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RecyclerView源码解析(二)LinearLayoutManager绘制篇
LayoutManager是一个抽象类，系统提供了继承它的LinearLayoutManager，GridViewLayoutManager，StaggeredGridLayoutManager三种LayoutManager 首先来看看LinearLayoutManager是怎么实现绘制的。 确定锚点 所谓锚点，在这里就是指最先定位的那一个item，锚点相关信息在LinearLayoutManager中用AnchorInfo类表示 static class AnchorInfo { boolean mLayoutFromEnd; //是否从底部往上布局，在本文讨论的场景中，值都为false boolean mValid; //anchor信息是否设置完毕 ... } LinearLayoutManager minX, minY, maxX, maxY); setMeasuredDimension(mRecyclerView.mTempRect, widthSpec, heightSpec); } LinearLayoutManager
1.5K30发布于 2021-11-25 - 来自专栏韩曙亮的移动开发专栏
【RecyclerView】 三、RecyclerView 布局 ( 线性布局管理器 LinearLayoutManager )
文章目录 一、线性布局 1、线性布局管理器 LinearLayoutManager 2、垂直不翻转代码示例 3、水平翻转代码示例 二、完整代码示例 三、RecyclerView 相关资料 本篇博客主要讨论设置不同的布局管理器 使用代码创建 线性布局管理器 LinearLayoutManager , 推荐使用 LinearLayoutManager(Context context, @RecyclerView.Orientation int orientation, boolean reverseLayout) 构造函数 , 可以使用一行代码设置基本的 LinearLayoutManager 参数 ; 参数说明 : ① Context LinearLayoutManager(this, RecyclerView.VERTICAL, false); // 横向设置 , 翻转 LinearLayoutManager LinearLayoutManager(this, RecyclerView.VERTICAL, false); // 横向设置 , 翻转 //LinearLayoutManager
1.6K00编辑于 2023-03-28 - 来自专栏Android必知必会
Android必知必会 - RecyclerView 恢复上次滚动位置
条件： LinearLayoutManager linearLayoutManager = new LinearLayoutManager(mContext); linearLayoutManager.setOrientation (LinearLayoutManager.HORIZONTAL); // 水平，本文以此为例 linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL = null) { View leftView = linearLayoutManager.getChildAt(0); //获取可视的第一个view if (leftView 代码实现 LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext()); linearLayoutManager.setOrientation (LinearLayoutManager.HORIZONTAL); recyclerView.setLayoutManager(linearLayoutManager); onScrollListener
2.6K20发布于 2020-05-28 - 来自专栏移动开发专栏
No adapter attached; skipping layout 原因、解决办法
随意示范一下 LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL , false); mRecyclerView.setLayoutManager(linearLayoutManager); 上面用的是LinearLayoutManager的第二个构造方法 * @param reverseLayout When set to true, layouts from end to start. */ public LinearLayoutManager (mContext)); /** * Creates a vertical LinearLayoutManager * * @param context Current context, will be used to access resources. */ public LinearLayoutManager(Context context) {
2.2K10编辑于 2022-06-10 - 来自专栏字节流动
详细聊聊 RecyclerView 缓存机制
() -> LinearLayoutManager.fill() -> LinearLayoutManager.layoutChunk() -> LinearLayoutManager.LayoutState.next ()-> RecyclerView.Recycler.getViewForPosition() LinearLayoutManager.layoutForPredictiveAnimations()-> LinearLayoutManager.fill() -> LinearLayoutManager.layoutChunk() -> LinearLayoutManager.LayoutState.next ()-> RecyclerView.Recycler.getViewForPosition() LinearLayoutManager.scrollBy()-> LinearLayoutManager.fill () -> LinearLayoutManager.layoutChunk() -> LinearLayoutManager.LayoutState.next()-> RecyclerView.Recycler.getViewForPosition
3.4K43发布于 2021-04-23 - 来自专栏AndroidStudio初识
RecyclerView详解
1、 LinearLayoutManager 现行管理器，支持横向、纵向。 是用来做列表布局，也就是单列的列表 LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this); //设置为垂直布局，默认是垂直的（垂直：LinearLayoutManager.VERTICAL，水平：LinearLayoutManager.HORIZONTAL） linearLayoutManager.setOrientation 水平RecyclerView： //LinearLayoutManager是用来做列表布局，也就是单列的列表 LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this); //设置为垂直布局，默认是垂直的（垂直：LinearLayoutManager.VERTICAL，水平：LinearLayoutManager.HORIZONTAL
3.5K21发布于 2019-09-12 - 来自专栏Android Note
RecyclerView 分页功能
layoutManager; public PaginationScrollListener(LinearLayoutManager layoutManager) { this.layoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false); rv.setLayoutManager(linearLayoutManager linearLayoutManager; RecyclerView rv; ProgressBar progressBar; // 分页开始的索引（0是我们的第一页） = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false); rv.setLayoutManager(linearLayoutManager 但是现在，它的构造函数只支持LinearLayoutManager。
