Question

我尝试在列表选择侦听器中使用edittext但它无法从主活动中看到它把我带到这个错误

edt.setVisibility(View.VISIBLE);

所以，如果你有任何帮助我的话，那么请

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);
        }

Answer 1

试试这个..

EditText edt;

作为全局变量

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

从另一个类调用按钮或文本字段安卓

1 个答案: