Desidero popolare un cassetto di navigazione sottoscrivendo un Observable
che ottiene i dati da un db e al termine, notifica l'utente (utilizzando RxJava
). Ho fatto qualcosa di simile con la Subscriber
che è una classe che si estende Fragment
, ma questo è diverso in quanto il Navigation Drawer non è un frammento separato, ma piuttosto, è definito in MainActivity.Sottoscrizione di un cassetto di navigazione a un osservabile
Come si sottoscrive lo Navigation Drawer
su Observable
?
MainActivity.java
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
@Override
public void onStart() { mLoadAndStoreDataObservable = Observable.create(
super.onStart(); new Observable.OnSubscribe<String>() {
// fragment creation code was here
// populates a String[] myStringArray for Navigation Drawer permitsSQLiteManager.addLogLine(mActivity, logString);
if (!skipRestfulServiceCall) {
getDataFromRestfulService(); }
} catch (Exception e) {
else { // get data from SQLite Log.e("loadAndStoreData ", "Exception: " + e.getMessage());
getDataFromSQLite(); mProgressDialog.dismiss();
} }
}
mTitle = mDrawerTitle = getTitle(); }
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); .subscribeOn(Schedulers.io())
mDrawerList = (ListView) findViewById(R.id.left_drawer); .observeOn(AndroidSchedulers.mainThread())
.subscribe(mDrawerLayout); // parameter was a Fragment
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
mDrawerList.setAdapter(new ArrayAdapter<String>(this, R.layout.drawer_list_item, myStringArray));
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
// enable ActionBar app icon to behave as action to toggle nav drawer
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
mDrawerToggle = new ActionBarDrawerToggle(this,mDrawerLayout, R.drawable.ic_drawer, R.string.drawer_open,R.string.drawer_close
) {
public void onDrawerClosed(View view) {
getActionBar().setTitle(mTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(mDrawerTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
}
private void getDataFromRestfulService() {
<get data>
// implement RxJava-Observable/Subscriber
mLoadAndStoreDataObservable = Observable.create(
new Observable.OnSubscribe<String>() {
@Override
public void call(Subscriber<? super String> subscriber) {
try {
Utilities.loadAndStoreData(mActivity);
subscriber.onNext("Utilities.loadAndStoreData Done");
//subscriber.onCompleted();
Log.e("MainActivity.onCreate()", "subscriber.onNext(\"Utilities.loadAndStoreData Done\")");
String logString = "MainActivity.onCreate() - subscriber.onNext(Utilities.loadAndStoreData Done)";
Log.e(TAG, logString);
PermitsSQLiteManager permitsSQLiteManager = PermitsSQLiteManager.getInstance();
permitsSQLiteManager.addLogLine(mActivity, logString);
mProgressDialog.dismiss();
}
catch (Exception e) {
Log.e("loadAndStoreData ", "Exception: " + e.getMessage());
subscriber.onError(e);
mProgressDialog.dismiss();
}
}
}
)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(mDrawerLayout); // compile error // suscriber was a Fragment, but no longer
}
'mDrawerLayout' è * non * un'istanza di una classe che implementa' Observer'. è 'android.support.v4.widget.DrawerLayout'. –
Quindi si applica la fine della mia risposta: crea un nuovo osservatore che chiama i metodi nel tuo layout del cassetto. – dwursteisen