Spinner

效果图如下：

XML：

 <Spinner
        android:id="@+id/spinner_1"
        android:layout_below="@+id/Sprinner_text"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content">
    </Spinner>

JAVA：

第一种方法：

private static final String[] m_arr = {"a","b","c","d","e","f","g","h","i","j","k"};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setTitle("Spinner");
        setContentView(R.layout.activity_spin);
        Spinner _spin = (Spinner)findViewById(R.id.spinner_1);
        ArrayList<String> list_1=new ArrayList<String>();
        for(int i=0;i<m_arr.length;i++)
            list_1.add(m_arr[i]);
        ArrayAdapter<String> ada = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, list_1);
       // ArrayAdapter<String> ada = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, m_arr);  
        ada.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        _spin.setAdapter(ada);
        _spin.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){         //选择处理函数
            public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3){
                dispToast("选择的是"+m_arr[arg2]);
                Log.d("Spin","______________onCreate execute______________");
                arg0.setVisibility(View.VISIBLE);
            }
            public void onNothingSelected(AdapterView<?> arg0){
                                                //
            }
        }
        );

第二种方法 ： 用resource

Spinner _spin2 = (Spinner)findViewById(R.id.spinner_2);
    ArrayAdapter<CharSequence> ada2 = ArrayAdapter.createFromResource(this,R.array.countries,android.R.layout.simple_spinner_item);
ada2.setDropDownViewResource(android.R.layout.simple_spinner_item);
_spin2.setAdapter(ada2);
res：创建 array.xml文件
<resources>
    <string-array name="countries">
        <item>Mercury</item>
        <item>Venus</item>
        <item>Earth</item>
        <item>Mars</item>
        <item>Jupiter</item>
        <item>Saturn</item>
        <item>Uranus</item>
        <item>Neptune</item>
    </string-array>
</resources>