下拉菜单-Spinner

标记：

<Spinner android:id="@+id/feet"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:drawSelectorOnTop="true"  ----最上层

android:prompt="@string/feet_prompt"  -------菜单名称

/>

 

//保存Spinner的选择信息

protected void onPause() {

// TODO Auto-generated method stub

super.onPause();

// Save user preferences.

SharedPreferences settings = getSharedPreferences(PREF, 3);

settings.edit()

.putInt(PREF_FEET, field_feet.getSelectedItemPosition())

.commit();

}

 

 

//读取Spinner的选择信息

private void restorePrefs() {

SharedPreferences settings = getSharedPreferences(PREF, 0);

//set field

Integer pref_feet = settings.getInt(PREF_FEET, 5);

field_feet.setSelection(pref_feet);

field_inch.requestFocus();

}

 

 

ArrayAdapter<CharSequence> adapter_feet = ArrayAdapter.createFromResource(

this, R.array.feets, android.R.layout.simple_spinner_item);

adapter_feet.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

field_feet.setAdapter(adapter_feet);

 

 

private Button.OnClickListener calcUsBMI = new Button.OnClickListener() {

public void onClick(View v) {

DecimalFormat nf = new DecimalFormat("0.00");

try {

//Present result

view_result.setText(getText(R.string.bmi_result) + nf.format(BMI));

//Give health advice

  

...//省略

  

} catch(Exception obj) {

Toast.makeText(Abmi.this, getString(R.string.input_error), Toast.LENGTH_SHORT).show();

}

}

};