标签：android style blog http io ar color os sp
Spinner用来显示列表项，类似于一组单选框RadioButton.下面瞥一下它的效果。
一、概述
Spinner是一个每次只能选择所有项的一个项的控件。它的项来自于与之相关联的适配器中。
二、重要属性
android:prompt：当Spinner对话框关闭时显示该提示
三、重要方法
setPrompt(CharSequence prompt)：设置当Spinner对话框关闭时显示的提示
performClick()：如果它被定义就调用此视图的OnClickListener
setOnItemClickListener(AdapterView.OnItemClickListener l)：当项被点击时调用
onDetachedFromWindow()：当Spinner脱离窗口时被调用。
四、完整代码
public class SpinnerDemo extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.spinnerpage); Spinner s1 = (Spinner) findViewById(R.id.spinnercolor); ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource( this, R.array.colors, android.R.layout.simple_spinner_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); s1.setAdapter(adapter); s1.setOnItemSelectedListener( new OnItemSelectedListener() { public void onItemSelected( AdapterView<?> parent, View view, int position, long id) { showToast("Spinner1: position=" + position + " id=" + id); } public void onNothingSelected(AdapterView<?> parent) { showToast("Spinner1: unselected"); } }); Spinner s2 = (Spinner) findViewById(R.id.spinnerplanet); adapter = ArrayAdapter.createFromResource(this, R.array.planets, android.R.layout.simple_spinner_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); s2.setAdapter(adapter); s2.setOnItemSelectedListener( new OnItemSelectedListener() { public void onItemSelected( AdapterView<?> parent, View view, int position, long id) { showToast("Spinner2: position=" + position+1 + " id=" + id+1); } public void onNothingSelected(AdapterView<?> parent) { showToast("Spinner2: unselected"); } }); } private void showToast(CharSequence msg) { Toast.makeText(this, msg, Toast.LENGTH_SHORT).show(); } }
转自:http://www.cnblogs.com/salam/archive/2010/10/07/1844980.html
标签：android style blog http io ar color os sp
原文地址：http://www.cnblogs.com/welcoming/p/4143475.html
