本文实例为大家分享了RecylerView实现流布局的具体代码,供大家参考,具体内容如下
第一步:添加依赖
代码语言:javascript复制compile 'com.android.support:appcompat-v7:25.3.1'
compile 'com.android.support:design:25.3.1'
compile 'com.android.support:recyclerview-v7:25.3.1'
compile 'com.android.support:cardview-v7:25.3.1'
compile 'com.github.bumptech.glide:glide:3.7.0'
因为加载的是网络图片,所以采用的是Glide图片加载框架。
第二步:recylerview布局 (刷新需要添加SwipeRefreshLayout)
代码语言:javascript复制<?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="com.example.wangchang.testpalette.MainActivity"
<android.support.v7.widget.RecyclerView
android:id="@ id/recylerview"
android:padding="4dp"
android:layout_width="match_parent"
android:layout_height="match_parent" /
</RelativeLayout
第三步:RecylerView初始化
代码语言:javascript复制 recyclerView = (RecyclerView) findViewById(R.id.recylerview);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL));
recyclerView.setAdapter(adapter = new DemoAdapter());
adapter.replaceAll(getData());
Demo中:
代码语言:javascript复制final StaggeredGridLayoutManager layoutManager = new StaggeredGridLayoutManager(2,
StaggeredGridLayoutManager.VERTICAL);
mRecyclerView.setLayoutManager(layoutManager);
mMeizhiListAdapter = new MeizhiListAdapter(getContext(), mMeizhiList);
mRecyclerView.setAdapter(mMeizhiListAdapter);
mRecyclerView.addOnScrollListener(getOnBottomListener(layoutManager));//滚动预先加载数据
mMeizhiListAdapter.setOnMeizhiTouchListener(getOnMeizhiTouchListener());//点击事件
这里主要是 recyclerView.setLayoutManager(new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL)); 设置StaggeredGridLayoutManager布局管理器,参数分别是列数,方向。
第四步:适配器的实现
代码语言:javascript复制package com.hsy.utils.utilsdemo.adapter;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import com.hsy.utils.utilsdemo.R;
import com.hsy.utils.utilsdemo.module.home.Daily;
import com.hsy.utils.utilslibrary.utils.GlideUtils;
import java.util.List;
/**
* Created by drakeet on 6/20/15.
*/
public class MeizhiListAdapter
extends RecyclerView.Adapter<MeizhiListAdapter.ViewHolder {
public static final String TAG = "MeizhiListAdapter";
private List<Daily mList;
private Context mContext;
private OnMeizhiTouchListener mOnMeizhiTouchListener;
public MeizhiListAdapter(Context context, List<Daily meizhiList) {
mList = meizhiList;
mContext = context;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int i) {
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item_meizhi, parent, false);
return new ViewHolder(v);
}
@Override
public void onBindViewHolder(final ViewHolder viewHolder, final int position) {
Daily meizhi = mList.get(position);
int limit = 48;
String text = "";
if (meizhi != null && meizhi.getTitle() != null) {
text = meizhi.getTitle().length() limit ? meizhi.getTitle().substring(0, limit)
"..." : meizhi.getTitle();
}
viewHolder.meizhi = meizhi;
viewHolder.titleView.setText(text);
viewHolder.card.setTag(meizhi.getDesc());
//加载图片
GlideUtils.displayImage(mContext, meizhi.getImgUrl(), viewHolder.meizhiView);
}
@Override
public void onViewRecycled(ViewHolder holder) {
super.onViewRecycled(holder);
}
@Override
public int getItemCount() {
return mList != null ? mList.size() : 0;
}
public void setOnMeizhiTouchListener(OnMeizhiTouchListener onMeizhiTouchListener) {
this.mOnMeizhiTouchListener = onMeizhiTouchListener;
}
class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
ImageView meizhiView;
TextView titleView;
View card;
Daily meizhi;
public ViewHolder(View itemView) {
super(itemView);
card = itemView;
meizhiView = (ImageView) itemView.findViewById(R.id.meizhi);
titleView = (TextView) itemView.findViewById(R.id.title);
meizhiView.setOnClickListener(this);
card.setOnClickListener(this);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
mOnMeizhiTouchListener.onTouch(v, meizhiView, card, meizhi);
}
}
}
每个布局的样式item_layout
代码语言:javascript复制<?xml version="1.0" encoding="utf-8"?
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_marginTop="5dp"
<LinearLayout
android:id="@ id/meizhi_card"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clickable="true"
android:orientation="vertical"
<!-- android:background="@drawable/bg_card"--
<ImageView
android:id="@ id/meizhi"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:scaleType="fitXY" /
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/selectableItemBackground"
android:orientation="horizontal"
android:paddingBottom="10dp"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:paddingTop="10dp"
<TextView
android:id="@ id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
tools:text="Title" /
</LinearLayout
</LinearLayout
</android.support.v7.widget.CardView
下面来说实现动态设置图片大小方式
代码语言:javascript复制ivImage.getContext()).getWindowManager().getDefaultDisplay().getWidth();
ViewGroup.LayoutParams params = ivImage.getLayoutParams();
//设置图片的相对于屏幕的宽高比
params.width = width/3;
params.height = (int) (200 Math.random() * 400) ;
ivImage.setLayoutParams(params);
这里是获取屏幕宽度,因为是三列,所以设置图片宽度取屏幕三分之一。
demo源码:参考UtilsDemo中的消息
以上就是本文的全部内容,希望对大家的学习有所帮助。