在Spinner塞入复杂对象，取其key值和value值的解决办法。

网上找的都是使用String[]或者ArrayList<String>往Spinner里面塞数据，那假如是个复杂对象呢？比如：ArrayList<Company> 
其实，很简单，重写Company的toString()就可以了； 

public class Company {

    public String jjgsdm;//基金公司代码
    public String jjgsmc;//基金公司名称
    public String toString(){
        return jjgsmc;
    }
}

然后就可以使用了： 

private ArrayList<Company> companyList=new ArrayList<Company>();
companyList.add(Company0);
companyList.add(Company1);
companyList.add(Company2);
spinner=(Spinner)findViewById(R.id.simple_text_4);
adapter = new ArrayAdapter<Company>(mContext,android.R.layout.simple_spinner_item ,companyList);
adapter.setDropDownViewResource (android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
spinner.setPrompt("选择基金公司：");
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {

    @Override
    public void onItemSelected(AdapterView<?> parent, View view,
                    int position, long id) {
    // TODO Auto-generated method stub
                //String jjgsdm=((Company)spinner.getSelectedItem()).jjgsdm;
        String jjgsdm=companyList.get(position).jjgsdm;
        Log.i(tag,"基金公司代码="+jjgsdm);
    }

    @Override
    public void onNothingSelected(AdapterView<?> parent) {
    // TODO Auto-generated method stub

    }
});