Android 工作室找不到 class wearos 瓷砖的期货

Question

我的意图是为 wearos 创建磁贴。我遇到的问题是找不到此“Futures”所需的 class。它应该位于 com.google.common.util.concurrent.Futures 但 android studio 找不到它。

我的构建错误状态如下：

/home/user/AndroidStudioProjects/yyy/app/src/main/java/com/xxx/yyy/services/TileService.java:13: error: cannot find symbol
import com.google.common.util.concurrent.Futures;
                                        ^
  symbol:   class Futures
  location: package com.google.common.util.concurrent

这导致了一个明显的事实，即我不能在我的代码中使用这个 class，所以我的其余错误只说“找不到符号 method/variable 期货”。

我的build.gradle如下：

plugins {
    id 'com.android.application'
}

android {
    compileSdk 31

    defaultConfig {
        applicationId "com.xxx.yyy"
        minSdk 28
        targetSdk 30
        versionCode 1
        versionName "1.0"

    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    buildFeatures {
        viewBinding true
    }
}

dependencies {

    implementation 'com.google.android.gms:play-services-wearable:17.0.0'
    implementation 'androidx.percentlayout:percentlayout:1.0.0'
    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
    implementation 'androidx.recyclerview:recyclerview:1.2.0'
    implementation 'androidx.wear:wear:1.2.0'

    /* for tiling: */
    // Use to implement support for wear tiles
    implementation 'androidx.wear.tiles:tiles:1.0.0'
    implementation "androidx.concurrent:concurrent-futures:1.1.0"

    // Use to preview wear tiles in our own app
    debugImplementation 'androidx.wear.tiles:tiles-renderer:1.0.0'

    // Use to fetch tiles from a tile provider in our tests
    testImplementation 'androidx.wear.tiles:tiles-testing:1.0.0'
}

TileService.java:

package com.elvigo.spotprice.services;

import androidx.annotation.NonNull;
import androidx.wear.tiles.LayoutElementBuilders.Text;
import androidx.wear.tiles.LayoutElementBuilders.Layout;
import androidx.wear.tiles.RequestBuilders;
import androidx.wear.tiles.ResourceBuilders;
import androidx.wear.tiles.TileBuilders.*;
import androidx.wear.tiles.TimelineBuilders.TimelineEntry;
import androidx.wear.tiles.TimelineBuilders.Timeline;

import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.Futures; // <-- Error here

public class TileService extends androidx.wear.tiles.TileService {
    private static final String RESOURCES_VERSION = "1";

    @NonNull
    @Override
    protected ListenableFuture<Tile> onTileRequest(
            @NonNull RequestBuilders.TileRequest requestParams
    ) {
        return Futures(new Tile.Builder()
                .setResourcesVersion(RESOURCES_VERSION)
                .setTimeline(new Timeline.Builder()
                        .addTimelineEntry(new TimelineEntry.Builder()
                                .setLayout(new Layout.Builder()
                                        .setRoot(new Text.Builder()
                                                .setText("Hello world!").build()
                                        ).build()
                                ).build()
                        ).build()
                ).build()
        ).build();
    }

    @NonNull
    @Override
    protected ListenableFuture<ResourceBuilders.Resources> onResourcesRequest(
            @NonNull RequestBuilders.ResourcesRequest requestParams
    ) {
        return Futures.immediateFuture(new ResourceBuilders.Resources.Builder()
                .setVersion(RESOURCES_VERSION)
                .build()
        );
    }
}

我该如何解决这个问题？

Answer 1

期货可以在这里找到：

implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-guava:1.5.1'

Answer 2

番石榴期货住在这里

// https://mvnrepository.com/artifact/com.google.guava/guava
implementation("com.google.guava:guava:31.0.1-android")

kotlinx-coroutines-guava 恰好依赖于它，所以如果你也想要协程，请使用它。

Android 工作室找不到 class wearos 瓷砖的期货

Android studio cannot find class Futures for wearos tiles

java

android

android-studio

wear-os

wear-os-tiles