Java 如何从另一个类更改imageview源？
我有两个类，第一个是Java 如何从另一个类更改imageview源？,java,android,listview,android-imageview,android-adapter,Java,Android,Listview,Android Imageview,Android Adapter,我有两个类，第一个是FragmentA，第二个是ListRequestAdapter（ArrayAdapter）。我想从我的FragmentA更改ListRequestAdapter中的ImageView。但是当我在我的FragmentA中声明ImageView时，我总是得到一个错误NullPointerException。我怎么能这么做 这是我的密码： FragmentA.java类： public View onCreateView(LayoutInflater inflater, Vie
FragmentAListRequestAdapterFragmentAListRequestAdapterImageViewFragmentANullPointerException public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_item_list_request, container, false);
setHasOptionsMenu(true);
listPhoto = (ImageView) getView().findViewById(R.id.listPhoto);
listPhoto.setImageResource(R.drawable.pastel_blue);
}
public class ListRequestAdapter extends ArrayAdapter<ListRequestItem> {
ImageView listPhoto;
public ListRequestAdapter(Context context, List<ListRequestItem> items)
{
super(context, R.layout.style_fragment_list_request, items);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if(convertView == null) {
// inflate the GridView item layout
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(R.layout.style_fragment_list_request, parent, false);
// initialize the view holder
viewHolder = new ViewHolder();
viewHolder.tvTanggal = (TextView) convertView.findViewById(R.id.tvTanggalRequest);
viewHolder.tvTipe = (TextView) convertView.findViewById(R.id.tvTipeRequest);
viewHolder.tvStatus = (TextView) convertView.findViewById(R.id.tvStatus);
viewHolder.permitid = "";
convertView.setTag(viewHolder);
} else {
// recycle the already inflated view
viewHolder = (ViewHolder) convertView.getTag();
}
// update the item view
ListRequestItem item = getItem(position);
viewHolder.tvTanggal.setText(item.tanggal);
viewHolder.tvTipe.setText(item.tipe);
viewHolder.tvStatus.setText(item.status);
viewHolder.permitid = item.permitid;
return convertView;
}
private static class ViewHolder {
TextView tvTanggal;
TextView tvTipe;
TextView tvStatus;
String permitid;
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:tag="reqtag"
android:id="@+id/rlListRequestWorkflow"
>
<LinearLayout
android:layout_width="match_parent"
android:orientation="horizontal"
android:weightSum="1"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="0dp"
android:layout_weight="0.2"
android:orientation="vertical"
android:layout_height="wrap_content">
<!--ImageView here-->
<de.hdodenhof.circleimageview.CircleImageView
android:id="@+id/listPhoto"
android:layout_width="65dp"
android:layout_height="63dp"
android:layout_weight="1"
android:layout_gravity="center_horizontal"
android:src="@drawable/ic_menu_camera"
android:layout_marginTop="10dp" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_weight="0.8"
android:orientation="vertical"
android:layout_height="wrap_content">
<!--All textViews here-->
<TextView
android:layout_width="100dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Type"
android:textSize="18dp"
android:fontFamily="sans-serif"
android:textColor="@color/black"
android:id="@+id/tvTipeRequest"
android:width="130dp" />
<TextView
android:layout_width="100dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Date"
android:fontFamily="sans-serif"
android:id="@+id/tvTanggalRequest"
android:textSize="15dp"
android:width="130dp" />
<TextView
android:layout_width="100dp"
android:layout_weight="1"
android:layout_height="50dp"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/black"
android:text="Status"
android:textSize="15dp"
android:fontFamily="sans-serif"
android:id="@+id/tvStatus"
android:layout_column="38" />
</LinearLayout>
</LinearLayout>
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_item_list_request, container, false);
setHasOptionsMenu(true);
listPhoto = (ImageView) getView().findViewById(R.id.listPhoto);
listPhoto.setImageResource(R.drawable.pastel_blue);
}
public class ListRequestAdapter extends ArrayAdapter<ListRequestItem> {
ImageView listPhoto;
public ListRequestAdapter(Context context, List<ListRequestItem> items)
{
