package com.ihewro.focus.helper; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Paint; import android.support.v4.content.ContextCompat; import android.support.v7.widget.RecyclerView; import android.support.v7.widget.helper.ItemTouchHelper; import android.view.View; import com.blankj.ALog; import com.ihewro.focus.R; import com.ihewro.focus.decoration.ISuspensionInterface; import com.ihewro.focus.util.UIUtil; import java.util.List; public class SimpleItemTouchHelperCallback extends ItemTouchHelper.Callback { private final ItemTouchHelperAdapter mAdapter; private Context context; Paint p = new Paint(); private List<? extends SwipeInterface> mDatas; public SimpleItemTouchHelperCallback(ItemTouchHelperAdapter adapter, Context context, List<? extends SwipeInterface> datas) { mAdapter = adapter; this.context=context; mDatas = datas; } @Override public boolean isLongPressDragEnabled() { return false; } @Override public boolean isItemViewSwipeEnabled() { return true; } @Override public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) { // Enable drag up and down and right swipe in right direction final int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN; final int swipeFlags = ItemTouchHelper.END; // final int swipeFlags = ItemTouchHelper.END | ItemTouchHelper.START; Enable swipe in both direction return makeMovementFlags(dragFlags, swipeFlags); } @Override public long getAnimationDuration(RecyclerView recyclerView, int animationType, float animateDx, float animateDy) { // return animationType == ItemTouchHelper.ANIMATION_TYPE_DRAG ? DEFAULT_DRAG_ANIMATION_DURATION : DEFAULT_SWIPE_ANIMATION_DURATION; return animationType == ItemTouchHelper.ANIMATION_TYPE_DRAG ? DEFAULT_DRAG_ANIMATION_DURATION : 350; } @Override public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder source, RecyclerView.ViewHolder target) { if (source.getItemViewType() != target.getItemViewType()) { return false; } // Notify the adapter of the move mAdapter.onItemMove(source.getAdapterPosition(), target.getAdapterPosition()); return true; } @Override public void onChildDrawOver(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) { super.onChildDrawOver(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive); } private float origin_dx = 0; @Override public void onSwiped(final RecyclerView.ViewHolder viewHolder, int i) { if (mDatas.size() > 0){ origin_dx = 0; ALog.d("宽度" + viewHolder.itemView.getWidth()); mAdapter.onItemDismiss(viewHolder.getAdapterPosition()); } } @Override public int getBoundingBoxMargin() { return super.getBoundingBoxMargin(); } @Override public void onChildDraw(final Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) { super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive); // Fade out the view as it is swiped out of the parent's bounds if (actionState == ItemTouchHelper.ACTION_STATE_SWIPE) { View itemView = viewHolder.itemView; ALog.d("dx" + dX + "originDx" + origin_dx); int width = itemView.getWidth(); Bitmap icon; if (dX > 0) { origin_dx = dX; int position = viewHolder.getAdapterPosition(); if (position > -1 && mDatas != null && position < mDatas.size()){//处理越界错误 if (mDatas.get(position).isRead()){ icon = BitmapFactory.decodeResource(context.getResources(), R.drawable.ic_action_operation_uncheck); }else { icon = BitmapFactory.decodeResource(context.getResources(), R.drawable.ic_action_operation_check); } // Set color for right swipe p.setColor(ContextCompat.getColor(context, R.color.blue)); // Draw Rect with varying right side, equal to displacement dX c.drawRect((float) itemView.getLeft() + UIUtil.dpToPx(0), (float) itemView.getTop(), dX + UIUtil.dpToPx(0), (float) itemView.getBottom(), p); // Set the image icon for right swipe c.drawBitmap(icon, (float) itemView.getLeft() + UIUtil.dpToPx(16), (float) itemView.getTop() + ((float) itemView.getBottom() - (float) itemView.getTop() - icon.getHeight()) / 2, p); icon.recycle(); } } if (dX == 0 && origin_dx >0 && origin_dx < width){ //说明滑动了一部分又关闭了,这个时候也要标记已读 origin_dx = 0; // mAdapter.onItemDismiss(viewHolder.getAdapterPosition()); } } } @Override public void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) { if (actionState != ItemTouchHelper.ACTION_STATE_IDLE) { // Let the view holder know that this item is being moved or dragged ItemTouchHelperViewHolder itemViewHolder = (ItemTouchHelperViewHolder) viewHolder; itemViewHolder.onItemSelected(context); } super.onSelectedChanged(viewHolder, actionState); /* final boolean swiping = actionState == ItemTouchHelper.ACTION_STATE_SWIPE; swipeRefreshLayout.setEnabled(!swiping);*/ } @Override public void clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) { super.clearView(recyclerView, viewHolder); // Tell the view holder it's time to restore the idle state ItemTouchHelperViewHolder itemViewHolder = (ItemTouchHelperViewHolder) viewHolder; itemViewHolder.onItemClear(context); } @Override public float getMoveThreshold(RecyclerView.ViewHolder viewHolder) { // return super.getMoveThreshold(viewHolder); return 0.1f; // return super.getMoveThreshold(0.5f); } @Override public float getSwipeThreshold(RecyclerView.ViewHolder viewHolder) { //if (viewHolder instanceof RecyclerView.ViewHolder) return 1f; //return super.getSwipeThreshold(viewHolder); return 0.9f; } public List<? extends SwipeInterface> getmDatas() { return mDatas; } public void setmDatas(List<? extends SwipeInterface> mDatas) { this.mDatas = mDatas; } }