我正在创建一个SportsApp,在我的NFL页面中,用户将选择他们想要查看的周,它不会显示用户选择的周,但会显示正确的数据.微调器显示默认的第1周文本,但加载所选周的正确值.
public class NFLWeekSpinner extends Fragment {
Spinner NFLspinner;
ArrayAdapter<CharSequence> spinnerAdapter;
String inputWeekFormatted;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.nfl_spinner_frag,container,false);
NFLspinner = view.findViewById(R.id.NFLSpinner);
spinnerAdapter = ArrayAdapter.createFromResource(this.getActivity(),R.array.weekNum,
android.R.layout.simple_spinner_item);
//spinnerAdapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
NFLspinner.setAdapter(spinnerAdapter);
NFLspinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
boolean user = false;
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
if(user) {
String selectedWeek = (String) parent.getItemAtPosition(position);
if (selectedWeek.length() > 6) {
inputWeekFormatted = selectedWeek.substring(5, 7);
} else {
inputWeekFormatted = selectedWeek.substring(5, 6);
}
((MainActivity) getActivity()).loadNFLscoreboard(inputWeekFormatted);
}
user = true;
// count++;
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
return view;
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
}
MainActivity.java
public class MainActivity extends AppCompatActivity {
private static final String BACK_ROOT_STACK = "root_fragment";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
DateFormat sdf = new SimpleDateFormat("yyyyMMdd");
//loadMLBScoreboard(defaultDate);
loadNavBar();
}
public void loadNavBar() {
final BottomNavigationView mBottomNav = findViewById(R.id.bottom_navigation);
final String defaultDate = "20180915";
mBottomNav.setItemIconTintList(null);
mBottomNav.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
mBottomNav.setItemIconTintList(null);
switch (item.getItemId()) {
case R.id.menu_nfl:
loadNFLscoreboard("1");
break;
case R.id.menu_baseball:
DateFormat sdf = new SimpleDateFormat("yyyyMMdd");
String today = sdf.format(Calendar.getInstance().getTime());
loadMLBScoreboard(defaultDate);
break;
default:
loadMLBScoreboard(defaultDate);
}
return true;
}
});
}
public void loadMLBScoreboard(String inputDate) {
LoadScoreboardFragment loadScoreboardFragment = new LoadScoreboardFragment();
loadMLBFragment(inputDate, loadScoreboardFragment);
}
private void loadMLBFragment(String inputDate, LoadScoreboardFragment loadScoreboardFragment) {
Bundle bundle = new Bundle();
//Load date Fragment
DateFragment dateFragment = new DateFragment();
bundle.putString("inputDateKey", inputDate);
loadScoreboardFragment.setArguments(bundle);
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction newFT = fragmentManager.beginTransaction();
newFT.add(loadScoreboardFragment, "Loading");
newFT.replace(R.id.holderFragment, dateFragment)
.addToBackStack(BACK_ROOT_STACK)
.commit();
}
public void loadNFLscoreboard(String nflWeek) {
LoadNFLscoreboardFragment loadNFLscoreboardFragment = new LoadNFLscoreboardFragment();
NFLWeekSpinner weekSpinner = new NFLWeekSpinner();
Bundle bundle = new Bundle();
bundle.putString("inputWeekKey",nflWeek);
loadNFLscoreboardFragment.setArguments(bundle);
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.main_recycle, loadNFLscoreboardFragment)
.commit();
fragmentManager.beginTransaction()
.replace(R.id.holderFragment,weekSpinner)
.addToBackStack(BACK_ROOT_STACK)
.commit();
}
}
R.array.WeekNum
<string-array name="weekNum">
<item>Week 1</item>
<item>Week 2</item>
<item>Week 3</item>
<item>Week 4</item>
<item>Week 5</item>
<item>Week 6</item>
<item>Week 7</item>
<item>Week 8</item>
<item>Week 9</item>
<item>Week 10</item>
<item>Week 11</item>
<item>Week 12</item>
<item>Week 13</item>
<item>Week 14</item>
<item>Week 15</item>
<item>Week 16</item>
<item>Week 17</item>
</string-array>
解决方法:
我终于想通了！！！在NFLSpinner.OnItemSelected调用中,一旦用户选择了新的一周,我就调用MainActivity loadNFLScoreboard方法,该方法在每次调用时创建一个新的Spinner实例.我将NFLWeekSpinner声明移到了loadNFLScoreboad方法之外,因为在每次调用时都没有创建新的微调器,所以正确显示了所选周.
感谢您的所有帮助@lionscribe
标签：android,android-spinner 来源： https://codeday.me/bug/20190701/1345690.html
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