使用RxJava時,有時會出現:io.reactivex.exceptions.UndeliverableException異常。
出現這個異常的原因大概是:調用了多次onError。正常來說第一次onError會走正常Observer處理,其他的會走ErrorHandler。可以通過如下方法捕捉多次的error,此方法只需要在Application中執行一次即可。
private void setRxJavaErrorHandler() {
RxJavaPlugins.setErrorHandler(new Consumer<Throwable>() {
@Override
public void accept(Throwable e) {
if (e instanceof UndeliverableException) {
e = e.getCause();
Log.d(TAG, "UndeliverableException=" + e);
return;
} else if ((e instanceof IOException)) {
// fine, irrelevant network problem or API that throws on cancellation
return;
} else if (e instanceof InterruptedException) {
// fine, some blocking code was interrupted by a dispose call
return;
} else if ((e instanceof NullPointerException) || (e instanceof IllegalArgumentException)) {
// that's likely a bug in the application
Thread.currentThread().getUncaughtExceptionHandler().uncaughtException(Thread.currentThread(), e);
return;
} else if (e instanceof IllegalStateException) {
// that's a bug in RxJava or in a custom operator
Thread.currentThread().getUncaughtExceptionHandler().uncaughtException(Thread.currentThread(), e);
return;
}
Log.d(TAG, "unknown exception=" + e);
}
});
}