Spinner簡單實例

Spinner簡單實例


參考文章在此

見下圖

一個TextView與一個Spinner，spinner內容包含三個選項，而TextView將所選到的項目名稱顯示出來。

程式碼：

public class SpinnerEx extends Activity {

    private Spinner spinner;
    private TextView textView;
    private ArrayAdapter<String> adapter;
    
    private List< String> list=new ArrayList< String>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_spinner_ex);
        textView=(TextView) findViewById(R.id.textView);
        spinner=(Spinner)findViewById(R.id.spinner);
        //添加列表內容
        list.add("option1");
        list.add("option2");
        list.add("option3");
        //為spinner建立adapter
        adapter=new ArrayAdapter<String>(this,
                android.R.layout.simple_spinner_item,
                list);
        //設定下拉選單樣式
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        //設定adapter
        spinner.setAdapter(adapter);
        //spinner事件處理
        spinner.setOnItemSelectedListener(new OnItemSelectedListener(){
        
            @Override
            public void onItemSelected(AdapterView<?> parent, View view,
                    int position, long id) {
                // TODO Auto-generated method stub
                /* 将所选mySpinner 的值带入myTextView 中*/
                textView.setText("您选择的是："+ adapter.getItem(position));
                /* 将mySpinner 显示*/
                parent.setVisibility(View.VISIBLE);
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {
                // TODO Auto-generated method stub
                textView.setText("NONE");
                parent.setVisibility(View.VISIBLE);
            }
            
        });
        spinner.setOnTouchListener(new OnTouchListener(){

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                // TODO Auto-generated method stub
                /* 将mySpinner 隐藏，不隐藏也可以，看自己爱好*/
                v.setVisibility(View.INVISIBLE);
                return false;
            }
            
        });
        spinner.setOnFocusChangeListener(new OnFocusChangeListener(){

            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                // TODO Auto-generated method stub
                v.setVisibility(View.VISIBLE);
            }
            
        });
        
        
    }
}