1、RecyclerView跳轉到指定位置

只需調用recycleview的置頂方法：

recyclerView.scrollToPosition(15);

如果你需要讓第15item在屏幕居中，只需吧scrollToPosition參數變小即可:

如：

recyclerView.scrollToPosition(12);或

recyclerView.scrollToPosition(9);

即可讓15item在屏幕居中

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注：置頂顯示item

mRecyclerView.smoothScrollToPosition(currentIndex);

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RecyclerView.canScrollVertically(1)的值表示是否能向下滾動，false表示已經滾動到底部
RecyclerView.canScrollVertically(-1)的值表示是否能向上滾動，false表示已經滾動到頂部

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2、RecyclerView上下滑動監聽——上拉刷新列表
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private int lastposion, pagenum = 1, pageContent, num; gxwbrecyclerview.addOnScrollListener(new RecyclerView.OnScrollListener() {//用來標記是否正在向最后一個滑動，既是否向右滑動或向下滑動boolean isSlidingToLast = false;@Overridepublic void onScrollStateChanged(RecyclerView recyclerView, int newState) {LinearLayoutManager manager = (LinearLayoutManager) recyclerView.getLayoutManager();// 當不滾動時if (newState == RecyclerView.SCROLL_STATE_IDLE) {//獲取最后一個完全顯示的ItemPositionlastposion = manager.findLastCompletelyVisibleItemPosition();int totalItemCount = manager.getItemCount();if (lastposion == (totalItemCount - 1) && isSlidingToLast&&!ifload) {pagenum++;if (pagenum>pageContent){Toast.makeText(getContext(), "已到底！", Toast.LENGTH_SHORT).show();return;}getarealist(1);}}}@Overridepublic void onScrolled(RecyclerView recyclerView, int dx, int dy) {super.onScrolled(recyclerView, dx, dy);//dx用來判斷橫向滑動方向，dy用來判斷縱向滑動方向//大于0表示，正在向右滾動；小于等于0 表示停止或向左滾動isSlidingToLast = dy > 0;} });

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void onScrollStateChanged(RecyclerView recyclerView, int newState): 滾動狀態變化時回調 void onScrolled(RecyclerView recyclerView, int dx, int dy): 滾動時回調 /*** The RecyclerView is not currently scrolling.（靜止沒有滾動）*/ public static final int SCROLL_STATE_IDLE = 0;/*** The RecyclerView is currently being dragged by outside input such as user touch input.*（正在被外部拖拽,一般為用戶正在用手指滾動）*/ public static final int SCROLL_STATE_DRAGGING = 1;/*** The RecyclerView is currently animating to a final position while not under outside control.*（自動滾動）*/ public static final int SCROLL_STATE_SETTLING = 2;

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3、安卓手機7.0RecyclerView顯示不全解決方法

解決辦法是在RecyclerView的外部套上一層RelativeLayout

<RelativeLayout
? ? android:layout_width="match_parent"
? ? android:layout_height="wrap_content"
? ? android:descendantFocusability="blocksDescendants">

? ? ? ? <android.support.v7.widget.RecyclerView
? ? ? ? ? ? android:id="@+id/menuRv"
? ? ? ? ? ? android:layout_width="match_parent"
? ? ? ? ? ? android:layout_height="wrap_content"
? ? ? ? ? ? android:layout_marginLeft="@dimen/margin_16"
? ? ? ? ? ? android:layout_marginRight="@dimen/margin_16"/>

</RelativeLayout>

Android ScrollView與RecyclerView滑動沖突問題

解決滑動沖突、滑動不流暢
recyclerView.setHasFixedSize(true);
recyclerView.setNestedScrollingEnabled(false);

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滑動速速設置

1、自定義類

public class LinearLayoutManagerWithScrollTop extends LinearLayoutManager {public LinearLayoutManagerWithScrollTop(Context context) {super(context);}public LinearLayoutManagerWithScrollTop(Context context, int orientation, boolean reverseLayout) {super(context, orientation, reverseLayout);}public LinearLayoutManagerWithScrollTop(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {super(context, attrs, defStyleAttr, defStyleRes);}@Overridepublic void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {TopSnappedSmoothScroller topSnappedSmoothScroller = new TopSnappedSmoothScroller(recyclerView.getContext());topSnappedSmoothScroller.setTargetPosition(position);startSmoothScroll(topSnappedSmoothScroller);}class TopSnappedSmoothScroller extends LinearSmoothScroller {public TopSnappedSmoothScroller(Context context) {super(context);}@Nullable@Overridepublic PointF computeScrollVectorForPosition(int targetPosition) {return LinearLayoutManagerWithScrollTop.this.computeScrollVectorForPosition(targetPosition);}/*** MILLISECONDS_PER_INCH 默認為25，及移動每英寸需要花費25ms，如果你要速度變快一點，就直接設置設置小一點，注意這里的單位是f*/protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {return 15f / displayMetrics.densityDpi;}@Overrideprotected int getVerticalSnapPreference() {return SNAP_TO_START;}} }

2、引用即可

mRecyclerView.setLayoutManager(new LinearLayoutManagerWithScrollTop(this));

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不可滑動

// LinearLayoutManager layoutManager = new LinearLayoutManager(this) { // public boolean canScrollVertically() { // return false; // } // };LinearLayoutManager layoutManager = new LinearLayoutManager(this);layoutManager.setOrientation(RecyclerView.VERTICAL);recyclerView.setLayoutManager(layoutManager);

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總結

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