LiveData多次收到消息毁腿，方案來(lái)自Stackoverflow某位Google工程師
import androidx.annotation.MainThread;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.lifecycle.LifecycleOwner;
import androidx.lifecycle.MutableLiveData;
import androidx.lifecycle.Observer;
import java.util.concurrent.atomic.AtomicBoolean;
public class SingleLiveEvent<T> extends MutableLiveData<T> {
private final AtomicBoolean mPending = new AtomicBoolean(false);
@Override
public void observe(@NonNull LifecycleOwner owner, @NonNull final Observer<? super T> observer) {
super.observe(owner, new Observer<T>() {
@Override
public void onChanged(@Nullable T t) {
if (mPending.compareAndSet(true, false)) {
observer.onChanged(t);
}
}
});
}
@MainThread
public void setValue(@Nullable T t) {
mPending.set(true);
super.setValue(t);
}
}
