nestedscrollview嵌套无法流畅的滑动


<?xml version="1.0" encoding="utf-8"?>

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"

    android:layout_height="match_parent"
    tools:context="com.sotrun.act.mainfun.JSONQueryTableActivity">

    <LinearLayout

        android:id="@+id/backdrop_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/themeColor"
        android:orientation="vertical">

        <LinearLayout

            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:gravity="center_vertical"
            android:orientation="horizontal">

            <ImageView
                android:id="@+id/ic_back"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="@dimen/spacing_smlarge"
                android:src="@drawable/ic_menu_back"
                app:tint="@color/white_no_night"

                />

            <TextView
                android:id="@+id/tv_title"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="@dimen/spacing_smlarge"
                android:layout_marginRight="@dimen/spacing_smlarge"
                android:text="Filter result"
                android:textAppearance="@style/TextAppearance.AppCompat.Subhead"
                android:textColor="@color/white_no_night" />

            <View
                android:layout_width="0dp"
                android:layout_height="0dp"
                android:layout_weight="1" />

            <ImageView
                android:id="@+id/action_cancel"
                android:layout_width="?attr/actionBarSize"
                android:layout_height="?attr/actionBarSize"
                android:padding="@dimen/spacing_large"
                android:src="@drawable/ic_close"
                android:visibility="visible"
                app:tint="@color/white_no_night" />

            <TextView
                android:id="@+id/action_menu_export"
                android:layout_width="wrap_content"
                android:layout_height="?attr/actionBarSize"
                android:gravity="center"
                android:paddingLeft="10dp"
                android:paddingRight="10dp"
                android:text="@string/export"
                android:textColor="@color/white_no_night"
                android:visibility="visible"
                app:tint="@color/white" />

            <ImageView
                android:id="@+id/action_menu"
                android:layout_width="?attr/actionBarSize"
                android:layout_height="?attr/actionBarSize"
                android:padding="@dimen/spacing_large"
                android:src="@drawable/ic_tune"
                app:tint="@color/white_no_night" />
        </LinearLayout>

        <androidx.core.widget.NestedScrollView
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <LinearLayout
                android:id="@+id/layout_form"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical">

            </LinearLayout>
        </androidx.core.widget.NestedScrollView>

    </LinearLayout>

    <androidx.cardview.widget.CardView
        android:id="@+id/root"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginTop="?attr/actionBarSize"
        android:visibility="visible"
        app:cardBackgroundColor="@color/white"
        app:cardCornerRadius="6dp"
        app:cardElevation="8dp">

        <com.scwang.smart.refresh.layout.SmartRefreshLayout

            android:id="@+id/refreshlayout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:visibility="visible">

            <androidx.core.widget.NestedScrollView
                style="@style/scrollbar_style"
                >

                <LinearLayout
                    android:id="@+id/table_container"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:orientation="vertical">

<!--                    <com.sotrun.ui.thrid.MySmartTable-->
                    <com.bin.david.form.core.SmartTable
                        android:id="@+id/tableview"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:minHeight="100dp"
                        />
                </LinearLayout>

            </androidx.core.widget.NestedScrollView>

            <com.scwang.smart.refresh.header.ClassicsHeader
                android:layout_width="match_parent"
                android:layout_height="wrap_content" />

        </com.scwang.smart.refresh.layout.SmartRefreshLayout>

    </androidx.cardview.widget.CardView>

</FrameLayout>

额，是嵌套滑动控制fab的无法流畅的滑动


public class MySmartTable extends SmartTable implements NestedScrollingChild {

    public static final String TAG = MySmartTable.class.getSimpleName();

    private int mLastMotionY;

    private final int[] mScrollOffset = new int[2];
    private final int[] mScrollConsumed = new int[2];

    private int mNestedYOffset;

    private NestedScrollingChildHelper mChildHelper;
    private boolean _nestedScroll=true;

    public MySmartTable(Context context) {
        super(context);
        init(context, null, 0);
    }

    public MySmartTable(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context, attrs, 0);
    }

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

    private void init(Context context, AttributeSet attrs, int defStyle) {
        mChildHelper = new NestedScrollingChildHelper(this);
        if (attrs != null) {
            TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SmartTable, defStyle, 0);
            boolean nestedScroll = a.getBoolean(R.styleable.SmartTable_nestedScrollable, _nestedScroll);
            a.recycle();
            mChildHelper.setNestedScrollingEnabled(nestedScroll);
        } else {
            mChildHelper.setNestedScrollingEnabled(true);