super(context, R.layout.style_fragment_list_request, items);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if(convertView == null) {
// inflate the GridView item layout
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(R.layout.style_fragment_list_request, parent, false);
// initialize the view holder
viewHolder = new ViewHolder();
viewHolder.tvTanggal = (TextView) convertView.findViewById(R.id.tvTanggalRequest);
viewHolder.tvTipe = (TextView) convertView.findViewById(R.id.tvTipeRequest);
viewHolder.tvStatus = (TextView) convertView.findViewById(R.id.tvStatus);
viewHolder.permitid = "";
convertView.setTag(viewHolder);
} else {
// recycle the already inflated view
viewHolder = (ViewHolder) convertView.getTag();
}
// update the item view
ListRequestItem item = getItem(position);
viewHolder.tvTanggal.setText(item.tanggal);
viewHolder.tvTipe.setText(item.tipe);
viewHolder.tvStatus.setText(item.status);
viewHolder.permitid = item.permitid;
return convertView;
}
private static class ViewHolder {
TextView tvTanggal;
TextView tvTipe;
TextView tvStatus;
String permitid;
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:tag="reqtag"
android:id="@+id/rlListRequestWorkflow"
>
<LinearLayout
android:layout_width="match_parent"
android:orientation="horizontal"
android:weightSum="1"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="0dp"
android:layout_weight="0.2"
android:orientation="vertical"
android:layout_height="wrap_content">
<!--ImageView here-->
<de.hdodenhof.circleimageview.CircleImageView
android:id="@+id/listPhoto"
android:layout_width="65dp"
android:layout_height="63dp"
android:layout_weight="1"
android:layout_gravity="center_horizontal"
android:src="@drawable/ic_menu_camera"
android:layout_marginTop="10dp" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_weight="0.8"
android:orientation="vertical"
android:layout_height="wrap_content">
<!--All textViews here-->
<TextView
android:layout_width="100dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Type"
android:textSize="18dp"
android:fontFamily="sans-serif"
android:textColor="@color/black"
android:id="@+id/tvTipeRequest"
android:width="130dp" />
<TextView
android:layout_width="100dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Date"
android:fontFamily="sans-serif"
android:id="@+id/tvTanggalRequest"
android:textSize="15dp"
android:width="130dp" />
<TextView
android:layout_width="100dp"
android:layout_weight="1"
android:layout_height="50dp"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/black"
android:text="Status"
android:textSize="15dp"
android:fontFamily="sans-serif"
android:id="@+id/tvStatus"
android:layout_column="38" />
</LinearLayout>
</LinearLayout>
公共类ListRequestAdapter扩展了ArrayAdapter{
图像视图列表照片；
公共ListRequestAdapter（上下文、列表项）
{
super（上下文、R.layout.style、片段、列表、项目）；
}
@凌驾
公共视图getView（int位置、视图转换视图、视图组父视图）{
持票人持票人；
if（convertView==null）{
//展开GridView项布局
LayoutInflater充气器=LayoutInflater.from（getContext（））；
convertView=充气机。充气（R.layout.style\u fragment\u list\u request，parent，false）；
//初始化视图保持架
viewHolder=新的viewHolder（）；
viewHolder.tvTanggal=（TextView）convertView.findViewById（R.id.tvTanggalRequest）；
viewHolder.tvTipe=（TextView）convertView.findViewById（R.id.tvTipeRequest）；
viewHolder.tvStatus=（TextView）convertView.findViewById（R.id.tvStatus）；
viewHolder.permitid=“”；
convertView.setTag（viewHolder）；
}否则{
//回收已膨胀的视图
viewHolder=（viewHolder）convertView.getTag（）；
}
//更新项目视图
ListRequestItem=getItem（位置）；
viewHolder.tvTanggal.setText（item.tanggal）；
viewHolder.tvTipe.setText（item.tipe）；
viewHolder.tvStatus.setText（item.status）；
viewHolder.permitid=item.permitid；
返回视图；
}
私有静态类视图持有者{
文本视图tvTanggal；
TextView-tvTipe；
文本视图状态；
字符串permitid；
}
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_item_list_request, container, false);
setHasOptionsMenu(true);
listPhoto = (ImageView) getView().findViewById(R.id.listPhoto);
listPhoto.setImageResource(R.drawable.pastel_blue);
}
public class ListRequestAdapter extends ArrayAdapter<ListRequestItem> {
ImageView listPhoto;
