Android 在栅格视图保持架模式中显示多次的复选框
我正在显示和隐藏imageview上的复选框在gridview中单击,但当我单击一个imageview复选框时,多个图像视图上会出现android上的复选框,当我滚动时,可见复选框将丢失 这是我的适配器Android 在栅格视图保持架模式中显示多次的复选框,android,gridview,checkbox,android-viewholder,Android,Gridview,Checkbox,Android Viewholder,我正在显示和隐藏imageview上的复选框在gridview中单击,但当我单击一个imageview复选框时,多个图像视图上会出现android上的复选框,当我滚动时,可见复选框将丢失 这是我的适配器 public class ImageAdapter extends BaseAdapter { private LayoutInflater mInflater; public ImageAdapter() { mInflate
public class ImageAdapter extends BaseAdapter {
private LayoutInflater mInflater;
public ImageAdapter() {
mInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
return arrPath.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(
R.layout.galleryitems, parent,false);
holder.imageview = (ImageView) convertView.findViewById(R.id.thumbImage);
holder.checkbox = (CheckBox) convertView.findViewById(R.id.itemCheckBox);
convertView.setTag(R.id.itemCheckBox, holder.checkbox);
convertView.setTag(R.id.thumbImage,holder.imageview);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
holder.checkbox = (CheckBox)convertView.getTag();
holder.imageview = (ImageView)convertView.getTag();
}
holder.checkbox.setId(position);
holder.imageview.setId(position);
holder.checkbox.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
CheckBox cb = (CheckBox) v;
int id = cb.getId();
if (thumbnailsselection[id]) {
cb.setChecked(false);
thumbnailsselection[id] = false;
} else {
cb.setChecked(true);
thumbnailsselection[id] = true;
}
}
});
holder.imageview.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
ImageView iv = (ImageView )v;
int id = iv.getId();
if (holder.checkbox.getVisibility() == View.GONE) {
holder.checkbox.getTag();
holder.imageview.getTag();
holder.imageview.setAlpha(0.22f);
holder.checkbox.setVisibility(View.VISIBLE);
holder.checkbox.setChecked(true);
} else if (holder.checkbox.getVisibility() == View.VISIBLE) {
holder.imageview.setAlpha(0.8f);
holder.checkbox.setVisibility(View.GONE);
}
}
});
holder.checkbox.setTag(position);
holder.imageview.setImageBitmap(thumbnails[position]);
holder.checkbox.setChecked(thumbnailsselection[position]);
holder.id = position;
return convertView;
}
}
class ViewHolder {
ImageView imageview;
CheckBox checkbox;
int id;
}
}
这不是你使用ViewHolder的方式。 当您将ViewHolder设置为标记时,它也将像convertView一样被重用。 它应该链接UI,这样您就不需要再次调用findViewById。 但您是否有责任维护数据(您在案例中选择的ImageView位置)
请参见示例。试试这段代码,它对我很有用
public class ImageAdapter extends BaseAdapter {
private LayoutInflater mInflater;
private ArrayList<Items> list
public ImageAdapter(ArrayList<Items> list) {
this.list=list;
mInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
return list.size();
}
public Items getItem(int position) {
return list.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(
R.layout.galleryitems, parent,false);
holder.imageview = (ImageView) convertView.findViewById(R.id.thumbImage);
//Take image view in your XML
holder.checkbox = (ImageView) convertView.findViewById(R.id.itemCheckBox);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
if(list.get(position).isImageSelected()){
// set your check image
holder.checkbox.setImageResource(checkResId);
}else{
// set your Uncheck image
holder.checkbox.setImageResource(unCheckResId);
}
holder.checkbox.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if(list.get(position).isImageSelected()){
// set your Uncheck image
holder.checkbox.setImageResource(unCheckResId);
list.get(position).setIsImageSelected(false);
} else {
// set your check image
holder.checkbox.setImageResource(checkResId);
list.get(position).setIsImageSelected(false);
}
notifyDataSetChanged();
}
});
return convertView;
}
}
class ViewHolder {
ImageView imageview;
// Use ImageView for select and deselect
ImageView checkbox;
int id;
}
}
public class Items {
String thumbImageUrl;
boolean isImageSelected;
public String getThumbImageUrl() {
return thumbImageUrl;
}
public void setThumbImageUrl(String thumbImageUrl) {
this.thumbImageUrl = thumbImageUrl;
}
public boolean isImageSelected() {
return isImageSelected;
}
public void setIsImageSelected(boolean isImageSelected) {
this.isImageSelected = isImageSelected;
}
}
公共类ImageAdapter扩展了BaseAdapter{
私人停车场;
私有数组列表
公共图像适配器(ArrayList列表){
this.list=list;
mInflater=(LayoutInflater)getSystemService(Context.LAYOUT\u INFLATER\u SERVICE);
}
public int getCount(){
返回list.size();
}
公共项目getItem(内部位置){
返回列表。获取(位置);
}
公共长getItemId(int位置){
返回位置;
}
公共视图getView(最终整数位置、视图转换视图、视图组父视图){
最终持票人;
if(convertView==null){
holder=新的ViewHolder();
convertView=mInflater.充气(
R.layout.galleryitems,父项,false);
holder.imageview=(imageview)convertView.findViewById(R.id.thumbImage);
//在XML中获取图像视图
holder.checkbox=(ImageView)convertView.findViewById(R.id.itemCheckBox);
convertView.setTag(支架);
}否则{
holder=(ViewHolder)convertView.getTag();
}
if(list.get(position.isImageSelected()){
//设置支票图像
holder.checkbox.setImageResource(checkResId);
}否则{
//设置取消选中的图像
holder.checkbox.setImageResource(取消选中);
}
holder.checkbox.setOnClickListener(新视图.OnClickListener(){
公共void onClick(视图v){
if(list.get(position.isImageSelected()){
//设置取消选中的图像
holder.checkbox.setImageResource(取消选中);
list.get(position).setIsImageSelected(false);
}否则{
//设置支票图像
holder.checkbox.setImageResource(checkResId);
list.get(position).setIsImageSelected(false);
}
notifyDataSetChanged();
}
});
返回视图;
}
}
类视图持有者{
图像视图图像视图;
//使用ImageView进行选择和取消选择
ImageView复选框;
int-id;
}
}
公共类项目{
字符串thumbImageUrl;
选择布尔值;
公共字符串getThumbImageUrl(){
返回thumbImageUrl;
}
公共void setThumbImageUrl(字符串thumbImageUrl){
this.thumbImageUrl=thumbImageUrl;
}
公共布尔值isImageSelected(){
返回所选图像;
}
公共无效集isImageSelected(布尔值isImageSelected){
this.isImageSelected=isImageSelected;
}
}
我尝试了这段代码,但没有帮助重写公共int-getViewTypeCount(){//TODO自动生成的方法存根,如果(arrPath!=null)返回arrPath.length;否则返回0;}@Override-public int-getItemViewType(int-position){//TODO自动生成的方法存根返回0;}这只是另一个“视图持有者”模式问题?在99%的情况下,视图持有者模式是无用的,只会引起头痛