Android基础_Spinner使用记录

两种选择样式：
android:spinnerMode="dropdown"  下拉框样式
android:spinnerMode="dialog"    弹窗样式

// 默认选择第一项 onItemSelected --> position == 0
sp.setAdapter(new SpinnerStringAdapter(context, list));
sp.setOnItemSelectedListener(listener);

// 选择最后一次设置的项 onItemSelected  --> position == 3(0-2的都不走)
sp.setAdapter(new SpinnerStringAdapter(context, list));
sp.setOnItemSelectedListener(listener);
sp.setSelection(0);
sp.setSelection(1);
sp.setSelection(2);
sp.setSelection(3);

// 设置监听顺序也无关 onItemSelected  --> position == 3(0-2的都不走)
sp.setAdapter(new SpinnerStringAdapter(context, list));
sp.setSelection(0);
sp.setSelection(1);
sp.setSelection(2);
sp.setSelection(3);
sp.setOnItemSelectedListener(listener);