public ListRequestAdapter(Context context, List<ListRequestItem> items)
{
super(context, R.layout.style_fragment_list_request, items);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if(convertView == null) {
// inflate the GridView item layout
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(R.layout.style_fragment_list_request, parent, false);
// initialize the view holder
viewHolder = new ViewHolder();
viewHolder.tvTanggal = (TextView) convertView.findViewById(R.id.tvTanggalRequest);
viewHolder.tvTipe = (TextView) convertView.findViewById(R.id.tvTipeRequest);
viewHolder.tvStatus = (TextView) convertView.findViewById(R.id.tvStatus);
viewHolder.permitid = "";
convertView.setTag(viewHolder);
} else {
// recycle the already inflated view
viewHolder = (ViewHolder) convertView.getTag();
}
// update the item view
ListRequestItem item = getItem(position);
viewHolder.tvTanggal.setText(item.tanggal);
viewHolder.tvTipe.setText(item.tipe);
viewHolder.tvStatus.setText(item.status);
viewHolder.permitid = item.permitid;
return convertView;
}
private static class ViewHolder {
TextView tvTanggal;
TextView tvTipe;
TextView tvStatus;
String permitid;
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:tag="reqtag"
android:id="@+id/rlListRequestWorkflow"
>
<LinearLayout
android:layout_width="match_parent"
android:orientation="horizontal"
android:weightSum="1"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="0dp"
android:layout_weight="0.2"
android:orientation="vertical"
android:layout_height="wrap_content">
<!--ImageView here-->
<de.hdodenhof.circleimageview.CircleImageView
android:id="@+id/listPhoto"
android:layout_width="65dp"
android:layout_height="63dp"
android:layout_weight="1"
android:layout_gravity="center_horizontal"
android:src="@drawable/ic_menu_camera"
android:layout_marginTop="10dp" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_weight="0.8"
android:orientation="vertical"
android:layout_height="wrap_content">
<!--All textViews here-->
<TextView
android:layout_width="100dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Type"
android:textSize="18dp"
android:fontFamily="sans-serif"
android:textColor="@color/black"
android:id="@+id/tvTipeRequest"
android:width="130dp" />
<TextView
android:layout_width="100dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Date"
android:fontFamily="sans-serif"
android:id="@+id/tvTanggalRequest"
android:textSize="15dp"
android:width="130dp" />
<TextView
android:layout_width="100dp"
android:layout_weight="1"
android:layout_height="50dp"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/black"
android:text="Status"
android:textSize="15dp"
android:fontFamily="sans-serif"
android:id="@+id/tvStatus"
android:layout_column="38" />
</LinearLayout>
</LinearLayout>
只需将包含
图像视图的布局充气即可解决问题，如下所示：
View anotherView = inflater.inflate(R.layout.style_fragment_list_request,container,false);
imgView = (ImageView)anotherView.findViewById(R.id.listPhoto);`
public class ListRequestAdapter extends ArrayAdapter<ListRequestItem> {
public ListRequestAdapter(Context context, List<ListRequestItem> items){
super(context, R.layout.style_fragment_list_request, items);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if(convertView == null) {
// inflate the GridView item layout
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(R.layout.style_fragment_list_request, parent, false);
// initialize the view holder
viewHolder = new ViewHolder();
viewHolder.imgPhoto = (ImageView) convertView.findViewById(R.id.listPhoto);
viewHolder.tvTanggal = (TextView) convertView.findViewById(R.id.tvTanggalRequest);
viewHolder.tvTipe = (TextView) convertView.findViewById(R.id.tvTipeRequest);
viewHolder.tvStatus = (TextView) convertView.findViewById(R.id.tvStatus);
viewHolder.permitid = "";
convertView.setTag(viewHolder);
} else {
// recycle the already inflated view
viewHolder = (ViewHolder) convertView.getTag();
}
// update the item view
ListRequestItem item = getItem(position);
// Setup ImageView accord to DataList,
// may be imageID from DataList.
