致命錯誤微調和ArrayAdapter

Question

我有這部分代碼爲微調。但我得到致命的錯誤。這裏有什麼問題？謝謝！我的活動擴展了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

是在nearest.xml您的微調？

然後換

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