[英]Fragment doesn't automatically update on clicking
我的操作欄中有一個片段,如果用戶單擊片段按鈕,則頁面中如果有任何內容,應自動更新/刷新。 我面臨的問題是,片段不會在第一次自動更新,而是在我第二次按下時更新和刷新。
這是流程:
選擇片段1->不更新/刷新->返回並從操作欄中選擇另一個片段2->再次選擇片段1->更新片段1的用戶界面。
我在異步任務的onPostExecute中從MainActivity調用片段1。
主要活動,
private final FragmentOne f1 = new FragmentOne();
@Override
protected void onPostExecute(Object o) {
super.onPostExecute(o);
f1.updateUI();
}
我的片段類中有這段代碼。
// Updates the fragment-1 UI
public void updateUI() {
if (isAdded()) {
String currentDatabaseName = null;
hideAllTables();
hideWarningLabelsAndHeaders();
progressBarIndicator.setVisibility(View.VISIBLE);
if (null != getUserIdentifier()) {
currentDatabaseName = Utils.buildUserDataFromFli(getUserIdentifier());
}
if (null != currentDatabaseName) {
shopData = new ShopDao(ShopApplication.getLoggedInUser(), Utils.getDatabaseIndexMap());
transcationData = new TranscationDao(ShopApplication.getLoggedInUser(), Utils.getDatabaseIndexMap());
}
configureUserDependentFetchers(getUserIdentifier());
}
}
試試這個,也許為你工作;)
活動中:
@Override
protected void onPostExecute(Object o) {
super.onPostExecute(o);
//to send broadcast for refresh
Intent intentRefresh = new Intent("com.yourapp.REFRESH_DATA");
LocalBroadcastManager.getInstance(YourActivity.this).sendBroadcast(intentRefresh);
}
在您的片段上:
private final BroadcastReceiver broadcastReceiverMap = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action.equals("com.yourapp.REFRESH_DATA")) {
//put here code for refresh
}
}
};
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_one, container, false);
//register your LocalBroadcatManager
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction("com.yourapp.REFRESH_DATA");
LocalBroadcastManager.getInstance(getActivity()).registerReceiver(
broadcastReceiverMap, intentFilter);
return view;
}
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