android - fatal error Spinner 和 ArrayAdapter

Question

我有这部分微调器代码。但我得到 fatal error 。这里有什么问题？谢谢!我的 Activity 扩展了 FragmentActivity。

                Spinner spinner;
                String[] layers = {getString(R.string.a), getString(R.string.b), getString(R.string.c)};

                LayoutInflater li = LayoutInflater.from(this);
                View v;
                v  = li.inflate(R.layout.nearest, null);

                ArrayAdapter<String> adapter = new ArrayAdapter<String>(MyActivity.this, android.R.layout.simple_spinner_item, layers);
                spinner = (Spinner) findViewById(R.id.spinner_nearest);
                spinner.setAdapter(adapter);


                AlertDialog.Builder builder = new AlertDialog.Builder(this);
                builder.setView(v);

                builder.setCancelable(true);
                AlertDialog alert = builder.create();
                alert.show();}

Answer 1

nearest.xml 中是否有您的微调器？

然后改为

spinner = (Spinner) v.findViewById(R.id.spinner_nearest);