我嘗試更新通過調用notifyDataSetChanged()
微調視圖。但它沒有更新。下面安卓:微調沒有更新我的看法時notifyDataSetChanged()被調用
是我的活動:
public class DisplayArchive2 extends AppCompatActivity {
List<String> yearslist;
Spinner spinner;
ArrayAdapter<String> dataAdapter;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.archive2);
spinner = (Spinner) findViewById(R.id.year_spinner);
yearslist = new ArrayList<String>();
yearslist.add("2017");
yearslist.add("2016");
yearslist.add("2015");
yearslist.add("2014");
yearslist.add("2013");
dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,yearslist);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(dataAdapter);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
yearslist.clear();
yearslist.add("2010");
yearslist.add("2009");
yearslist.add("2008");
yearslist.add("2007");
yearslist.add("2006");
dataAdapter.notifyDataSetChanged();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
}
年的名單並沒有改變在選擇任何一年。
它看起來像下面
嘗試在數據集應該改變 – hornet2319