RecyclerView下拉刷新，左滑删除和项目点击事件的监听

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RecyclerView下拉刷新，左滑删除和项目点击事件的监听

上篇介绍RecyclerView基本用法及通用adapter的配置,可以方便的进行开发,下面基于一些具体需求对RecyclerView进行扩展,本文可实现其配合下啦刷新,左滑删除及点击的监听,代码可直接粘贴使用;

效果图

1.配置gradle这个：

compile 'com.jakewharton:butterknife:5.1.1'
compile 'com.android.support:recyclerview-v7:23.1.0'

2.Activity中的XML：

activity_recycler_view_demo.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
    <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/swipeRefreshLayout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" >
        <android.support.v7.widget.RecyclerView
            xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/recycler_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"/>
    </android.support.v4.widget.SwipeRefreshLayout>
</RelativeLayout>

3.ACTIVITY代码：

public class RecyclerViewDemo extends AppCompatActivity implements NormalRecyclerViewAdapter.IonSlidingViewClickListener, SwipeRefreshLayout.OnRefreshListener {
    @InjectView(R.id.swipeRefreshLayout)
    SwipeRefreshLayout mSwipeRefreshLayout;
    private String TAG = "RecyclerViewDemo";
    @InjectView(R.id.recycler_view)
    RecyclerView mRecyclerView;
    NormalRecyclerViewAdapter adapter;
    private static final int REFRESH_STATUS = 0;
    private int j = 0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_recycler_view_demo);
        ButterKnife.inject(this);
        initView();
    }
    private void initView() {
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));//这里用线性显示 类似于listview
//下面的两种方式自己可以试试看下效果就知道了
        //mRecyclerView.setLayoutManager(new GridLayoutManager(this, 2));//这里用线性宫格显示 类似于grid view
        //mRecyclerView.setLayoutManager(new     StaggeredGridLayoutManager(2,OrientationHelper.VERTICAL));//这里用线性宫格显示 类似于瀑布流
        adapter = new NormalRecyclerViewAdapter(this);
        //设置Item增加、移除动画
        mRecyclerView.setItemAnimator(new DefaultItemAnimator());
        mRecyclerView.setAdapter(adapter);
        mSwipeRefreshLayout.setOnRefreshListener(this);
        mSwipeRefreshLayout.setColorSchemeResources(android.R.color.holo_blue_bright,   android.R.color.holo_green_light,                android.R.color.holo_orange_light, android.R.color.holo_red_light);
 
        mSwipeRefreshLayout.post(new Runnable() {
            @Override
            public void run() {
                mSwipeRefreshLayout.setRefreshing(true);
            }
        });
        onRefresh();
    }
    @Override
    public void onItemClick(View view, int position) {
        Toast.makeText(RecyclerViewDemo.this, "单击" + position, Toast.LENGTH_SHORT).show();
    }
    @Override
    public void onDeleteBtnCilck(View view, int position) {
        Toast.makeText(RecyclerViewDemo.this, "删除" + position, Toast.LENGTH_SHORT).show();
        adapter.removeData(position);
    }
    @Override
    public void onRefresh() {
        refreshHandler.sendEmptyMessageDelayed(REFRESH_STATUS, 2000);
    }
    private Handler refreshHandler = new Handler()
    {
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case REFRESH_STATUS:
                    //下拉刷新执行的操作，刷新数据
                    mSwipeRefreshLayout.setRefreshing(false);
                    List<String> strings = new ArrayList<>();
                    for (int i = 0; i < 10; i++) {
                        j++;
                        strings.add("测试" + j);
                    }
                    adapter.updateData(strings);
                    break;
            }
        }
    };
}

4.适配器代码（NormalRecyclerViewAdapter）

public class NormalRecyclerViewAdapter extends RecyclerView.Adapter<NormalRecyclerViewAdapter.MyViewHolder> implements SlidingButtonView.IonSlidingButtonListener {
    private Context mContext;
    private IonSlidingViewClickListener mIDeleteBtnClickListener;
    private List<String> mDatas = new ArrayList<String>();
    private SlidingButtonView mMenu = null;
    public NormalRecyclerViewAdapter(Context context) {
        mContext = context;
        mIDeleteBtnClickListener = (IonSlidingViewClickListener) context;
        for (int i = 0; i < 20; i++) {
            mDatas.add("第"+i+"个测试");
        }
    }
    public void updateData( List<String> mDatas){
        this.mDatas = mDatas;
        notifyDataSetChanged();
    }
    @Override
    public int getItemCount() {
        return mDatas.size();
    }
    @Override
    public void onBindViewHolder(final MyViewHolder holder, int position) {
        holder.textView.setText(mDatas.get(position));        //设置内容布局的宽为屏幕宽度
       ///获取屏幕信息
 
        holder.layout_content.getLayoutParams().width = getScreenWidth(mContext);
        holder.textView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //判断是否有删除菜单打开
                if (menuIsOpen()) {
                    closeMenu();//关闭菜单
                } else {
                    int n = holder.getLayoutPosition();
                    mIDeleteBtnClickListener.onItemClick(v, n);
                }
            }
        });
        holder.btn_Delete.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int n = holder.getLayoutPosition();
                mIDeleteBtnClickListener.onDeleteBtnCilck(v, n);
            }
        });
    }
 
