根据另一个微调器的选择填充微调器

Question

我必须根据所选国家/地区填充状态。我还必须捕获其他spinners中选择的项目。但是监听器方法没有被调用。

countriesSpinner.setOnItemSelectedListener(this); 
statesSpinner.setOnItemSelectedListener(this); 
yearSpinner.setOnItemSelectedListener(this); 

public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
    // On selecting a spinner item 
    switch(view.getId()){ 
     case R.id.countriesSpinner: 
     { 
      Log.i("selected country",selectedCountry); 
      selectedCountry = parent.getItemAtPosition(position).toString(); 
      populateStates(); 
      ArrayAdapter stateAdapter = new ArrayAdapter(this, android.R.layout.simple_spinner_item, states); 
      statesSpinner.setAdapter(stateAdapter); 
     } 
     break; 

     case R.id.statesSpinner: 
     { 
      selectedState=parent.getItemAtPosition(position).toString(); 
     } 
     break; 

     case R.id.yearSpinner: 
     { 
      selectedYear = parent.getItemAtPosition(position).toString(); 
     } 
    } 



} 

@Override 
public void onNothingSelected(AdapterView<?> parent) { 

} 

Answer 1

你得到了交换机ID错......你需要使用parent.getId()

试试这个：

public void onItemSelected(AdapterView<?> parent, View view, 
     int pos, long id) { 
    switch (parent.getId()) 
    {   
     case R.id.countriesSpinner: 

      Log.i("selected country",selectedCountry); 
      selectedCountry = parent.getItemAtPosition(position).toString(); 
      populateStates(); 
      ArrayAdapter stateAdapter = new ArrayAdapter(this, android.R.layout.simple_spinner_item, states); 
      statesSpinner.setAdapter(stateAdapter); 
      break;    

     case R.id.statesSpinner: 
      selectedState=parent.getItemAtPosition(position).toString(); 
      break;    
     case R.id.yearSpinner: 
      selectedYear=parent.getItemAtPosition(position).toString(); 
      break; 
    } 
}