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我正在嘗試保存微調器選擇狀態。因此,如果我在微調器中選擇一個選項並移動到另一個活動中,那麼使用微調器返回該活動,該選擇仍應該被選中。我發現了一些教程,但我嘗試過的教程已被棄用。如何使用Java來保存微調器狀態Android
這裏是我的微調:
//language selection list
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
this, R.array.language_list, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// storing string resources into Array
lang_list = getResources().getStringArray(R.array.language_list);
Toast.makeText(getBaseContext(), "You have selected : " + lang_list[index],
Toast.LENGTH_SHORT).show();
choice = spinner.getSelectedItem().toString();
final ImageView country_flag = (ImageView)findViewById(R.id.country);
String s=((TextView)arg1).getText().toString();
if(s.equals("English"))
country_flag.setImageDrawable(getResources().getDrawable(R.drawable.eng_spinner));
if(s.equals("German"))
country_flag.setImageDrawable(getResources().getDrawable(R.drawable.german_spinner));
if(s.equals("French"))
country_flag.setImageDrawable(getResources().getDrawable(R.drawable.french_spinner));
if(s.equals("Spanish"))
country_flag.setImageDrawable(getResources().getDrawable(R.drawable.spanish_spinner));
}