ScrollView 和RecyclerView都是滑动组件，因此存在滑动变乱辩论标题，办理思绪就是在变乱分发函数中将此中下层View的滑动变乱做拦截处理
布局示例代码如下：
<com.xxx.xxx.widget.ScrollInterceptScrollView android:id="@+id/scrollView" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@color/white"> <View android:id="@+id/divider2" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#BBBBBB" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" /> <RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent" android:descendantFocusability="blocksDescendants" app:layout_constraintTop_toBottomOf="@+id/linearLayout3"> <androidx.recyclerview.widget.RecyclerView android:id="@+id/rv_menu" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_marginTop="24dp" app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" app:layout_behavior="@string/appbar_scrolling_view_behavior" /> </RelativeLayout> </com.xxx.xxx.widget.ScrollInterceptScrollView>注意:在布局中包裹一层RelativeLayout，而且加上这个属性
android:descendantFocusability="blocksDescendants"
blocksDescendants这个属性的官方解释是viewgroup会覆盖子类控件而直接得到核心
继续ScrollView类自界说ScrollView
import android.annotation.TargetApi;import android.content.Context;import android.os.Build;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.ViewConfiguration;import android.widget.ScrollView;public class ScrollInterceptScrollView extends ScrollView { private int downX, downY; private int mTouchSlop; public ScrollInterceptScrollView(Context context) { this(context, null); } public ScrollInterceptScrollView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public ScrollInterceptScrollView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); } @TargetApi(Build.VERSION_CODES.LOLLIPOP) public ScrollInterceptScrollView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { super(context, attrs, defStyleAttr, defStyleRes); mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); } @Override public boolean onInterceptTouchEvent(MotionEvent ev) { int action = ev.getAction(); switch (action) { case MotionEvent.ACTION_DOWN: downX = (int) ev.getRawX(); downY = (int) ev.getRawY(); break; case MotionEvent.ACTION_MOVE: int moveY = (int) ev.getRawY(); // 判断是否滑动，若滑动就拦截变乱 if (Math.abs(moveY - downY) > mTouchSlop) { return true; } break; default: break; } return super.onInterceptTouchEvent(ev); }}ScrollView滑动加载更多
判断的思绪就是当前滑动的y坐标是否大于即是当前ScrollView 的高度
//这个标记位是为了方式加载更多重复实行 private var isLoadMore = true //页码 private var page=0 //滑动处理，实现滑动监听方法 scrollView.setOnScrollChangeListener { v, scrollX, scrollY, oldScrollX, oldScrollY -> //加载更多 if (scrollY >= scrollView.getChildAt(0) .measuredHeight - scrollView.measuredHeight ) { if (isLoadMore) { Log.i("allyn", "加载更多") isLoadMore = false; page++ getData() } } }讲授完了，盼望对碰到标题的朋侪有资助！！ |
