在 Android 中使用 Room-Guava，找不到 ListenableFuture

Question

I'm following this: https://developer.android.com/training/data-storage/room/async-queries

I'm trying to use ListenableFuture from Guava, so I included androidx.room:room-guava but Android Studio keeps complaining that " Cannot resolve symbol 'ListenableFuture' " and doesn't suggest any relevant import .

What is the correct import to include in Java source?

Here is my code:

---

build.gradle(:app)

...
// Guava support for Room, including Optional and ListenableFuture
implementation "androidx.room:room-guava:2.4.3"

---

Java DAO interface

import androidx.room.Dao;
import androidx.room.Insert;

@Dao
public interface PressureMeasureDao
{
    @Insert
    public ListenableFuture<Integer> insertPressureMeasure(PressureMeasure pressureMeasure);
}

Answer 1

According to https://mvnrepository.com/artifact/androidx.room/room-guava/2.4.3 androidx.concurrent:concurrent-futures is a runtime dependency. Please check if https://mvnrepository.com/artifact/androidx.concurrent/concurrent-futures is present. ListenableFuture comes from its transitive dependency https://mvnrepository.com/artifact/com.google.guava/listenablefuture/1.0 .