RecycleView + SwipeRefreshLayout

作者: 菜鸟_一枚 | 来源:发表于2016-05-14 17:34 被阅读861次

在这里就不具体的介绍RecycleView的用法和简介了，如果想了解更多关于RecycleView的更多介绍，可以看下我的另一篇blog，RecycleView的简单介绍：
http://blog.csdn.net/wuyinlei/article/details/50593747

在这里就简单的介绍些SwipeRefreshLayout吧：
SwipeRefreshLayout是Google官方更新的一个widget，可以实现下拉刷新的效果，该控件集成子ViewGroup在support-v4兼容包下，不过我们想要使用，必须support library的版本在19.1以上

基本使用方法：

1、setOnRefreshListener（OnRefreshListener）：添加下拉刷新监听器
2、setRefreshing（boolean）：显示或者隐藏刷新进度条
3、isRefreshing()：检查是否处于刷新状态
4、setColorSchemeResources（）：设置进度条的颜色主题（最多四个）

下面就来实例代码吧，用的有下拉刷新哦：

package com.example.ruolan.recycleview;

import android.os.Bundle;
import android.os.Handler;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;

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

public class MainActivity extends AppCompatActivity {

    private RecyclerView mRecyclerView;

    private SwipeRefreshLayout mLayout;

    private List<String> datas = new ArrayList<>();

    private MyAdapter mAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mLayout = (SwipeRefreshLayout) this.findViewById(R.id.refreshLayout);
        mRecyclerView = (RecyclerView) this.findViewById(R.id.recyclerView);
        mAdapter = new MyAdapter(datas);
        mRecyclerView.setAdapter(mAdapter);
        //下面可以自己设置排版方式
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        //mRecyclerView.setLayoutManager(new GridLayoutManager(this,4));
        //设置分割线
        mRecyclerView.addItemDecoration(new DividerItemDecoration(this, DividerItemDecoration.VERTICAL_LIST));

        //下面一行如果不写也是会自动调用的
        mRecyclerView.setItemAnimator(new DefaultItemAnimator());
        mAdapter.setOnItemListener(new MyAdapter.OnItemClickListener() {
            @Override
            public void onClick(View v, int position, String city) {
                Toast.makeText(MainActivity.this, "你好", Toast.LENGTH_SHORT).show();
            }
        });
        //RecycleView的事件监听
        //初始化数据
        initDatas();
        initRefreshLayout();
    }

    private void initRefreshLayout() {
        //设置刷新的颜色
        mLayout.setColorSchemeResources(
                android.R.color.background_dark,
                android.R.color.holo_red_dark,
                android.R.color.holo_green_dark,
                android.R.color.holo_orange_dark);
        //拖动多长的时候开始刷新
        mLayout.setDistanceToTriggerSync(100);

        mLayout.setProgressBackgroundColorSchemeColor(getResources().getColor(R.color.item_press));

        //设置大小
        mLayout.setSize(SwipeRefreshLayout.LARGE);
        //刷新监听器
        mLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        for (int i = 0; i <= 10; i++){
                            mAdapter.addData(i,"new City " + i);
                        }
                        //通知刷新
                        mAdapter.notifyItemRangeChanged(0,10);
                        mRecyclerView.scrollToPosition(5);

                        //完成后调用完成的方法
                        mLayout.setRefreshing(false);
                    }
                },3000);
            }
        });
    }

    private void initDatas() {

        datas.add("New York");
        datas.add("Bei Jing");
        datas.add("Boston");
        datas.add("London");
        datas.add("San Francisco");
        datas.add("Chicago");
        datas.add("Shang Hai");
        datas.add("Tian Jin");
        datas.add("Zheng Zhou");
        datas.add("Hang Zhou");
        datas.add("Guang Zhou");
        datas.add("Fu Gou");
        datas.add("Zhou Kou");

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.id_action_add:
                mAdapter.addData(0, "new City");
                break;
            case R.id.id_action_delete:
                mAdapter.removeData(1);
                break;
            case R.id.id_action_gridview:
                mRecyclerView.setLayoutManager(new GridLayoutManager(this, 4));
                break;
            case R.id.id_action_listview:
                mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
                break;
            case R.id.id_action_horizontalGridView:
                mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(4, StaggeredGridLayoutManager.HORIZONTAL));
                break;
        }


        return super.onOptionsItemSelected(item);
    }
}

package com.example.ruolan.recycleview;

import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.List;

/**
 * Created by ruolan on 2015/11/11.
 */
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {

    private List<String> mDatas;

    private LayoutInflater mInflater;

    private OnItemClickListener mListener;

    public void setOnItemListener(OnItemClickListener listener){
        mListener = listener;
    }

    public MyAdapter(List<String> datas){
        mDatas = datas;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        //读取布局文件
        mInflater = LayoutInflater.from(parent.getContext());
        View view = mInflater.inflate(R.layout.itme,parent,false);


