【移動應(yīng)用開發(fā)技術(shù)】Adapter 中如何為RecyclerView添加單擊事件

【移動應(yīng)用開發(fā)技術(shù)】Adapter中如何為RecyclerView添加單擊事件

Adapter中如何為RecyclerView添加單擊事件，相信很多沒有經(jīng)驗(yàn)的人對此束手無策，為此本文總結(jié)了問題出現(xiàn)的原因和解決方法，通過這篇文章希望你能解決這個(gè)問題。RecyclerView的每個(gè)Item的點(diǎn)擊事件并沒有像ListView一樣封裝在組件中，需要Item的單擊事件時(shí)就需要自己去實(shí)現(xiàn)，在Adapter中為RecyclerView添加單擊事件參考如下：在RecyclerView的Adapyer中定義單擊事件的回調(diào)接口：/**

*

定義

RecyclerView

選項(xiàng)單擊事件的回調(diào)接口

*/

public

interface

OnItemClickListener{

//參數(shù)（父組件，當(dāng)前單擊的View,單擊的View的位置，數(shù)據(jù)）

void

onItemClick(RecyclerView

parent,View

view,

int

position,

String

data);

}在RecyclerView的Adapyer中聲明該接口，并提供setter方法：private

OnItemClickListener

onItemClickListener;

public

void

setOnItemClickListener(OnItemClickListener

onItemClickListener){

this.onItemClickListener

=

onItemClickListener;

}在RecyclerView的Adapyer類實(shí)現(xiàn)View.OnClickListener接口，并重寫onClick(Viewview)方法，然后設(shè)置給接口的事件監(jiān)聽：public

class

RvAdapter1

extends

RecyclerView.Adapter<RvAdapter1.DataViewHolder>

implements

View.OnClickListener{

...

view.setOnClickListener(this);//設(shè)置監(jiān)聽器

...

@Override

public

void

onClick(View

view)

{

//根據(jù)RecyclerView獲得當(dāng)前View的位置

int

position

=

recyclerView.getChildAdapterPosition(view);

//程序執(zhí)行到此，會去執(zhí)行具體實(shí)現(xiàn)的onItemClick()方法

if

(onItemClickListener!=null){

onItemClickListener.onItemClick(recyclerView,view,position,mList.get(position));

}

}

...

}在MainActivity中通過Adapter設(shè)置每個(gè)Item的單擊事件：adapter.setOnItemClickListener(new

RvAdapter1.OnItemClickListener()

{

@Override

public

void

onItemClick(RecyclerView

parent,

View

view,

int

position,

String

data)

{

Toast.makeText(MainActivity.this,

data,

Toast.LENGTH_SHORT).show();

}

});/**

*

Created

by

jzman

on

2017/5/13

0013.

*

RecycleView的Adapter

*/

public

class

RvAdapter1

extends

RecyclerView.Adapter<RvAdapter1.DataViewHolder>

implements

View.OnClickListener{

private

Context

mContext;

private

RecyclerView

recyclerView;

private

ArrayList<String>

mList;

public

RvAdapter1()

{}

public

RvAdapter1(Context

mContext,

ArrayList<String>

mList)

{

this.mContext

=

mContext;

this.mList

=

mList;

}

/**

*

用于創(chuàng)建ViewHolder

*

@param

parent

*

@param

viewType

*

@return

*/

@Override

public

DataViewHolder

onCreateViewHolder(ViewGroup

parent,

int

viewType)

{

View

view

=

LayoutInflater.from(mContext).inflate(R.layout.item,null);

view.setOnClickListener(this);

//使用代碼設(shè)置寬高（xml布局設(shè)置無效時(shí)）

view.setLayoutParams(new

ViewGroup.LayoutParams(

ViewGroup.LayoutParams.MATCH_PARENT,

ViewGroup.LayoutParams.WRAP_CONTENT));

DataViewHolder

holder

=

new

DataViewHolder(view);

return

holder;

}

/**

*

綁定數(shù)據(jù)

*

@param

holder

*

@param

position

*/

@Override

public

void

onBindViewHolder(DataViewHolder

holder,

int

position)

{

holder.tv_data.setText(mList.get(position));

}

/**

*

選項(xiàng)總數(shù)

*

@return

*/

@Override

public

int

getItemCount()

{

return

mList.size();

}

@Override

public

void

onClick(View

view)

{

//根據(jù)RecyclerView獲得當(dāng)前View的位置

int

position

=

recyclerView.getChildAdapterPosition(view);

//程序執(zhí)行到此，會去執(zhí)行具體實(shí)現(xiàn)的onItemClick()方法

if

(onItemClickListener!=null){

onItemClickListener.onItemClick(recyclerView,view,position,mList.get(position));

}

}

/**

*

創(chuàng)建ViewHolder

*/

public

static

class

DataViewHolder

extends

RecyclerView.ViewHolder{

TextView

tv_data;

public

DataViewHolder(View

itemView)

{

super(itemView);

tv_data

=

(TextView)

itemView.findViewById(R.id.tv_recycle);

}

}

private

OnItemClickListener

onItemClickListener;

public

void

setOnItemClickListener(OnItemClickListener

onItemClickListener){

this.onItemClickListener

=

onItemClickListener;

}

/**

*

定義RecyclerView選項(xiàng)單擊事件的回調(diào)接口

*/

public

interface

OnItemClickListener{

//參數(shù)（父組件，當(dāng)前單擊的View,單擊的View的位置，數(shù)據(jù)）

void

onItemClick(RecyclerView

parent,View

view,

int

position,

String

data);

}

/**

*

將RecycleView附加到Adapter上

*/

@Override

public

void

onAttachedToRecyclerView(RecyclerView

recyclerView)

{

super.onAttachedToRecyclerView(recyclerView);

this.recyclerView=

recyclerView;

}

/**

*

將RecycleView從Adapter解除

*/

@Override

public

void

onDetachedFromRecyclerView(RecyclerView

recyclerView)

{

super.onDetachedFromRecyclerView(recyclerView);

this.recyclerView

=

null;

}

}/**

*

Created

by

jzman

on

2017/5/13

0013.

*/

public

class

MainActivity

extends

AppCompatActivity

{

private

RecyclerView

rv;

RvAdapter1

adapter;

@Override

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

rv

=

(RecyclerView)

findViewById(R.id.rv);

//設(shè)置布局管理器

//

rv.setLayoutManager(new

LinearLayoutManager(this));//線性

rv.setLayoutManager(new

GridLayoutManager(this,4));//線性

//

rv.setLayoutManager(new

StaggeredGridLayoutManager(4,StaggeredGridLayoutManager.VERTICAL));//線性

adapter

=

new

RvAdapter1(this,initData());

adapter.setOnItemClickListener(new

RvAdapter1.OnItemClickListener()

{

@Override

public

void

onItemClick(RecyclerView

parent,

View

view,

int

position,

String

data)

{

Toast.makeText(MainActivity.this,

data,

Toast.LENGTH_SHORT).show()