3.4K30发布于 2018-07-02 - 来自专栏移动开发
结合 MultiType 实现加载更多
linearLayoutManager = (LinearLayoutManager) recyclerView.getLayoutManager(); mScrollListener private Items mItems; private final LoadMore mLoadMore = new LoadMore(); private LinearLayoutManager MultiTypeAdapter mMultiTypeAdapter; ScrollListener(MultiTypeAdapter multiTypeAdapter, Items datas, LinearLayoutManager linearLayoutManager, OnLoadMoreListener onLoadMoreListener) { mItems = datas; mMultiTypeAdapter = multiTypeAdapter; this.mLinearLayoutManager = linearLayoutManager;
1.8K20发布于 2018-10-18 - 来自专栏全栈程序员必看
Recyclerview 刷新「建议收藏」
rv_shop_bag_list}, adapter:com.lpf.demo.order.adapter.MyAdapter@5f994d1, layout:android.support.v7.widget.LinearLayoutManager widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5854) at android.support.v7.widget.LinearLayoutManager $LayoutState.next(LinearLayoutManager.java:2230) at android.support.v7.widget.LinearLayoutManager.layoutChunk (LinearLayoutManager.java:1557) at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java :1517) at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java
1.4K30编辑于 2022-11-15 - 来自专栏非著名程序员
使用 RecyclerView 实现 Gallery 画廊效果，并控制 Item 停留位置
代码如下： LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL , false); recyclerView.setLayoutManager(linearLayoutManager); new LinearSnapHelper(). attachToRecyclerView RecyclerView.LayoutManager layoutManager, OrientationHelper helper) { if (layoutManager instanceof LinearLayoutManager ) { int firstChild = ((LinearLayoutManager) layoutManager).findFirstVisibleItemPosition(); int lastChild = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition(); if (firstChild == RecyclerView.NO_POSITION
4.5K70发布于 2018-02-09 - 来自专栏Android&Java技术
Attempt to write to field 'int android.support.v7.widget.RecyclerView$ViewHolder.mItemViewType' on a
widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4967) at android.support.v7.widget.LinearLayoutManager $LayoutState.next(LinearLayoutManager.java:2029) at android.support.v7.widget.GridLayoutManager.layoutChunk (GridLayoutManager.java:541) at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java :1377) at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:
1.1K30发布于 2020-02-27 - 来自专栏向治洪
RecyclerView 实现gallery画廊效果
import android.app.Activity; import android.os.Bundle; import android.support.v7.widget.LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this); linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL ); mRecyclerView.setLayoutManager(linearLayoutManager); //设置适配器 mAdapter = new linearLayoutManager = new LinearLayoutManager(this); linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL ); mRecyclerView.setLayoutManager(linearLayoutManager); mAdapter = new GalleryAdapter
3.2K50发布于 2018-02-01 - 来自专栏风吹杨柳
Android-UI布局---RecyclerView学习（二）利用它做的相册集效果
R.drawable.l)); mRecyclerView = (MyRecyclerView) findViewById(R.id.id_recyclerview_horizontal); LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this); linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL ); mRecyclerView.setLayoutManager(linearLayoutManager); mAdapter = new GalleryAdapter(this, mDatas linearLayoutManager = new LinearLayoutManager(this); linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL );//设置方向水平 mRecyclerView.setLayoutManager(linearLayoutManager); mAdapter = new GalleryAdapter(
1.7K30发布于 2019-07-08 - 来自专栏Android知识点总结
1-VII-RecyclerView基本使用
