版权声明:本文为Zhang Phil原创文章,请不要转载! https://blog.csdn.net/zhangphil/article/details/84978684
package zhangphil.book;
import android.app.ListActivity;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
public class MainActivity extends ListActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ArrayAdapter mArrayAdapter = new ArrayAdapter(this, 0) {
private ViewHolder holder;
private String text = null;
@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
if (convertView == null) {
convertView = LayoutInflater.from(getContext()).inflate(android.R.layout.simple_list_item_2, null);
text = "位置=" + position + " , 新建";
holder = new ViewHolder();
holder.text1 = convertView.findViewById(android.R.id.text1);
holder.text2 = convertView.findViewById(android.R.id.text2);
convertView.setTag(holder);
} else {
text = "位置=" + position + " , 复用";
holder = (ViewHolder) convertView.getTag();
}
holder.text1.setText(this.getItem(position));
holder.text2.setText(text);
return convertView;
}
@Nullable
@Override
public String getItem(int position) {
return "位置:" + position;
}
@Override
public int getCount() {
return Integer.MAX_VALUE;
}
};
this.setListAdapter(mArrayAdapter);
}
private class ViewHolder {
public TextView text1;
public TextView text2;
}
}