XRecycleView使用

项目需要下拉刷新和上拉加载数据的要求，找到了XRecycleView框架。

记录一下用法。

基本同普通recycleview用法一直，但是可以添加自定义的头部和上拉下拉动画。

一 xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.jcodecraeer.xrecyclerview.XRecyclerView
        android:id="@+id/xrecycle_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </com.jcodecraeer.xrecyclerview.XRecyclerView>

</LinearLayout>

二 activity

public class RefreshLayoutActivity extends BusinessActivity implements RefreshAdapter.onItemClickListener {

    private XRecyclerView xrecycleView;
    private RefreshAdapter adapter;
    private List<Integer> data = new ArrayList<>();


    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_refresh_layout);
        setTitle("xRecycleView刷新加载");
        initView();
    }

    private void initView() {
        xrecycleView = (XRecyclerView) findViewById(R.id.xrecycle_view);
        xrecycleView.setPullRefreshEnabled(true);//设置是否允许下拉刷新，默认为true
        xrecycleView.setLoadingMoreEnabled(true);//设置是否允许上拉加载，默认为true
        xrecycleView.setRefreshProgressStyle(ProgressStyle.BallSpinFadeLoader);//设置下拉刷新的root动画
        xrecycleView.setLoadingMoreProgressStyle(ProgressStyle.Pacman);//设置上拉加载的root动画
        xrecycleView.setLayoutManager(new LinearLayoutManager(this));
        //设置item之间 分隔，此处DividerItemDecoration是自定义的
        xrecycleView.addItemDecoration(new DividerItemDecoration(this, DividerItemDecoration.VERTICAL));

        initData();//初始化数据
        adapter = new RefreshAdapter();
        adapter.setListener(this);
        adapter.setData(data);
        xrecycleView.setAdapter(adapter);

        xrecycleView.setLoadingListener(new XRecyclerView.LoadingListener() {
            @Override
            public void onRefresh() {
                //下拉刷新，要先clear一下原来的数据，不然会有冲突
                data.clear();
                initData();
                adapter.notifyDataSetChanged();
                xrecycleView.refreshComplete();
            }

            @Override
            public void onLoadMore() {
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        addData();
                        adapter.notifyDataSetChanged();
                        xrecycleView.loadMoreComplete();
                    }
                }, 2000);
            }
        });

    }


    @Override
    public void onItemClick(int id, int positon) {
        Toast.makeText(this, "id: " + id + " positon: " + positon, Toast.LENGTH_SHORT).show();
    }

    private void initData() {
        for (int i = 0; i < 20; i++) {
            data.add(i);
        }
    }

    private void addData() {
        for (int i = 21; i < 30; i++) {
            data.add(i);
        }
    }
}

三 adapter

public class RefreshAdapter extends RecyclerView.Adapter<RefreshAdapter.ViewHolder> {

    private List<Integer> data;

    public void setData(List<Integer> data) {
        this.data = data;
    }

    private onItemClickListener listener;

    public void setListener(onItemClickListener listener) {
        this.listener = listener;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_refresh_layout, parent, false);

        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, final int position) {
        holder.tvItemid.setText("id: " + data.get(position));
        holder.rootView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (null != listener && null != data.get(position)) {
                    listener.onItemClick(data.get(position), position);
                }
            }
        });
    }

    @Override
    public int getItemCount() {
        return data.size();
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        public View rootView;
        public TextView tvItemid;

        public ViewHolder(View rootView) {
            super(rootView);
            this.rootView = rootView;
            this.tvItemid = (TextView) rootView.findViewById(R.id.tv_itemid);
        }
    }

    public interface onItemClickListener {
        void onItemClick(int id, int positon);
    }
}

四自定义DividerItemDecoration

package com.landicorp.dependencelibrary.widget;

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.support.annotation.NonNull;
import android.support.v4.view.ViewCompat;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.LinearLayout;

/**
 * recycleView 的 分隔符 自定义
 */

public class DividerItemDecoration extends RecyclerView.ItemDecoration {
    public static final int HORIZONTAL = LinearLayout.HORIZONTAL;
    public static final int VERTICAL = LinearLayout.VERTICAL;

    private static final int[] ATTRS = new int[]{android.R.attr.listDivider};

    private Drawable mDivider;

    private int leftOffset = 0;

