Spinner

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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>

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