ItemDragAndSwipeUseActivity.java

package com.chad.baserecyclerviewadapterhelper;

import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.helper.ItemTouchHelper;
import android.util.Log;
import android.view.View;

import com.chad.baserecyclerviewadapterhelper.adapter.ItemDragAdapter;
import com.chad.baserecyclerviewadapterhelper.base.BaseActivity;
import com.chad.baserecyclerviewadapterhelper.util.ToastUtils;
import com.chad.library.adapter.base.BaseQuickAdapter;
import com.chad.library.adapter.base.BaseViewHolder;
import com.chad.library.adapter.base.callback.ItemDragAndSwipeCallback;
import com.chad.library.adapter.base.listener.OnItemDragListener;
import com.chad.library.adapter.base.listener.OnItemSwipeListener;

import java.util.ArrayList;
import java.util.List;

/**
 * https://github.com/CymChad/BaseRecyclerViewAdapterHelper
 */
public class ItemDragAndSwipeUseActivity extends BaseActivity {
    private static final String TAG = ItemDragAndSwipeUseActivity.class.getSimpleName();
    private RecyclerView mRecyclerView;
    private List<String> mData;
    private ItemDragAdapter mAdapter;
    private ItemTouchHelper mItemTouchHelper;
    private ItemDragAndSwipeCallback mItemDragAndSwipeCallback;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_item_touch_use);
        setBackBtn();
        setTitle("ItemDrag  And Swipe");
        mRecyclerView = (RecyclerView) findViewById(R.id.rv_list);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        mData = generateData(50);
        OnItemDragListener listener = new OnItemDragListener() {
            @Override
            public void onItemDragStart(RecyclerView.ViewHolder viewHolder, int pos) {
                Log.d(TAG, "drag start");
                BaseViewHolder holder = ((BaseViewHolder) viewHolder);
//                holder.setTextColor(R.id.tv, Color.WHITE);
            }

            @Override
            public void onItemDragMoving(RecyclerView.ViewHolder source, int from, RecyclerView.ViewHolder target, int to) {
                Log.d(TAG, "move from: " + source.getAdapterPosition() + " to: " + target.getAdapterPosition());
            }

            @Override
            public void onItemDragEnd(RecyclerView.ViewHolder viewHolder, int pos) {
                Log.d(TAG, "drag end");
                BaseViewHolder holder = ((BaseViewHolder) viewHolder);
//                holder.setTextColor(R.id.tv, Color.BLACK);
            }
        };
        final Paint paint = new Paint();
        paint.setAntiAlias(true);
        paint.setTextSize(20);
        paint.setColor(Color.BLACK);
        OnItemSwipeListener onItemSwipeListener = new OnItemSwipeListener() {
            @Override
            public void onItemSwipeStart(RecyclerView.ViewHolder viewHolder, int pos) {
                Log.d(TAG, "view swiped start: " + pos);
                BaseViewHolder holder = ((BaseViewHolder) viewHolder);
//                holder.setTextColor(R.id.tv, Color.WHITE);
            }

            @Override
            public void clearView(RecyclerView.ViewHolder viewHolder, int pos) {
                Log.d(TAG, "View reset: " + pos);
                BaseViewHolder holder = ((BaseViewHolder) viewHolder);
//                holder.setTextColor(R.id.tv, Color.BLACK);
            }

            @Override
            public void onItemSwiped(RecyclerView.ViewHolder viewHolder, int pos) {
                Log.d(TAG, "View Swiped: " + pos);
            }

            @Override
            public void onItemSwipeMoving(Canvas canvas, RecyclerView.ViewHolder viewHolder, float dX, float dY, boolean isCurrentlyActive) {
                canvas.drawColor(ContextCompat.getColor(ItemDragAndSwipeUseActivity.this, R.color.color_light_blue));
//                canvas.drawText("Just some text", 0, 40, paint);
            }
        };

        mAdapter = new ItemDragAdapter(mData);
        mItemDragAndSwipeCallback = new ItemDragAndSwipeCallback(mAdapter);
        mItemTouchHelper = new ItemTouchHelper(mItemDragAndSwipeCallback);
        mItemTouchHelper.attachToRecyclerView(mRecyclerView);

        //mItemDragAndSwipeCallback.setDragMoveFlags(ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT | ItemTouchHelper.UP | ItemTouchHelper.DOWN);
        mItemDragAndSwipeCallback.setSwipeMoveFlags(ItemTouchHelper.START | ItemTouchHelper.END);
        mAdapter.enableSwipeItem();
        mAdapter.setOnItemSwipeListener(onItemSwipeListener);
        mAdapter.enableDragItem(mItemTouchHelper);
        mAdapter.setOnItemDragListener(listener);
//        mRecyclerView.addItemDecoration(new GridItemDecoration(this ,R.drawable.list_divider));

        mRecyclerView.setAdapter(mAdapter);
//        mRecyclerView.addOnItemTouchListener(new OnItemClickListener() {
//            @Override
//            public void onSimpleItemClick(final BaseQuickAdapter adapter, final View view, final int position) {
//                ToastUtils.showShortToast("点击了" + position);
//            }
//        });
        mAdapter.setOnItemClickListener(new BaseQuickAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(BaseQuickAdapter adapter, View view, int position) {
                ToastUtils.showShortToast("点击了" + position);
            }
        });
    }

    private List<String> generateData(int size) {
        ArrayList<String> data = new ArrayList<>(size);
        for (int i = 0; i < size; i++) {
            data.add("item " + i);
        }
        return data;
    }


}