HeaderView child, View dependency) {
    return dependency instanceof AppBarLayout;
}

@Override
public boolean onDependentViewChanged(CoordinatorLayout parent, HeaderView child, View dependency) {
    shouldInitProperties();

    int maxScroll = ((AppBarLayout) dependency).getTotalScrollRange();
    float percentage = Math.abs(dependency.getY()) / (float) maxScroll;
    float childPosition = dependency.getHeight()
            + dependency.getY()
            - child.getHeight()
            - (getToolbarHeight(mContext) - child.getHeight()) * percentage / 2;

    childPosition = childPosition - mStartMarginBottom * (1f - percentage);

    CoordinatorLayout.LayoutParams lp = (CoordinatorLayout.LayoutParams) child.getLayoutParams();
    if (Math.abs(dependency.getY()) >= maxScroll / 2) {
        float layoutPercentage = (Math.abs(dependency.getY()) - (maxScroll / 2)) / Math.abs(maxScroll / 2);
        lp.leftMargin = (int) (layoutPercentage * mEndMarginLeft) + mStartMarginLeft;
        child.setTextSize(getTranslationOffset(mTitleStartSize, mTitleEndSize, layoutPercentage));
    } else {
        lp.leftMargin = mStartMarginLeft;
    }
    lp.rightMargin = mMarginRight;
    child.setLayoutParams(lp);
    child.setY(childPosition);

    if (isHide && percentage < 1) {
        child.setVisibility(View.VISIBLE);
        isHide = false;
    } else if (!isHide && percentage == 1) {
        child.setVisibility(View.GONE);
        isHide = true;
    }
    return true;
}

protected float getTranslationOffset(float expandedOffset, float collapsedOffset, float ratio) {
    return expandedOffset + ratio * (collapsedOffset - expandedOffset);
}

private void shouldInitProperties() {
    if (mStartMarginLeft == 0) {
        mStartMarginLeft = mContext.getResources().getDimensionPixelOffset(R.dimen.header_view_start_margin_left);
    }

    if (mEndMarginLeft == 0) {
        mEndMarginLeft = mContext.getResources().getDimensionPixelOffset(R.dimen.header_view_end_margin_left);
    }

    if (mStartMarginBottom == 0) {
        mStartMarginBottom = mContext.getResources().getDimensionPixelOffset(R.dimen.header_view_start_margin_bottom);
    }

    if (mMarginRight == 0) {
        mMarginRight = mContext.getResources().getDimensionPixelOffset(R.dimen.header_view_end_margin_right);
    }

    if (mTitleStartSize == 0) {
        mTitleEndSize = mContext.getResources().getDimensionPixelSize(R.dimen.header_view_end_text_size);
    }

    if (mTitleStartSize == 0) {
        mTitleStartSize = mContext.getResources().getDimensionPixelSize(R.dimen.header_view_start_text_size);
    }
}

但是，代码与我上面链接的存储库相同。我没有做任何改变。有没有人有同样的问题？ 提示？ 谢谢