前言

在用到RecycleView的时候，通常会写一个adapter，然后是一堆的垃圾代码，为了让adapter用起来更简便，代码更少，今天介绍一个强大的adapter库------BRVAH

今天只是对此adapter对一般的点击事件及展示做一个介绍，更多使用方法，请参考上面链接

今天涉及知识：

BRVAH 框架配置

对界面展示及基本点击事件做简单"封装"

在activity中使用

一.BRVAH 框架配置

BRVAH的配置比一般的库配置要多出一步，就是配置maven。

1.1在project的build.gradle中配置maven

在project的build.gradle的allprojects下的repositories中配置,代码如下：

maven { url "https://jitpack.io" }

具体代码如下：

//在这里引入config.gradle

apply from:"config.gradle"

buildscript {

repositories {

google()

jcenter()

}

dependencies {

classpath 'com.android.tools.build:gradle:3.0.0'

// NOTE: Do not place your application dependencies here; they belong

// in the individual module build.gradle files

}

}

allprojects {

repositories {

google()

jcenter()

maven { url "https://jitpack.io" }

}

}

task clean(type: Delete) {

delete rootProject.buildDir

}

这里需要注意的有两点：

配置的是project的build.gradle,而不是app module的build.gradle

maven写在allprojects-->repositories 下，而不是buildscript -->repositories 下，切记！

1.2在app module的build.gradle中引入库依赖：

//我使用时，最新版本为 2.9.34

compile 'com.github.CymChad:BaseRecyclerViewAdapterHelper:2.9.34'

自此，BRVAH库配置完毕

二.写一个父类Adapter以供一般的adapter使用，adapter名称问为ComAdapter

注：此adapter只专注于一般的展示及点击事件，和简单header和footer的添加，若有比较复杂的用途，需要自己重新写一个adapter，此ComAdapter并不适用于复杂情况

ComAdapter代码如下：

package com.adapter;

import android.content.Context;

import android.support.v7.widget.LinearLayoutManager;

import android.support.v7.widget.RecyclerView;

import android.view.LayoutInflater;

import android.view.View;

import com.chad.library.adapter.base.BaseQuickAdapter;

import com.chad.library.adapter.base.BaseViewHolder;

import com.chad.library.adapter.base.animation.BaseAnimation;

import java.util.List;

/**

* Title:RecyclerView适配器基类

* Description:

*

* Created by pei

* Date: 2017/12/29

*/

public abstract class ComAdapter extends BaseQuickAdapter {

protected Context mContext;

protected ListmData;

protected int mItemViewId;//item布局id

protected View mHeaderView;

protected View mFooterView;

public ComAdapter(int itemViewId,Listdata,Context context) {

super(itemViewId, data);

this.mItemViewId=itemViewId;

this.mContext=context;

this.mData=data;

}

@Override

protected void convert(BaseViewHolder viewHolder, T t) {

initView(viewHolder,t);

initData(viewHolder,t);

setListener(viewHolder,t);

}

protected abstract void initView(BaseViewHolder viewHolder, T t);

protected abstract void initData(BaseViewHolder viewHolder, T t);

protected abstract void setListener(BaseViewHolder viewHolder, T t);

/**获取position，当添加有header或footer要注意改变**/

public int getPosition(BaseViewHolder viewHolder){

return viewHolder.getLayoutPosition();

}

/**获取headerView**/

protected View getHeaderView(int headerViewId) {

if(mContext!=null){

mHeaderView=LayoutInflater.from(mContext).inflate(headerViewId, null);

}

return mHeaderView;

}

/**获取footerView**/

protected View getFooterView(int footerViewId) {

if (mContext != null&&mFooterView==null) {

mFooterView = LayoutInflater.from(mContext).inflate(footerViewId, null);

}

return mFooterView;

}

/**添加headerView**/

public void addHeaderView(int headerViewId){

addHeaderView(getHeaderView(headerViewId));

};

/**添加footerView**/

public void addFooterView(int footerViewId){

addFooterView(getFooterView(footerViewId));

}

/**设置RecyclerView**/

public void setRecyclerManager(RecyclerView recyclerView){

LinearLayoutManager layoutManager=new LinearLayoutManager(mContext);

layoutManager.setSmoothScrollbarEnabled(true);

layoutManager.setAutoMeasureEnabled(true);

recyclerView.setNestedScrollingEnabled(false);

recyclerView.setHasFixedSize(true);

recyclerView.setLayoutManager(layoutManager);

recyclerView.setAdapter(this);

openLoadAnimation();//默认adapter渐现效果

}

/**adapter渐现动画**/

public void openAlphaAnimation(){

openLoadAnimation(BaseQuickAdapter.ALPHAIN);

