調用另一個類的按鈕或文本字段安卓

我試圖使用在列表中選擇聽者的EditText，但它不能看到它的主要活動帶我在這個調用另一個類的按鈕或文本字段安卓

edt.setVisibility(View.VISIBLE);

錯誤，請，如果您有任何周圍幫我

public class MainActivity extends Activity { 
static int HELLO_ID = 1; 
boolean flag = false; 
CountDownTimer timer; 
//the strings of the notifications 
String titlePills = "Time to take Panadol",DescriptionPills = "Panadol"; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

Spinner spinner = (Spinner) findViewById(R.id.spinner1); 

ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, 
     R.array.planets_array, android.R.layout.simple_spinner_item); 

adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 

spinner.setAdapter(adapter); 

spinner.setOnItemSelectedListener(new SpinnerActivity()); 


Chronometer test = new Chronometer(this); 
Button btn = (Button)findViewById(R.id.button1); 
EditText edt = (EditText)findViewById(R.id.editText1); 


//hide the button and the edit text 
btn.setVisibility(View.GONE); 
edt.setVisibility(View.GONE); 


} 
//********************************************************************************* 
public class SpinnerActivity extends Activity implements OnItemSelectedListener { 


    public void onItemSelected(final AdapterView<?> parent, View view, 
      int pos, long id) { 

     String select = parent.getItemAtPosition(pos).toString(); 



     if(select.equals("Type the timee")) 
     { 
     //edt error can't be resolved 
      edt.setVisibility(View.VISIBLE); 
     }

來源

2013-10-07 ibrahim alafeef

如果您想在SpinnerActivity中處理所選值，請嘗試使用startActivityForResult調用它並處理結果以設置edt的可見性。它只顯示一個活動，所以你想改變它的Viewstate？ –

試試這個..

EditText edt;

爲全地球變

edt = (EditText)findViewById(R.id.editText1);

來源

2013-10-07 12:10:09 Hariharan

謝謝XD：D它的工作原理 –

調用另一個類的按鈕或文本字段安卓

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