package com.zzw.spinner;

 import android.app.Activity;

 import android.content.Context;

 import android.os.Bundle;

 import android.view.LayoutInflater;

 import android.view.View;

 import android.view.ViewGroup;

 import android.widget.AdapterView;

 import android.widget.AdapterView.OnItemSelectedListener;

 import android.widget.ArrayAdapter;

 import android.widget.Spinner;

 import android.widget.TextView;

 import android.widget.Toast;

 public class MainActivity extends Activity {

     private String[] start_citys, end_citys;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         start_citys = getResources().getStringArray(R.array.start_city);

         end_citys = getResources().getStringArray(R.array.end_city);

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

         spinner1.setAdapter(new MySpinnerAdapter(this, R.layout.item_start, R.id.TextView_start, start_citys));

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

         spinner2.setAdapter(new MySpinnerAdapter(this, R.layout.item_end, R.id.TextView_end, end_citys));

         spinner1.setOnItemSelectedListener(new OnItemSelectedListener() {

             @Override

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

                 Toast.makeText(getApplicationContext(), start_citys[position], 0).show();

             }

             @Override

             public void onNothingSelected(AdapterView<?> parent) {

             }

         });

         spinner2.setOnItemSelectedListener(new OnItemSelectedListener() {

             @Override

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

                 Toast.makeText(getApplicationContext(), end_citys[position], 0).show();

             }

             @Override

             public void onNothingSelected(AdapterView<?> parent) {

             }

         });

     }

     private class MySpinnerAdapter extends ArrayAdapter {

         private Context context;

         private int item;

         private int R_textView;

         private String[] citys;

         LayoutInflater inflater;

         public MySpinnerAdapter(Context context, int resource, int textViewResourceId, String[] citys) {

             super(context, resource, textViewResourceId, citys);

             this.context = context;

             this.item = resource;

             this.R_textView = textViewResourceId;

             this.citys = citys;

             inflater = LayoutInflater.from(context);

         }

         @Override

         public int getCount() {

             return citys.length;

         }

         // 下拉框中显示的view

         @Override

         public View getView(int position, View convertView, ViewGroup parent) {

             if (convertView == null) {

                 convertView = inflater.inflate(item, null);

             }

             TextView textView = (TextView) convertView.findViewById(R_textView);

             textView.setText(citys[position]);

             return convertView;

         }

         // 显示的是下拉的列表view

         // 如果数据没有从new的时候传递下来，那么不写这个方法有Resources$NotFoundException异常

         @Override

         public View getDropDownView(int position, View convertView, ViewGroup parent) {

             if (convertView == null) {

                 convertView = inflater.inflate(item, null);

             }

             TextView textView = (TextView) convertView.findViewById(R_textView);

             textView.setText(citys[position]);

             return convertView;

         }

     }

 }