在一个ListView内的特定位置设置文本的TextView [英] Set text to TextView at a particular position inside a ListView
问题描述
我使用的是的ListView 使用自定义适配器。我有两个的TextView 每一行内。我需要改变这些的TextView 只有文本，我点击textViews。我怎样才能实现呢？
I am using a ListView with a custom Adapter. I have two TextView inside each row. I need to change the text of these TextView only for the textViews which I click. How can I achieve it?
我里面有一个方法，我的 CustomAdapter ，我初始化的
I have a method inside my CustomAdapter where I initialise the TextView's
public class MainListAdapter extends BaseAdapter {
private static final String TAG = "MainListAdapter";
private Context mContext;
private LayoutInflater layoutInflater;
private MyViewPager itemViewPager;
private View viewMain;
private View viewSlide;
private TextView cancel;
private TextView delete, block;
TextView itemName, showResult;
int triedOnce;
private ArrayList<View> views;
private PagerAdapter pagerAdapter;
private ArrayList<String> mList;
public static final String API_KEY = "MYAPIKEY";
public MainListAdapter(Context context, ArrayList<String> list) {
mContext = context;
layoutInflater = LayoutInflater.from(mContext);
mList = list;
}
@Override
public int getCount() {
return mList != null ? mList.size() : 0;
}
@Override
public Object getItem(int position) {
return mList != null ? mList.get(position) : null;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = layoutInflater.inflate(R.layout.listview_item, null);
}
if(position%2 == 0){
convertView.setBackgroundResource(R.drawable.lis_bg);
}else if(position%2 == 1){
convertView.setBackgroundResource(R.drawable.ls_eppadi_bg);
}
viewMain = layoutInflater.inflate(R.layout.listview_item_main, null);
viewSlide = layoutInflater.inflate(R.layout.listview_item_slide, null);
cancel = (TextView)viewSlide.findViewById(R.id.tv_menu_cancel);
delete = (TextView)viewSlide.findViewById(R.id.tv_menu_delete);
block = (TextView) viewSlide.findViewById(R.id.tv_menu_block);
cancel.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//perform cancel
}
});
delete.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//perform delete
}
});
block.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//perform block
}
});
views = new ArrayList<View>();
views.add(viewMain);
views.add(viewSlide);
itemViewPager = (MyViewPager)convertView.findViewById(R.id.vp_list_item);
itemViewPager.setSelfIndex(position);
pagerAdapter = new PagerAdapter() {
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
((MyViewPager)container).removeView(views.get(position));
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
((MyViewPager)container).addView(views.get(position));
return views.get(position);
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == arg1;
}
@Override
public int getCount() {
return views.size();
}
};
fillItemData(convertView, position, viewMain);
itemViewPager.setAdapter(pagerAdapter);
itemViewPager.setCurrentItem(0);
return convertView;
}
//this is where the textview's are initialised
private void fillItemData(View convertView, final int position, View viewMain) {
int[] colorCollection = {
R.color.green, R.color.royalblue, R.color.violet
};
for (int i = 0; i < colorCollection.length; i++) {
colorCollection[i] = mContext.getResources().getColor(colorCollection[i]);
}
int currColor = colorCollection[position % colorCollection.length];
itemName = (TextView)viewMain.findViewById(R.id.tv_item_name);
showResult = (TextView)viewMain.findViewById(R.id.tv_show);
itemName.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
new PushTask().execute(position);
triedOnce = 0;
}
});
itemName.setBackgroundColor(currColor);
showResult.setBackgroundColor(currColor);
itemName.setText(mList.get(position));
}
class PushTask extends AsyncTask<Integer, Integer, Integer> {
@Override
protected void onPreExecute() {
itemName.setVisibility(View.GONE);
showResult.setVisibility(View.VISIBLE);
//set text here based on the position
showResult.setText("SENDING");
}
@Override
protected Integer doInBackground(Integer... position) {
int post = position[0];
int respCode = 0;
//perform my network operations
return respCode;
}
@Override
protected void onPostExecute(Integer response) {
switch(response) {
case 1:
//set text here
showResult.setText("SENT");
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
showResult.setVisibility(View.GONE);
itemName.setVisibility(View.VISIBLE);
}
}, 2000);
break;
case 2:
//set text here
showResult.setText("PLEASE WAIT!");
handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
showResult.setVisibility(View.GONE);
itemName.setVisibility(View.VISIBLE);
}
}, 2000);
break;
case 3:
//set text here
showResult.setText("FAILED!");
handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
showResult.setVisibility(View.GONE);
itemName.setVisibility(View.VISIBLE);
}
}, 2000);
break;
case 4:
//set text here
showResult.setText("FAILED!");
handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
showResult.setVisibility(View.GONE);
itemName.setVisibility(View.VISIBLE);
}
}, 2000);
break;
default:
break;
}
}
}
}
现在我需要基于位置的用户点击到哪里修改 ITEMNAME 和 showResult 的文字。在 itemName.setOnClickListener 有，我会改变这些textViews的文本AsyncTask的。
目前，它的变化对于ListView的最后一行。
Now I need to change the itemName and showResult's text based on the position where the user clicks. The itemName.setOnClickListener has the AsyncTask where I will changing the text of these textViews.
Currently it changes for the last row of the listView.
我如何改变它选择的位置。
How do I change it for the position selected.
先谢谢了。
推荐答案
创建模型（POJO）类第一
与你的两个字符串和一个布尔值，称呼其为器isChecked
添加getter和setter它
create a model(POJO) class first with your two strings and one boolean value call it as isChecked add getters and setters to it
设定值（列表数据）添加到您的ArrayList，并保持setIsChecked值为false首次。像这样
set values(list data) to your arraylist and keep setIsChecked value to false for the first time. like this
ArrayList<model> list = new ArrayList<model>();
list.add(new model("string1","string2",false);
list.add(new model("string11","string22",false);
等
现在onItemClickListener使用这样的循环
now onItemClickListener use for loop like this
for(int i = 0 ; i < list.size; i++){
list.get(i).setIsChecked(false);
}
list.get(itemClickedPosition).setIsChecked(true);
youradapter.notifyDataSetChanged();
后，现在来到了适配器类，你可以设置TextView的选择，你想要做这样的
after that now come to the adapter class where you can set the selected textview as you want do like this
在getView方法做到这一点。
in getView method do this
if(list.get(position).getIsChecked()){
change your textview
}else{
leave as it is
}
做让我知道，如果它可以帮助你。
done let me know if it helps you
这篇关于在一个ListView内的特定位置设置文本的TextView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