    /**
     * Current orientation. Either {@link #HORIZONTAL} or {@link #VERTICAL}.
     */
    private int mOrientation;

    private final Rect mBounds = new Rect();

    /**
     * Creates a divider {@link RecyclerView.ItemDecoration} that can be used with a
     * {@link LinearLayoutManager}.
     *
     * @param context     Current context, it will be used to access resources.
     * @param orientation Divider orientation. Should be {@link #HORIZONTAL} or {@link #VERTICAL}.
     */
    public DividerItemDecoration(Context context, int orientation) {
        this(context, orientation, 0);
    }

    /**
     * Creates a divider {@link RecyclerView.ItemDecoration} that can be used with a
     * {@link LinearLayoutManager}.
     *
     * @param context     Current context, it will be used to access resources.
     * @param orientation Divider orientation. Should be {@link #HORIZONTAL} or {@link #VERTICAL}.
     */
    public DividerItemDecoration(Context context, int orientation, int leftOffset) {
        this.leftOffset = leftOffset;
        final TypedArray a = context.obtainStyledAttributes(ATTRS);
        mDivider = a.getDrawable(0);
        a.recycle();
        setOrientation(orientation);
    }

    /**
     * Sets the orientation for this divider. This should be called if
     * {@link RecyclerView.LayoutManager} changes orientation.
     *
     * @param orientation {@link #HORIZONTAL} or {@link #VERTICAL}
     */
    public void setOrientation(int orientation) {
        if (orientation != HORIZONTAL && orientation != VERTICAL) {
            throw new IllegalArgumentException(
                    "Invalid orientation. It should be either HORIZONTAL or VERTICAL");
        }
        mOrientation = orientation;
    }

    /**
     * Sets the {@link Drawable} for this divider.
     *
     * @param drawable Drawable that should be used as a divider.
     */
    public void setDrawable(@NonNull Drawable drawable) {
        if (drawable == null) {
            throw new IllegalArgumentException("Drawable cannot be null.");
        }
        mDivider = drawable;
    }

    @Override
    public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
        if (parent.getLayoutManager() == null) {
            return;
        }
        if (mOrientation == VERTICAL) {
            drawVertical(c, parent);
        } else {
            drawHorizontal(c, parent);
        }
    }

    @SuppressLint("NewApi")
    private void drawVertical(Canvas canvas, RecyclerView parent) {
        canvas.save();
        final int left;
        final int right;
        if (parent.getClipToPadding()) {
            left = parent.getPaddingLeft() + leftOffset;
            right = parent.getWidth() - parent.getPaddingRight();
            canvas.clipRect(left, parent.getPaddingTop(), right,
                    parent.getHeight() - parent.getPaddingBottom());
        } else {
            left = leftOffset;
            right = parent.getWidth();
        }
        final int childCount = parent.getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View child = parent.getChildAt(i);
            if (child.getVisibility() == View.GONE)
                continue;
            parent.getDecoratedBoundsWithMargins(child, mBounds);
            final int bottom = mBounds.bottom + Math.round(ViewCompat.getTranslationY(child));
            final int top = bottom - mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(canvas);
        }
        canvas.restore();
    }

    @SuppressLint("NewApi")
    private void drawHorizontal(Canvas canvas, RecyclerView parent) {
        canvas.save();
        final int top;
        final int bottom;
        if (parent.getClipToPadding()) {
            top = parent.getPaddingTop();
            bottom = parent.getHeight() - parent.getPaddingBottom();
            canvas.clipRect(parent.getPaddingLeft(), top,
                    parent.getWidth() - parent.getPaddingRight(), bottom);
        } else {
            top = 0;
            bottom = parent.getHeight();
        }

        final int childCount = parent.getChildCount();
        for (int i = 0; i < childCount - 1; i++) {
            final View child = parent.getChildAt(i);
            parent.getLayoutManager().getDecoratedBoundsWithMargins(child, mBounds);
            final int right = mBounds.right + Math.round(ViewCompat.getTranslationX(child));
            final int left = right - mDivider.getIntrinsicWidth();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(canvas);
        }
        canvas.restore();
    }

    @Override
    public void getItemOffsets(Rect outRect, View view, RecyclerView parent,
                               RecyclerView.State state) {
        if (mOrientation == VERTICAL) {
            outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());
        } else {
            outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0);
        }
    }
}

一 xml

二 activity

三 adapter

四 自定义DividerItemDecoration

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