        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        holder.mTextView.setText(mDatas.get(position));
    }

    public void addData(int position,String city){
        mDatas.add(position,city);
        notifyItemInserted(position);
    }

    public void removeData(int position){
        mDatas.remove(position);
        notifyItemRemoved(position);
    }


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

    class ViewHolder extends RecyclerView.ViewHolder {

        private TextView mTextView;

        public ViewHolder(View itemView) {
            super(itemView);
            mTextView = (TextView) itemView.findViewById(R.id.text);
            mTextView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (mListener != null){
                        mListener.onClick(v,getLayoutPosition(),mDatas.get(getLayoutPosition()));
                    }
                }
            });
        }
    }

    //RecycleView的事件监听
    interface  OnItemClickListener{
        //自己定义
        void onClick(View v,int position,String city);
    }
}

package com.example.ruolan.recycleview;

import android.graphics.Canvas;
import android.graphics.Rect;
import android.support.v7.widget.RecyclerView;
import android.view.View;

/**
 * Created by ruolan on 2015/11/11.
 */
public class MyItemDecoration extends RecyclerView.ItemDecoration{
    /**
     * 渲染itme的之前调用
     * @param c
     * @param parent
     * @param state
     */
    @Override
    public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
        super.onDraw(c, parent, state);
    }

    /**
     * 渲染完成后调用
     * @param c
     * @param parent
     * @param state
     */
    @Override
    public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {
        super.onDrawOver(c, parent, state);
    }

    /**
     *
     * @param outRect
     * @param view
     * @param parent
     * @param state
     */
    @Override
    public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
        super.getItemOffsets(outRect, view, parent, state);
    }
}

下面的这两个用的是网上的找到。

package com.example.ruolan.recycleview;

/**
 * Created by ruolan on 2015/11/11.
 */
/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

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.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;

/**
 * This class is from the v7 samples of the Android SDK. It's not by me!
 * <p/>
 * See the license above for details.
 */
public class DividerItemDecoration extends RecyclerView.ItemDecoration
{

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

    public static final int HORIZONTAL_LIST = LinearLayoutManager.HORIZONTAL;

    public static final int VERTICAL_LIST = LinearLayoutManager.VERTICAL;



    private Drawable mDivider;

    private int mOrientation;

    public DividerItemDecoration(Context context, int orientation)
    {
        final TypedArray a = context.obtainStyledAttributes(ATTRS);
        mDivider = a.getDrawable(0);
        a.recycle();
        setOrientation(orientation);
    }

    public void setOrientation(int orientation)
    {
        if (orientation != HORIZONTAL_LIST && orientation != VERTICAL_LIST)
        {
            throw new IllegalArgumentException("invalid orientation");
        }
        mOrientation = orientation;
    }

    @Override
    public void onDraw(Canvas c, RecyclerView parent)
    {
        Log.v("recyclerview - itemdecoration", "onDraw()");
        if (mOrientation == VERTICAL_LIST) {
            drawVertical(c, parent);
        } else {
            drawHorizontal(c, parent);
        }
    }

    public void drawVertical(Canvas c, RecyclerView parent)
    {
        final int left = parent.getPaddingLeft();
        final int right = parent.getWidth() - parent.getPaddingRight();

        final int childCount = parent.getChildCount();

        for (int i = 0; i < childCount; i++)
        {
            final View child = parent.getChildAt(i);
            android.support.v7.widget.RecyclerView v = new android.support.v7.widget.RecyclerView(
                    parent.getContext());
            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                    .getLayoutParams();
            final int top = child.getBottom() + params.bottomMargin;
            final int bottom = top + mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }

    public void drawHorizontal(Canvas c, RecyclerView parent)
    {
        final int top = parent.getPaddingTop();
        final int bottom = parent.getHeight() - parent.getPaddingBottom();

        final int childCount = parent.getChildCount();
        for (int i = 0; i < childCount; i++)
        {
            final View child = parent.getChildAt(i);
            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                    .getLayoutParams();
            final int left = child.getRight() + params.rightMargin;
            final int right = left + mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }

    @Override
    public void getItemOffsets(Rect outRect, int itemPosition,
                               RecyclerView parent)
    {
        if (mOrientation == VERTICAL_LIST)
        {
            outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());
        } else
        {
            outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0);
        }
    }

}

下面的代码是用来布局Grid布局方式

package com.example.ruolan.recycleview;

/**
 * Created by ruolan on 2015/11/11.
 */
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.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.RecyclerView.LayoutManager;
import android.support.v7.widget.RecyclerView.State;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.View;


public class DividerGridItemDecoration extends RecyclerView.ItemDecoration
{

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

    public DividerGridItemDecoration(Context context)
    {
        final TypedArray a = context.obtainStyledAttributes(ATTRS);
        mDivider = a.getDrawable(0);
        a.recycle();
    }

    @Override
    public void onDraw(Canvas c, RecyclerView parent, State state)
    {

        drawHorizontal(c, parent);
        drawVertical(c, parent);