if(imageID == null) viewHolder.imgPhoto.setVisibility(View.INVISIBLE);
else{
viewHolder.imgPhoto.setImageResource(item.imageID);
viewHolder.setVisibility(VIEW_VISIBLE);
}
viewHolder.tvTanggal.setText(item.tanggal);
viewHolder.tvTipe.setText(item.tipe);
viewHolder.tvStatus.setText(item.status);
viewHolder.permitid = item.permitid;
return convertView;
}
private static class ViewHolder {
ImageView imgPhoto;
TextView tvTanggal;
TextView tvTipe;
TextView tvStatus;
String permitid;
}
}
只需将包含ImageView
的布局充气即可解决此问题，如下所示：
View anotherView = inflater.inflate(R.layout.style_fragment_list_request,container,false);
imgView = (ImageView)anotherView.findViewById(R.id.listPhoto);`
public class ListRequestAdapter extends ArrayAdapter<ListRequestItem> {
public ListRequestAdapter(Context context, List<ListRequestItem> items){
super(context, R.layout.style_fragment_list_request, items);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if(convertView == null) {
// inflate the GridView item layout
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(R.layout.style_fragment_list_request, parent, false);
// initialize the view holder
viewHolder = new ViewHolder();
viewHolder.imgPhoto = (ImageView) convertView.findViewById(R.id.listPhoto);
viewHolder.tvTanggal = (TextView) convertView.findViewById(R.id.tvTanggalRequest);
viewHolder.tvTipe = (TextView) convertView.findViewById(R.id.tvTipeRequest);
viewHolder.tvStatus = (TextView) convertView.findViewById(R.id.tvStatus);
viewHolder.permitid = "";
convertView.setTag(viewHolder);
} else {
// recycle the already inflated view
viewHolder = (ViewHolder) convertView.getTag();
}
// update the item view
ListRequestItem item = getItem(position);
// Setup ImageView accord to DataList,
// may be imageID from DataList.
if(imageID == null) viewHolder.imgPhoto.setVisibility(View.INVISIBLE);
else{
viewHolder.imgPhoto.setImageResource(item.imageID);
viewHolder.setVisibility(VIEW_VISIBLE);
}
viewHolder.tvTanggal.setText(item.tanggal);
viewHolder.tvTipe.setText(item.tipe);
viewHolder.tvStatus.setText(item.status);
viewHolder.permitid = item.permitid;
return convertView;
}
private static class ViewHolder {
ImageView imgPhoto;
TextView tvTanggal;
TextView tvTipe;
TextView tvStatus;
String permitid;
}
}
您的回答无助于在ListView中升级ImageView。您只需创建一个与任何内容都不相关的新视图（另一个视图）。要在ListView中更新ImageView，您的数据列表中应该有一些相关信息（ImageID或ImagePath等）。设置/更新信息后，只需在片段内调用adapter.notifyDataSetChanged（）
此外，如果没有数据，您可以修改ListRequestAdapter以隐藏ImageView，如下所示：
View anotherView = inflater.inflate(R.layout.style_fragment_list_request,container,false);
imgView = (ImageView)anotherView.findViewById(R.id.listPhoto);`
public class ListRequestAdapter extends ArrayAdapter<ListRequestItem> {
public ListRequestAdapter(Context context, List<ListRequestItem> items){
super(context, R.layout.style_fragment_list_request, items);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if(convertView == null) {
// inflate the GridView item layout
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(R.layout.style_fragment_list_request, parent, false);
// initialize the view holder
viewHolder = new ViewHolder();
viewHolder.imgPhoto = (ImageView) convertView.findViewById(R.id.listPhoto);
viewHolder.tvTanggal = (TextView) convertView.findViewById(R.id.tvTanggalRequest);
viewHolder.tvTipe = (TextView) convertView.findViewById(R.id.tvTipeRequest);
viewHolder.tvStatus = (TextView) convertView.findViewById(R.id.tvStatus);
viewHolder.permitid = "";
convertView.setTag(viewHolder);
} else {
// recycle the already inflated view
viewHolder = (ViewHolder) convertView.getTag();
}
// update the item view
ListRequestItem item = getItem(position);
// Setup ImageView accord to DataList,
// may be imageID from DataList.
