我被困了，我需要帮助。我正在尝试使用set并获取Tag但我无法了解它对此操作的工作原理：
- 我正在使用列表视图来显示加载到扩展适配器的图像
- 自定义适配器使用imageview_1，textview_1和button_1为布局充气
- 在我的主要活动中，我有一个用于button_1的“Public Void OnClickHandler”，并且在布局上配置了“android：onClick”，所以当点击按钮时它会做一些事情
- 单击button_1时，我想从该特定视图中获取textview_1中的文本，然后加载不同的图像。
我想使用get和set TAGS来做到这一点，所以我需要使用button_1和imageview_1进行引用。这是我的剪辑代码。先谢谢你
自定义适配器
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
LayoutInflater mInflater = (LayoutInflater)
context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
convertView = mInflater.inflate(R.layout.itemstartsession, null);
holder = new ViewHolder();
holder.image = (WebView)convertView.findViewById(R.id.img_session);
//holder.image.setTag(position);
holder.code = (TextView)convertView.findViewById(R.id.code_item_session_text);
//holder.code.setTag(position);
holder.share=(ImageButton)convertView.findViewById(R.id.share_item_session_button);
holder.share.setTag(position);
convertView.setTag(holder);
// Check if my setTag is ok for button and get the reference to get
//text from textview and the referece to webview, then I gonna load a url
} else {
holder=(ViewHolder)convertView.getTag();
}
StoreDataForBA storeItem= (StoreDataForBA) getItem(position);
holder.image.loadUrl(storeItem.getImage());
holder.code.setText(storeItem.getCode());
return convertView;
}
这是我的数据获取器和设置器，非常简单
public StoreDataForBA( String image, String code) {
this.setImage(image);
this.setCode(code);
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
我的主要活动剪断了
public void shareOnClickHandler(View v) {
// plz here i need the code to get the text from textview and also get the
// reference of the webview, so i can do something like
// StoreDataForBA data = (StoreDataForBA)v.getTag();
// image2.loadUrl("http://image2")..... I'm not sure, thank you
}
你的代码有点混乱，所以我给你一个样本
示例Tag类
public class MyTag
{
String code;
String image;
String web_ref;
public MyTag()
{
code=null;
image=null;
web_ref=null;
}
public MyTag(String cod,String img,String wref)
{
code=cod;
image=img;
web_ref=wref;
}
}
你想在点击按钮时获得这个值吗？因此，将此标记类对象作为标记放在自定义适配器的getView中的按钮上
MyTag myTag=new MyTag("code","image","web_ref");
holder.button.setTag(myTag);
因为您将视图单击作为函数的参数
public void shareOnClickHandler(View v)
{
myTag=(MyTag)v.getTag();
text=myTag.code;
image2.loadUrl("http://"+myTag.image);//..... I'm not sure, thank you
webview.loadUrl(mytag.web_ref);
}
我想你明白了，试着用这个想法来实现你的代码
你非常接近你的答案。只需按照更改完成并完成答案
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if ((convertView == null) || (convertView.getTag() == null)) {
LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = mInflater.inflate(R.layout.list_item, null);
holder = new ViewHolder();
} else {
holder = (ViewHolder) convertView.getTag();
}
convertView.setTag(holder);
return convertView;
}
答案1：
你想做什么：
在此行之上或之后： holder.code.setText(storeItem.getCode()); 添加以下内容： holder.share.setTag(storeItem.getCode());
并在onClick：
public void shareOnClickHandler(View v) {
String code = v.getTag().toString();
// plz here i need the code to get the text from textview and also get the
// reference of the webview, so i can do something like
// StoreDataForBA data = (StoreDataForBA)v.getTag();
// image2.loadUrl("http://image2")..... I'm not sure, thank you
}
要么
答案2：
您可能不需要使用 setTag 和 getTag 如果你这样做
- 转到你的xml并从我们将在Java中使用它的按钮中删除onclick属性
使用以下getView
@覆盖
public View getView（int position，View convertView，ViewGroup parent）{
ViewHolder holder = null;
LayoutInflater mInflater = (LayoutInflater)
context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
convertView = mInflater.inflate(R.layout.itemstartsession, null);
holder = new ViewHolder();
holder.image = (WebView)convertView.findViewById(R.id.img_session);
holder.code = (TextView)convertView.findViewById(R.id.code_item_session_text);
holder.share=(ImageButton)convertView.findViewById(R.id.share_item_session_button);
convertView.setTag(holder);
// Check if my setTag is ok for button and get the reference to get
//text from textview and the reference to webview, then I gonna load a url
} else {
holder=(ViewHolder)convertView.getTag();
}
final StoreDataForBA storeItem= (StoreDataForBA) getItem(position); // final to use inside click
holder.image.loadUrl(storeItem.getImage());
holder.code.setText(storeItem.getCode());
final ViewHolder fh = holder; // it needs to be final to use inside of clicklistener
holder.share.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String text = holder.code.getText().toString(); // I hope that this is what you need.
String text2 = storeItem.getCode(); //use either but I prefer this.
}
});
return convertView;
}