    }

    private int getSpanCount(RecyclerView parent)
    {
        // 列数
        int spanCount = -1;
        LayoutManager layoutManager = parent.getLayoutManager();
        if (layoutManager instanceof GridLayoutManager)
        {

            spanCount = ((GridLayoutManager) layoutManager).getSpanCount();
        } else if (layoutManager instanceof StaggeredGridLayoutManager)
        {
            spanCount = ((StaggeredGridLayoutManager) layoutManager)
                    .getSpanCount();
        }
        return spanCount;
    }

    public void drawHorizontal(Canvas c, RecyclerView parent)
    {
        int childCount = parent.getChildCount();
        for (int i = 0; i < childCount; i++)
        {
            final View child = parent.getChildAt(i);
            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                    .getLayoutParams();
            final int left = child.getLeft() - params.leftMargin;
            final int right = child.getRight() + params.rightMargin
                    + mDivider.getIntrinsicWidth();
            final int top = child.getBottom() + params.bottomMargin;
            final int bottom = top + mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }

    public void drawVertical(Canvas c, RecyclerView parent)
    {
        final int childCount = parent.getChildCount();
        for (int i = 0; i < childCount; i++)
        {
            final View child = parent.getChildAt(i);

            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                    .getLayoutParams();
            final int top = child.getTop() - params.topMargin;
            final int bottom = child.getBottom() + params.bottomMargin;
            final int left = child.getRight() + params.rightMargin;
            final int right = left + mDivider.getIntrinsicWidth();

            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }

    private boolean isLastColum(RecyclerView parent, int pos, int spanCount,
                                int childCount)
    {
        LayoutManager layoutManager = parent.getLayoutManager();
        if (layoutManager instanceof GridLayoutManager)
        {
            if ((pos + 1) % spanCount == 0)// 如果是最后一列，则不需要绘制右边
            {
                return true;
            }
        } else if (layoutManager instanceof StaggeredGridLayoutManager)
        {
            int orientation = ((StaggeredGridLayoutManager) layoutManager)
                    .getOrientation();
            if (orientation == StaggeredGridLayoutManager.VERTICAL)
            {
                if ((pos + 1) % spanCount == 0)// 如果是最后一列，则不需要绘制右边
                {
                    return true;
                }
            } else
            {
                childCount = childCount - childCount % spanCount;
                if (pos >= childCount)// 如果是最后一列，则不需要绘制右边
                    return true;
            }
        }
        return false;
    }

    private boolean isLastRaw(RecyclerView parent, int pos, int spanCount,
                              int childCount)
    {
        LayoutManager layoutManager = parent.getLayoutManager();
        if (layoutManager instanceof GridLayoutManager)
        {
            childCount = childCount - childCount % spanCount;
            if (pos >= childCount)// 如果是最后一行，则不需要绘制底部
                return true;
        } else if (layoutManager instanceof StaggeredGridLayoutManager)
        {
            int orientation = ((StaggeredGridLayoutManager) layoutManager)
                    .getOrientation();
            // StaggeredGridLayoutManager 且纵向滚动
            if (orientation == StaggeredGridLayoutManager.VERTICAL)
            {
                childCount = childCount - childCount % spanCount;
                // 如果是最后一行，则不需要绘制底部
                if (pos >= childCount)
                    return true;
            } else
            // StaggeredGridLayoutManager 且横向滚动
            {
                // 如果是最后一行，则不需要绘制底部
                if ((pos + 1) % spanCount == 0)
                {
                    return true;
                }
            }
        }
        return false;
    }

    @Override
    public void getItemOffsets(Rect outRect, int itemPosition,
                               RecyclerView parent)
    {
        int spanCount = getSpanCount(parent);
        int childCount = parent.getAdapter().getItemCount();
        if (isLastRaw(parent, itemPosition, spanCount, childCount))// 如果是最后一行，则不需要绘制底部
        {
            outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0);
        } else if (isLastColum(parent, itemPosition, spanCount, childCount))// 如果是最后一列，则不需要绘制右边
        {
            outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());
        } else
        {
            outRect.set(0, 0, mDivider.getIntrinsicWidth(),
                    mDivider.getIntrinsicHeight());
        }
    }
}

来布局文件看看，其实也是很简单的哈;
activity_main.xml文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:tools="http://schemas.android.com/tools"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                tools:context=".MainActivity">
<android.support.v4.widget.SwipeRefreshLayout
    android:id="@+id/refreshLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        >
    </android.support.v7.widget.RecyclerView>
</android.support.v4.widget.SwipeRefreshLayout>



</RelativeLayout>

item.xml文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:background="@drawable/selector_itme_bg"
              android:gravity="center"
              android:padding="20dp"
    >

    <TextView
        android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_gravity="center"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:textColor="#fff"
        android:textSize="20dp"
        android:padding="20dp"
        android:text="1" />

</LinearLayout>

build.graddle文件中添加的依赖

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.1.0'
    compile 'com.android.support:design:23.1.0'
    compile 'com.android.support:recyclerview-v7:23.0.1'
}