java - 更改ListView某一行的图标

Question

我在 ListView 中显示一些行，并且只想通过查看列表中的任何日期是否与今天的日期匹配来更改其中一行。

我的部分代码是:

DateFormat df = new SimpleDateFormat("EEEEE, LLLL d", Locale.US);
String[] suspendedDates = {
    "Tuesday, January 1",
    "Wednesday, April 16",
    "Monday, October 6",
    "Wednesday, December 25"
};

lvDisplay = (ListView) findViewById(R.id.lvDisp);

        for (int i = 0; i < suspendedDates.length; i ++) {
            sDate = suspendedDates[i];
            sReason = datesReason[i];
            if (Arrays.asList(suspendedDates).contains(df.format(Calendar.getInstance(Locale.US).getTime()))) {
                inIconShow = R.drawable.caliconpressed; //if today matches display a different drawable
                contents.add(new SetRows(inIconShow, sDate, sReason));
            }
            if (!Arrays.asList(suspendedDates).contains(df.format(Calendar.getInstance(Locale.US).getTime()))) {
                inIconShow = R.drawable.calicon; //if today doesn't match the array display the default drawable
                contents.add(new SetRows(inIconShow, sDate, sReason));
            }
        }
        // Now set your adapter.
        adapter = new SetRowsCustomAdapter(MainActivity.this, R.layout.listdates, contents);
        lvDisplay.setAdapter(adapter);

SetRowsCustomAdapter 类:

import java.util.ArrayList;

import android.app.Activity;
import android.content.Context;
import android.graphics.Typeface;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class SetRowsCustomAdapter extends ArrayAdapter<SetRows> {
    Context context;
   int layoutResourceId;
   ArrayList<SetRows> data=new ArrayList<SetRows>();
   public SetRowsCustomAdapter(Context context, int layoutResourceId, ArrayList<SetRows> data) {
       super(context, layoutResourceId, data);
       this.layoutResourceId = layoutResourceId;
       this.context = context;
       this.data = data;
   }

   @Override
   public View getView(int position, View convertView, ViewGroup parent) {
       View row = convertView;
       ImageHolder holder = null;

       if(row == null)
       {
           LayoutInflater inflater = ((Activity)context).getLayoutInflater();
           row = inflater.inflate(layoutResourceId, parent, false);

           holder = new ImageHolder();
           holder.txtTitle = (TextView)row.findViewById(R.id.tvDateVal);
           //holder.txtTitle.setTypeface(Typeface.createFromAsset(getContext().getAssets(), "fonts/robm.ttf"));
           holder.imgIcon = (ImageView)row.findViewById(R.id.ivIcon0);
           holder.txtID = (TextView)row.findViewById(R.id.tvReasonVal);
           //holder.txtID.setTypeface(Typeface.createFromAsset(getContext().getAssets(), "fonts/robm.ttf"));
           row.setTag(holder);
       }
       else
       {
           holder = (ImageHolder)row.getTag();
       }

       SetRows myImage = data.get(position);
       holder.txtTitle.setText(myImage.name);
       holder.txtID.setText(myImage.id);
       int outImage=myImage.image;
       holder.imgIcon.setImageResource(outImage);
      return row;

   }

   static class ImageHolder
   {
       ImageView imgIcon;
       TextView txtTitle;
       TextView txtID;
   }
}

因此，第 4 行应该有不同的图标，其他 3 行应该有默认图标。发生的情况是，如果日期匹配，则每行都有不同的图标，否则每行都有默认图标。

如何修复它？

Answer 1

如果您想更改图像，可以在 getView 方法中执行以下操作:

@Override
   public View getView(int position, View convertView, ViewGroup parent) {
       View row = convertView;
       ImageHolder holder = null;

       if(row == null)
       {
           LayoutInflater inflater = ((Activity)context).getLayoutInflater();
           row = inflater.inflate(layoutResourceId, parent, false);

           holder = new ImageHolder();
           holder.txtTitle = (TextView)row.findViewById(R.id.tvDateVal);
           //holder.txtTitle.setTypeface(Typeface.createFromAsset(getContext().getAssets(), "fonts/robm.ttf"));
           holder.imgIcon = (ImageView)row.findViewById(R.id.ivIcon0);
           holder.txtID = (TextView)row.findViewById(R.id.tvReasonVal);
           //holder.txtID.setTypeface(Typeface.createFromAsset(getContext().getAssets(), "fonts/robm.ttf"));
           row.setTag(holder);
       }
       else
       {
           holder = (ImageHolder)row.getTag();
       }

       SetRows myImage = data.get(position);
       holder.txtTitle.setText(myImage.name);
       holder.txtID.setText(myImage.id);
       int outImage=myImage.image;
       if (data.getValue)
          holder.imgIcon.setImageResource(deferentIcon);
       else
          holder.imgIcon.setImageResource(defaultIcon);
      return row;

   }

如果您想更改多行图标，您可以发送一个行列表并 checkin 该列表，并使用 adapter.notifyDataSetChanged()

刷新您的列表

编辑

根据您的情况，您可以在 DS 中添加 boolean 值，如果日期等于则设置 true，否则设置 else that，并在 if 语句中检查