Android accept方法无法引发异常

我是android studio的新手，我有一个错误。我正在构建一个包含Cart的项目，CartActivity中的一个方法是抛出异常

 @Override
 public void accept(List<Cart> carts) throws Exception {
                  displayCartItem(carts);
                }

}

---

应用插件：“com.google.gms.google服务”

嘿，莎拉！你能把日志错误放在你的问题里吗？发布你的模块级别

build.gradle

file我发布了，请检查一下

apply plugin: 'com.android.application'

    android {
    compileSdkVersion 29
    buildToolsVersion "29.0.2"
    defaultConfig {
    applicationId "com.example.queueskip"
    minSdkVersion 23
    targetSdkVersion 29
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    multiDexEnabled true

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

 dependencies {
   implementation fileTree(dir: 'libs', include: ['*.jar'])
   implementation 'androidx.appcompat:appcompat:1.0.2'
   implementation 'com.google.android.material:material:1.0.0'
   implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
   implementation 'androidx.navigation:navigation-fragment:2.1.0'
   implementation 'androidx.navigation:navigation-ui:2.1.0'
   implementation 'androidx.lifecycle:lifecycle-extensions:2.1.0'
   implementation 'com.google.firebase:firebase-database:19.1.0'
   testImplementation 'junit:junit:4.12'
   androidTestImplementation 'androidx.test:runner:1.2.0'
   implementation 'com.google.firebase:firebase-auth:19.0.0'
    implementation 'com.ramotion.paperonboarding:paper-   onboarding:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'

implementation 'com.google.zxing:core:3.2.1'
implementation 'com.journeyapps:zxing-android-embedded:3.2.0@aar'

implementation 'com.wonderkiln:camerakit:0.13.1'
implementation 'com.google.firebase:firebase-core:17.2.0'
implementation 'com.google.firebase:firebase-ml-vision:23.0.0'
implementation 'com.github.d-max:spots-dialog:1.1@aar'
//noinspection GradleCompatible
implementation 'com.android.support:cardview-v7:27.1.1'
implementation 'androidx.recyclerview:recyclerview:1.0.0'
implementation 'com.google.android.material:material:1.0.0'
implementation 'com.cepheuen.elegant-number-button:lib:1.0.2'
implementation 'android.arch.persistence.room:runtime:1.0.0-alpha1'
annotationProcessor 'android.arch.persistence.room:compiler:1.0.0-alpha1'
implementation 'android.arch.lifecycle:compiler:1.0.0-alpha1'
implementation 'android.arch.persistence.room:rxjava2:1.0.0-alpha1'
///
implementation 'io.reactivex.rxjava2:rxjava:2.0.0'
implementation 'io.reactivex.rxjava2:rxandroid:2.0.0'
implementation 'com.squareup.picasso:picasso:2.3.3'
// Adds libraries defining annotations to only the compile classpath.
compileOnly 'com.google.dagger:dagger:2.24.0'
// Adds the annotation processor dependency to the annotation processor classpath.
annotationProcessor 'com.google.dagger:dagger-compiler:5.4.1'