if(imageID == null) viewHolder.imgPhoto.setVisibility(View.INVISIBLE);
else{
viewHolder.imgPhoto.setImageResource(item.imageID);
viewHolder.setVisibility(VIEW_VISIBLE);
}
viewHolder.tvTanggal.setText(item.tanggal);
viewHolder.tvTipe.setText(item.tipe);
viewHolder.tvStatus.setText(item.status);
viewHolder.permitid = item.permitid;
return convertView;
}
private static class ViewHolder {
ImageView imgPhoto;
TextView tvTanggal;
TextView tvTipe;
TextView tvStatus;
String permitid;
}
}
公共类ListRequestAdapter扩展了ArrayAdapter{
公共ListRequestAdapter（上下文、列表项）{
super（上下文、R.layout.style、片段、列表、项目）；
}
@凌驾
公共视图getView（int位置、视图转换视图、视图组父视图）{
持票人持票人；
if（convertView==null）{
//展开GridView项布局
LayoutInflater充气器=LayoutInflater.from（getContext（））；
convertView=充气机。充气（R.layout.style\u fragment\u list\u request，parent，false）；
//初始化视图保持架
viewHolder=新的viewHolder（）；
viewHolder.imgPhoto=（ImageView）convertView.findViewById（R.id.listPhoto）；
viewHolder.tvTanggal=（TextView）convertView.findViewById（R.id.tvTanggalRequest）；
viewHolder.tvTipe=（TextView）convertView.findViewById（R.id.tvTipeRequest）；
viewHolder.tvStatus=（TextView）convertView.findViewById（R.id.tvStatus）；
viewHolder.permitid=“”；
convertView.setTag（viewHolder）；
}否则{
//回收已膨胀的视图
viewHolder=（viewHolder）convertView.getTag（）；
}
//更新项目视图
ListRequestItem=getItem（位置）；
//根据数据列表设置ImageView，
//可能是数据列表中的imageID。
if（imageID==null）viewHolder.imgPhoto.setVisibility（View.INVISIBLE）；
否则{
viewHolder.imgPhoto.setImageResource（item.imageID）；
viewHolder.setVisibility（视图可见）；
}
viewHolder.tvTanggal.setText（item.tanggal）；
viewHolder.tvTipe.setText（item.tipe）；
viewHolder.tvStatus.setText（item.status）；
viewHolder.permitid=item.permitid；
返回视图；
}
私有静态类视图持有者{
ImageView imgPhoto；
文本视图tvTanggal；
TextView-tvTipe；
文本视图状态；
字符串permitid；
}
}
希望这有帮助 您的回答无助于在ListView中升级ImageView。您只需创建一个与任何内容都不相关的新视图（另一个视图）。要在ListView中更新ImageView，您的数据列表中应该有一些相关信息（ImageID或ImagePath等）。设置/更新信息后，只需在片段内调用adapter.notifyDataSetChanged（）
此外，如果没有数据，您可以修改ListRequestAdapter以隐藏ImageView，如下所示：
View anotherView = inflater.inflate(R.layout.style_fragment_list_request,container,false);
imgView = (ImageView)anotherView.findViewById(R.id.listPhoto);`
public class ListRequestAdapter extends ArrayAdapter<ListRequestItem> {
public ListRequestAdapter(Context context, List<ListRequestItem> items){
super(context, R.layout.style_fragment_list_request, items);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if(convertView == null) {
// inflate the GridView item layout
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(R.layout.style_fragment_list_request, parent, false);
// initialize the view holder
viewHolder = new ViewHolder();
viewHolder.imgPhoto = (ImageView) convertView.findViewById(R.id.listPhoto);
viewHolder.tvTanggal = (TextView) convertView.findViewById(R.id.tvTanggalRequest);
viewHolder.tvTipe = (TextView) convertView.findViewById(R.id.tvTipeRequest);
viewHolder.tvStatus = (TextView) convertView.findViewById(R.id.tvStatus);
viewHolder.permitid = "";
convertView.setTag(viewHolder);
} else {
// recycle the already inflated view
viewHolder = (ViewHolder) convertView.getTag();
}
// update the item view
ListRequestItem item = getItem(position);
// Setup ImageView accord to DataList,
// may be imageID from DataList.
if(imageID == null) viewHolder.imgPhoto.setVisibility(View.INVISIBLE);
else{
viewHolder.imgPhoto.setImageResource(item.imageID);
viewHolder.setVisibility(VIEW_VISIBLE);
}
viewHolder.tvTanggal.setText(item.tanggal);
viewHolder.tvTipe.setText(item.tipe);
viewHolder.tvStatus.setText(item.status);
viewHolder.permitid = item.permitid;
return convertView;
}
private static class ViewHolder {
ImageView imgPhoto;
TextView tvTanggal;
TextView tvTipe;
TextView tvStatus;
String permitid;
}
}
公共类ListRequestAdapter扩展了ArrayAdapter{
公共ListRequestAdapter（上下文、列表项）{
super（上下文、R.layout.style、片段、列表、项目）；
}
@凌驾
公共视图getView（int位置、视图转换视图、视图组父视图）{
持票人持票人；
if（convertView==null）{
//展开GridView项布局
LayoutInflater充气器=LayoutInflater.from（getContext（））；
convertView=充气机。充气（R.layout.style\u fragment\u list\u request，parent，false）；
//初始化视图保持架