        }
//        setNestedScrollingEnabled(true);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        boolean result = false;

        MotionEvent trackedEvent = MotionEvent.obtain(event);

        final int action = event.getActionMasked();// MotionEvent.getActionMasked(event); masked解决多指触摸bug.

        if (action == MotionEvent.ACTION_DOWN) {
            mNestedYOffset = 0;
        }
        int y = (int) event.getY();
        event.offsetLocation(0, mNestedYOffset);

        switch (action) {
            case MotionEvent.ACTION_DOWN:
                mLastMotionY = y;
                startNestedScroll(ViewCompat.SCROLL_AXIS_VERTICAL);
                result = super.onTouchEvent(event);
                break;
            case MotionEvent.ACTION_MOVE:
                int deltaY = mLastMotionY - y;

                if (dispatchNestedPreScroll(0, deltaY, mScrollConsumed, mScrollOffset)) {
                    deltaY -= mScrollConsumed[1];
                    trackedEvent.offsetLocation(0, mScrollOffset[1]);
                    mNestedYOffset += mScrollOffset[1];
                }

                int oldY = getScrollY();
                mLastMotionY = y - mScrollOffset[1];
                if (deltaY < 0) {
                    int newScrollY = Math.max(0, oldY + deltaY);
                    deltaY -= newScrollY - oldY;
                    if (dispatchNestedScroll(0, newScrollY - deltaY, 0, deltaY, mScrollOffset)) {
                        mLastMotionY -= mScrollOffset[1];
                        trackedEvent.offsetLocation(0, mScrollOffset[1]);
                        mNestedYOffset += mScrollOffset[1];
                    }
                } else {//解决 只能隐藏却无法显示问题。
                    int newScrollY = Math.min(0, oldY + deltaY);
                    deltaY -= newScrollY - oldY;
                    if (dispatchNestedScroll(0, newScrollY - deltaY, 0, deltaY, mScrollOffset)) {
                        mLastMotionY -= mScrollOffset[1];
                        trackedEvent.offsetLocation(0, mScrollOffset[1]);
                        mNestedYOffset += mScrollOffset[1];
                    }
                }

                trackedEvent.recycle();
                result = super.onTouchEvent(trackedEvent);
                break;
            case MotionEvent.ACTION_POINTER_DOWN:
            case MotionEvent.ACTION_UP:
            case MotionEvent.ACTION_CANCEL:
                stopNestedScroll();
                result = super.onTouchEvent(event);
                break;
        }
        return result;
    }
    //todo 导出待做

    // NestedScrollingChild

    @Override
    public void setNestedScrollingEnabled(boolean enabled) {
        if (mChildHelper == null) {
            _nestedScroll=enabled;
            return;
        }
        mChildHelper.setNestedScrollingEnabled(enabled);
    }
    @Override
    public boolean isNestedScrollingEnabled() {
        return mChildHelper.isNestedScrollingEnabled();
    }

    @Override
    public boolean startNestedScroll(int axes) {
        return mChildHelper.startNestedScroll(axes);
    }

    @Override
    public void stopNestedScroll() {
        if (BuildConfig.DEBUG) {
            Log.w(TAG, "STOP NESTED SCROLL");
        }
        mChildHelper.stopNestedScroll();
    }

    @Override
    public boolean hasNestedScrollingParent() {
        return mChildHelper.hasNestedScrollingParent();
    }

    @Override
    public boolean dispatchNestedScroll(int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int[] offsetInWindow) {
        return mChildHelper.dispatchNestedScroll(dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed, offsetInWindow);
    }

    @Override
    public boolean dispatchNestedPreScroll(int dx, int dy, int[] consumed, int[] offsetInWindow) {
        return mChildHelper.dispatchNestedPreScroll(dx, dy, consumed, offsetInWindow);
    }

    @Override
    public boolean dispatchNestedFling(float velocityX, float velocityY, boolean consumed) {
        return mChildHelper.dispatchNestedFling(velocityX, velocityY, consumed);
    }

    @Override
    public boolean dispatchNestedPreFling(float velocityX, float velocityY) {
        return mChildHelper.dispatchNestedPreFling(velocityX, velocityY);
    }

}

huangyanbin / smartTable

nestedscrollview嵌套无法流畅的滑动 #291