}

/**adapter缩放动画**/

public void openScaleAnimation(){

openLoadAnimation(BaseQuickAdapter.SCALEIN );

}

/**adapter从下到上动画**/

public void openBottomAnimation(){

openLoadAnimation(BaseQuickAdapter.SLIDEIN_BOTTOM );

}

/**adapter从左到右动画**/

public void openLeftAnimation(){

openLoadAnimation(BaseQuickAdapter.SLIDEIN_LEFT );

}

/**adapter从右到左动画**/

public void openRightAnimation(){

openLoadAnimation(BaseQuickAdapter.SLIDEIN_RIGHT );

}

/**自定义动画**/

public void openLoadAnimation(BaseAnimation animation){

}

}

三.写自己的适配器NameAdapter，继承于ComAdapter

package com.adapter;

import android.content.Context;

import android.widget.TextView;

import com.brvahdemo.R;

import com.chad.library.adapter.base.BaseViewHolder;

import java.util.List;

/**

* Title:

* Description:

*

* Created by pei

* Date: 2017/12/29

*/

public class NameAdapterextends ComAdapter {

private TextView mTvName;

public NameAdapter(List data, Context context){

super(R.layout.item_layout,data,context);

}

@Override

protected void initView(BaseViewHolder viewHolder, Object o) {

mTvName=viewHolder.getView(R.id.tv_name);

}

@Override

protected void initData(BaseViewHolder viewHolder, Object o) {

mTvName.setText(o.toString());

}

@Override

protected void setListener(BaseViewHolder viewHolder, Object o) {

//mTvName点击事件

viewHolder.addOnClickListener(mTvName.getId());

}

}

涉及到的item_layout.xml布局代码很简单，如下：

android:layout_width="match_parent"

android:layout_height="60dp"

android:orientation="vertical"

android:gravity="center_vertical"

android:background="#ff0000">

android:id="@+id/tv_name"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginTop="2dp"

android:layout_marginBottom="2dp"

android:background="#0000ff"/>

四.在MainActivity中的简单使用

4.1先给出MainActivity的布局activity_main.xml,代码很简单，只做展示

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context="com.brvahdemo.MainActivity"

android:orientation="vertical">

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Hello World!"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintLeft_toLeftOf="parent"

app:layout_constraintRight_toRightOf="parent"

app:layout_constraintTop_toTopOf="parent" />

android:id="@+id/recycler_view"

android:layout_width="match_parent"

android:layout_height="wrap_content"/>

4.2 MainActivity中使用代码

废话不多说，直接上代码是王道

package com.brvahdemo;

import android.support.v7.widget.RecyclerView;

import android.view.View;

import android.widget.Toast;

import com.adapter.NameAdapter;

import com.base.AppActivity;

import com.chad.library.adapter.base.BaseQuickAdapter;

import java.util.Arrays;

import java.util.List;

import butterknife.BindView;

public class MainActivity extends AppActivity {

@BindView(R.id.recycler_view)

RecyclerView mRecyclerView;

private ListmNameList;

private NameAdapter mNameAdapter;

@Override

public int getContentViewId() {

return R.layout.activity_main;

}

@Override

protected void initData() {

mNameList= Arrays.asList("小明","小红","小芳","小花","小海","小林","小叶","小虎","小柔");

mNameAdapter=new NameAdapter(mNameList,mContext);//初始化NameAdapter

mNameAdapter.setRecyclerManager(mRecyclerView);//设置RecyclerView特性

mNameAdapter.addHeaderView(R.layout.item_header);//添加header

mNameAdapter.addFooterView(R.layout.item_footer);//添加footer

mNameAdapter.openLeftAnimation();//设置加载动画

}

@Override

protected void setListener() {

//item點擊事件

mNameAdapter.setOnItemClickListener(new BaseQuickAdapter.OnItemClickListener() {

@Override

public void onItemClick(BaseQuickAdapter adapter, View view, int position) {

Toast.makeText(MainActivity.this, "onItemLongClick" + position, Toast.LENGTH_SHORT).show();

}

});

//子空控件点击事件

mNameAdapter.setOnItemChildClickListener(new BaseQuickAdapter.OnItemChildClickListener() {

@Override

public void onItemChildClick(BaseQuickAdapter adapter, View view, int position) {

Toast.makeText(MainActivity.this, "onItemLongClick" + mNameList.get(position), Toast.LENGTH_SHORT).show();

}

});

}

}

其中addHeaderView时的R.layout.item_header.xml和addFooterView时的R.layout.item_footer.xml是随便写的布局，仅供测试之用，这里就不展示出来了。

ok，今天对BRVAH库的简单介绍就到这里了，谢谢诶。