我正在用Android / Java运行一个程序来模拟运动队的赛季，因为我有Team对象。我有一个Model类，用于通过ContentResolver / ContentProvider与数据库进行通信。
我正在使用RxJava与Schedulers.io线程上的数据库进行通信，以免阻塞主线程。
在我的“ InsertTeam”方法中，我可以很好地插入数据库中。但是，在我的“ UpdateTeam”方法中，未运行可观察项/订阅，并且我的数据库未得到更新（即，调用了该方法，但未运行可观察项-没有任何反应）。
但是，如果我在AndroidSchedulers.mainThread（）上运行可观察到的UpdateTeam，则它可以工作（但会降低程序速度）！
这对我来说没有任何意义。有谁知道为什么我的可观察更新可以在MainThread上运行而不能在Schedulers.io线程上运行？
InsertTeamMethod
@Override
public void insertTeam(final Team team) {
//Insert a team into the database
Observable<Uri> insertTeamObservable = Observable.fromCallable(new Callable<Uri>() {
@Override
public Uri call() throws Exception {
String name = team.getName();
double elo = team.getELO();
double offRating = team.getOffRating();
double defRating = team.getDefRating();
int currentWins = team.getWins();
int currentLosses = team.getLosses();
int currentDraws = team.getDraws();
int division = team.getDivision();
ContentValues values = new ContentValues();
values.put(TeamEntry.COLUMN_TEAM_NAME, name);
values.put(TeamEntry.COLUMN_TEAM_ELO, elo);
values.put(TeamEntry.COLUMN_TEAM_OFF_RATING, offRating);
values.put(TeamEntry.COLUMN_TEAM_DEF_RATING, defRating);
values.put(TeamEntry.COLUMN_TEAM_CURRENT_WINS, currentWins);
values.put(TeamEntry.COLUMN_TEAM_CURRENT_LOSSES, currentLosses);
values.put(TeamEntry.COLUMN_TEAM_CURRENT_DRAWS, currentDraws);
values.put(TeamEntry.COLUMN_TEAM_DIVISION, division);
//Insert values into database
Uri uri = contentResolver.insert(TeamEntry.CONTENT_URI, values);
return uri;
}
});
insertTeamObservable.subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(new Observer<Uri>() {
@Override
public void onSubscribe(Disposable d) {
mCompositeDisposable.add(d);
}
@Override
public void onNext(Uri uri) {
team.setUri(uri);
}
@Override
public void onError(Throwable e) {
}
@Override
public void onComplete() {
}
});
}
UpdateTeamMethod
@Override
public void updateTeam(final Team team) {
//Update a team in the database
Log.d("Before team obs", "" + team.getName());
Observable<Integer> updateTeamObservable = Observable.fromCallable(new Callable<Integer>() {
@Override
public Integer call() throws Exception {
//Update team database wins, losses and win loss pct values
ContentValues values = new ContentValues();
values.put(TeamEntry.COLUMN_TEAM_CURRENT_WINS, team.getWins());
values.put(TeamEntry.COLUMN_TEAM_CURRENT_LOSSES, team.getLosses());
values.put(TeamEntry.COLUMN_TEAM_CURRENT_DRAWS, team.getDraws());
values.put(TeamEntry.COLUMN_TEAM_WIN_LOSS_PCT, team.getWinLossPct());
int rowsUpdated = contentResolver.update(team.getUri(), values, null, null);
Log.d("Team updated: ", "" + team.getName());
return rowsUpdated;
}
});
updateTeamObservable.subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(new Observer<Integer>() {
@Override
public void onSubscribe(Disposable d) {
mCompositeDisposable.add(d);
}
@Override
public void onNext(Integer rowsUpdated) {
Log.d("Team rows updated: ", " " + rowsUpdated);
}
@Override
public void onError(Throwable e) {
}
@Override
public void onComplete() {
}
});
}