创建布局管理器 mLlm = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false); //4.!!! )); mRecyclerView.addItemDecoration(//竖线 new RecycleViewDivider(this,LinearLayoutManager.VERTICAL 或LinearLayoutManager.HORIZONTAL private static final int[] ATTRS = new int[]{android.R.attr.listDivider = LinearLayoutManager.VERTICAL && orientation ! = LinearLayoutManager.HORIZONTAL) { throw new IllegalArgumentException("请输入正确的参数！")
93630发布于 2018-09-29 - 来自专栏Android小菜鸡
构建BaseRecyclerAdapter，RecyclerView其实很简单
package com.wusy.wusylibrary.base; import android.content.Context; import android.support.v7.widget.LinearLayoutManager firstVisibleItem, visibleItemCount, totalItemCount; private int currentPage = 1; private LinearLayoutManager mLinearLayoutManager; public LoadMoreRecyclerOnScrollListener(LinearLayoutManager linearLayoutManager ) { this.mLinearLayoutManager = linearLayoutManager; } @Override
76030发布于 2018-09-06 - 来自专栏胡飞洋的Android进阶
曝光埋点方案：recyclerView中的item曝光逻辑实现
RecyclerView.LayoutManager manager = mRecyclerView.getLayoutManager(); if (manager instanceof LinearLayoutManager ) { LinearLayoutManager linearLayoutManager = (LinearLayoutManager) manager; range = findRangeLinear(linearLayoutManager); orientation = linearLayoutManager.getOrientation ) { LinearLayoutManager linearLayoutManager = (LinearLayoutManager) manager; range = findRangeLinear(linearLayoutManager); orientation = linearLayoutManager.getOrientation
6.4K10发布于 2020-07-23 - 来自专栏全栈程序员必看
Android物联网应用程序开发（智慧园区）—— 图片预览界面
android.os.Bundle; import android.support.v7.widget.DividerItemDecoration; import android.support.v7.widget.LinearLayoutManager R.layout.activity_main); recyclerView = findViewById(R.id.recycler_view); //创建线性布局管理器，方向垂直 LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false); // recyclerView设置布局管理器 recyclerView.setLayoutManager(linearLayoutManager); MonitorAdapter
1.3K10编辑于 2022-06-25 - 来自专栏AndroidTv
关于RecyclerView你知道的不知道的都在这了（上）前言目录正文
1.1 LinearLayoutManager 线性布局，用它可以来实现横竖自由切换的线性布局，先来看看它的构造函数： public class LinearLayoutManager extends 竖直LinearLayoutManager示例.png 在 Tv 应用中，这种竖直方向的 LinearLayoutManager 使用场景大多都是用于显示菜单项，使用频率并不是特别高，但在手机应用中，这种的使用频率算是特别高的了 layoutManager = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false); mRecyclerView.setLayoutManager 其实想想也很容易理解，GridLayoutManager 是继承自 LinearLayoutManager，只是在它基础上补充了 spanCount 概念，滑动的实现还是延用 LinearLayoutManager setSpanCount() 通过构造函数指定了 spanCount 后也还可以继续通过该方法进行修改 LinearLayoutManager 的方法 由于是继承关系，所有 LinearLayoutManager
3.6K60发布于 2018-06-13 - 来自专栏全栈程序员必看
RecyclerView0基于使用
R.layout.activity_main); recyclerView = (RecyclerView) findViewById(R.id.recyclerView); //LinearLayoutManager 能够自己定义实现不同的动画效果和布局效果 //这里设置为LinearLayoutManager.HORIZONTAL变成为了一个能够横向滑动的ListView，赞不赞？ LinearLayoutManager layoutManager = new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false); RecyclerView通过(RecyclerView) findViewById(R.id.recyclerView)初始化之后，不仅要像ListView一样要放入Adapter进行数据和布局的适配，并且还要额外加入一个LinearLayoutManager 通过自己定义LinearLayoutManager也能够实现不同的动画效果，和移动效果。 RecyclerView的Adapter和ListView的Adapter也是不同的。
35620编辑于 2022-01-11 - 来自专栏Android开发与分享
【Android】RecyclerView的使用
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerview); //设置为Listview样式 LinearLayoutManager layoutManager = new LinearLayoutManager(this); recyclerView.setLayoutManager(layoutManager); RecylcerView设置adapter recyclerView.setAdapter(adapter); 这里将Recycler设置成了ListView样式，若需要GridView样式只需要将 LinearLayoutManager layoutManager = new LinearLayoutManager(this); 改为 int arrayNum = 2;//GridView样式时的列数 GridLayoutManager ); //横向显示 layoutManager.setOrientation(LinearLayoutManager.HORIZONTAL); 完成一次RecyclerView的简单使用，来看看效果
1.5K50发布于 2018-05-18
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