我正在创建一个自定义的适配器MyAdapter并扩展一个ListView listView以显示String数据数组。使用getActivity()方法初始化MyAdapter时出现错误,如下所示:

public class MainActivity extends AppCompatActivity {

    private ListView listView;
    private String[] data = {"Sanskrit", "Bhojpuri", "Newari", "Magar",
            "Gurung", "English", "Maithili", "Tamil", "Hindi",
            "French", "German", "Russian", "Chinese"};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        listView = findViewById(R.id.list_view);

        MyAdapter adapter = new MyAdapter(getActivity(), data);
        listView.setAdapter(adapter);
    }
}

class MyAdapter extends ArrayAdapter {
    String[] data;

    public MyAdapter(Context context, int res, String[] data) {
        super(context,res);

        this.data = data;
    }

    @NonNull
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        LayoutInflater inflater = (LayoutInflater) getContext().
                getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View row = inflater.inflate(R.layout.custom_list_view, parent, false);

        TextView textView = row.findViewById(R.id.textView);

        textView.setText(data[position]);
        return row;
    }
}


任何帮助,将不胜感激。

最佳答案

初始化MyAdapter时,您已经在Activity中。 Activity类没有getActivity()方法,因为它已经是Activity。

使用this

MyAdapter adapter = new MyAdapter(this, data);

关于android - 无法解析我用来初始化适配器的方法“getActivity()”,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/53227902/

10-10 09:06