微调器依赖于Android中的另一个微调器 [英] spinner dependent on another spinner in android

问题描述

http://developer.android.com/resources/tutorials/views/hello-spinner.html 我使用此链接作为基础.

http://developer.android.com/resources/tutorials/views/hello-spinner.html I use this link as the base..

我有3个微调器，第一个是国家的微调器，第二个是州的微调器，城市的第三个.

I have 3 spinners, first spinner for country , second for states and third for cities.

我已经看到了stackoverflow上的链接，但这不是很适当.

I had already seen the links on the stackoverflow , but it is not that much proper.

我的代码如下

公共类SpinnerActivity扩展了Activity{

public class SpinnerActivity extends Activity {

String state =";

String state="";

ArrayAdapter adapter1，adapter2;Spinner spinner1，spinner2;

ArrayAdapter adapter1,adapter2; Spinner spinner1,spinner2;

/**在首次创建活动时调用.*/@Override公共无效onCreate(捆绑保存的InstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);

/** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main);

    spinner1 = (Spinner) findViewById(R.id.spinner1);
    spinner2 = (Spinner) findViewById(R.id.spinner2);

   adapter1 = ArrayAdapter.createFromResource(
           this, R.array.states_array, android.R.layout.simple_spinner_item);
   adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
   spinner1.setAdapter(adapter1);
   spinner1.setOnItemSelectedListener(new MyOnItemSelectedListener());


   if(state.equalsIgnoreCase("Gujarat"))
   {  
    adapter2 = ArrayAdapter.createFromResource(this, R.array.rajasthan_array, >android.R.layout.simple_spinner_item);
    }
  if(state == "Rajasthan")
   {
    adapter2 = ArrayAdapter.createFromResource(this, R.array.rajasthan_array, >android.R.layout.simple_spinner_item);
   }

   adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
   spinner2.setAdapter(adapter2);
   spinner2.setOnItemSelectedListener(new MyOnItemSelectedListener());

}

公共类MyOnItemSelectedListener实现OnItemSelectedListener{

public class MyOnItemSelectedListener implements OnItemSelectedListener {

   public void onItemSelected(AdapterView<?> parent,View view, int pos, long id)
   {
      state=parent.getItemAtPosition(pos).toString();
     Toast.makeText(parent.getContext(), "The state is " +
         parent.getItemAtPosition(pos).toString(), Toast.LENGTH_SHORT).show();
   }
   public void onNothingSelected(AdapterView parent)
   {
    //    Do nothing.
   }

}

}

我发现的错误是，我已经在onCreate()方法中创建了他所有的东西.但是我找不到我可以做的另一件事...我不知道为什么这行不通..

the bug I found is , I have created all he thing in the onCreate() method.. but I do not find the alternate thing that can I do ... I don't know why this not work ..

请尽可能提供帮助

谢谢...

推荐答案

在onSelectItem中填充第二个微调框，依此类推.

In onSelectItem fill second spinner and so on.

这篇关于微调器依赖于Android中的另一个微调器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！