    /**
     * 获取屏幕宽度
     * @param context
     * @return
     */
    public static int getScreenWidth(Context context) {
        WindowManager manager = (WindowManager) context
                .getSystemService(Context.WINDOW_SERVICE);
        Display display = manager.getDefaultDisplay();
        return display.getWidth();
    }
    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup arg0, int arg1) {
        View view = LayoutInflater.from(mContext).inflate(R.layout.layout_item, arg0,false);
        MyViewHolder holder = new MyViewHolder(view);
        return holder;
    }
    class MyViewHolder extends RecyclerView.ViewHolder {
        public TextView btn_Delete;
        public TextView textView;
        public ViewGroup layout_content;
        public MyViewHolder(View itemView) {
            super(itemView);
            btn_Delete = (TextView) itemView.findViewById(R.id.tv_delete);
            textView = (TextView) itemView.findViewById(R.id.text);
            layout_content = (ViewGroup) itemView.findViewById(R.id.layout_content);
            ((SlidingButtonView) itemView).setSlidingButtonListener(NormalRecyclerViewAdapter.this);
        }
    }
    public void removeData(int position){
        mDatas.remove(position);
        notifyItemRemoved(position);
    }
    /**     * 删除菜单打开信息接收     */
    @Override
    public void onMenuIsOpen(View view) {
        mMenu = (SlidingButtonView) view;
    }
    /**
     * 滑动或者点击了Item监听
     * @param slidingButtonView
     */
    @Override
    public void onDownOrMove(SlidingButtonView slidingButtonView) {
        if(menuIsOpen()){
            if(mMenu != slidingButtonView){
                closeMenu();
            }
        }
    }
    /**     * 关闭菜单     */
    public void closeMenu() {
        mMenu.closeMenu();
        mMenu = null;
    }
    /**     * 判断是否有菜单打开     */
    public Boolean menuIsOpen() {
        if(mMenu != null){
            return true;
        }
        return false;
    }
    public interface IonSlidingViewClickListener {
        void onItemClick(View view, int position);
        void onDeleteBtnCilck(View view, int position);
    }
}

5.适配器的布局

layout_item.xml

<?xml version="1.0" encoding="utf-8"?>
<com.tianqihulian.getui_test.recycleview.SlidingButtonView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="60dp"
    android:layout_marginBottom="1dp"
    android:background="@android:color/white">
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
        <RelativeLayout
            android:id="@+id/layout_content"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
            <TextView
                android:id="@+id/text"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="@color/white"
                android:gravity="center_vertical"
                android:textColor="#DD000000"
                android:textSize="16dp" />
        </RelativeLayout>
        <TextView
            android:id="@+id/tv_delete"
            android:layout_width="80dp"
            android:layout_height="match_parent"
            android:layout_toRightOf="@+id/layout_content"
            android:background="@color/red"
            android:gravity="center"
            android:text="删 除"
            android:textColor="#DDFFFFFF"/>
    </RelativeLayout>
</com.tianqihulian.getui_test.recycleview.SlidingButtonView>

6.适配器布局里面我们使用了一个自定义的HorizontalScrollView---SlidingButtonView用来实现左滑删除

public class SlidingButtonView extends HorizontalScrollView {
    private TextView mTextView_Delete;
    private int mScrollWidth;
    private IonSlidingButtonListener mIonSlidingButtonListener;
    private Boolean isOpen = false;
    private Boolean once = false;
 
    public SlidingButtonView(Context context) {
        this(context, null);
    }
 
    public SlidingButtonView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }
 
    public SlidingButtonView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        this.setOverScrollMode(OVER_SCROLL_NEVER);
    }
 
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        if (!once) {
            mTextView_Delete = (TextView) findViewById(R.id.tv_delete);
            once = true;
        }
    }
 
    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        super.onLayout(changed, l, t, r, b);
        if (changed) {
            this.scrollTo(0, 0);
            //获取水平滚动条可以滑动的范围，即右侧按钮的宽度
            mScrollWidth = mTextView_Delete.getWidth();
        }
    }
 
    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        int action = ev.getAction();
        switch (action) {
            case MotionEvent.ACTION_DOWN:
            case MotionEvent.ACTION_MOVE:
                if(mIonSlidingButtonListener != null) {
                    mIonSlidingButtonListener.onDownOrMove(this);
                }
                break;
            case MotionEvent.ACTION_UP:
            case MotionEvent.ACTION_CANCEL:
                changeScrollx();
                return true;
            default:
                break;
        }
        return super.onTouchEvent(ev);
    }
 
    /**
     * 按滚动条被拖动距离判断关闭或打开菜单
     */
    public void changeScrollx() {
        if (getScrollX() >= (mScrollWidth / 2)) {
            this.smoothScrollTo(mScrollWidth, 0);
            isOpen = true;
            mIonSlidingButtonListener.onMenuIsOpen(this);
        } else {
            this.smoothScrollTo(0, 0);
            isOpen = false;
        }
    }
 
    /**
     * 打开菜单
     */
    public void openMenu() {
        if (isOpen) {
            return;
        }
        this.smoothScrollTo(mScrollWidth, 0);
        isOpen = true;
        mIonSlidingButtonListener.onMenuIsOpen(this);
    }
 
    /**
     * 关闭菜单
     */
    public void closeMenu() {
        if (!isOpen) {
            return;
        }
        this.smoothScrollTo(0, 0);
        isOpen = false;
    }
 
    public void setSlidingButtonListener(IonSlidingButtonListener listener) {
        mIonSlidingButtonListener = listener;
    }
 
    public interface IonSlidingButtonListener {
        void onMenuIsOpen(View view);
 
        void onDownOrMove(SlidingButtonView slidingButtonView);
    }
 
}
基于此就可以实现上述功能了  具体需求再根据需求添加即可

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