RecycleView + SwipeRefreshLayout
2016-05-14 本文已影响861人
菜鸟_一枚
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'
}
三种排版方式的menu
刷新
刷新加载数据后
水平排版布局
GridView排版布局
其中的一种动画效果
该项目的github开源地址:
[该项目github地址] : https://github.com/wuyinlei/RecycleView-SwipeRefreshLayou
小弟也是刚刚接触,并没有什么独特见解,更不要说精通了哈,学习就是要长时间的积累。。。。
加油!!!
当然了哈,可以换成RecycleView + MaterialRefreshLayout使用,可以实现下拉刷新,上拉加载等任务,MaterialRefreshLayout项目开源地址:
MaterialRefreshLayout