我需要使用ProgramAdapter更改列表视图中的单击文本。
MainActivity.java:

public class MainActivity extends AppCompatActivity {

String[] programName = {"ex1", "ex2", "ex3"}

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lvProgram = findViewById(R.id.listView);

ProgramAdapter programAdapter = new ProgramAdapter(this, programName);
lvProgram.setAdapter(programAdapter);

}}

ProgramAdapter.java:

public class ProgramAdapter extends ArrayAdapter<String> {
        Context context;
        String[] programName;

        public ProgramAdapter(Context context, String[] programName) {
            super(context, R.layout.single_item2, R.id.titulo, programName);
            this.context = context;
            this.programName = programName;
        }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        View singleItem = convertView;
        ProgramViewHolder holder = null;
        if(singleItem == null){
            LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            singleItem = layoutInflater.inflate(R.layout.single_item2, parent, false);
            holder = new ProgramViewHolder(singleItem);
            singleItem.setTag(holder);
        }
        else{
            holder = (ProgramViewHolder) singleItem.getTag();
        }
        holder.programTitle.setText(programName[position]);

        }

}

我的尝试是：

ProgramViewHolder finalHolder = holder;
        singleItem.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View view) {

                    if(programName[position] == "ex1") {
                        finalHolder.programTitle.setText("expected text");
                    }

                }
            });

这会暂时更改文本，但每次在列表中向下移动并再次向上移动时，文本都会恢复为默认文本。