4

在真实设备（Nexus 5、Leeco、小米...）上，.observe 方法有效，但是当我在 Firebase 测试实验室开始测试时，应用程序在许多设备上开始崩溃并出现异常（例如，具有 22 个 api 的虚拟 Nexus 10 ):

java.lang.RuntimeException: Unable to start activity ComponentInfo ...
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.arch.lifecycle.Lifecycle$State android.arch.lifecycle.Lifecycle.getCurrentState()' on a null object reference
  at android.arch.lifecycle.LiveData.observe(LiveData.java:188)

在活动中：

public class ActivityCabinet extends AppCompatActivity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_cabinet);
      vmCabinet = ViewModelProviders.of(this).get(VmActivityCabinet.class);
      vmCabinet.enumSideNavigationMode.setValue(EnumSideNavigationMode.MAIN_LIST);

      // crash happens here in Test Lab
      vmCabinet.enumSideNavigationMode.observe(this, enumSideNavigationMode -> {
        ...
      }
  }
}

在毕业典礼上：

dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'com.android.support:appcompat-v7:27.0.0'
implementation 'com.android.support:customtabs:27.0.0'
implementation 'com.android.support:cardview-v7:27.0.0'
implementation 'com.android.support:recyclerview-v7:27.0.0'
implementation 'com.android.support:design:27.0.0'
implementation 'com.android.support:support-v4:27.0.0'
implementation 'com.android.support:transition:27.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'

implementation 'android.arch.lifecycle:extensions:1.0.0-rc1'

implementation 'android.arch.persistence.room:runtime:1.0.0-rc1'
annotationProcessor "android.arch.persistence.room:compiler:1.0.0-rc1"

implementation 'com.android.support:multidex:1.0.2'
implementation 'me.relex:circleindicator:1.2.2@aar'
implementation 'com.google.android.exoplayer:exoplayer:r2.5.0-beta1'
implementation 'com.google.code.gson:gson:2.8.0'
implementation 'com.squareup.retrofit2:retrofit:2.3.0'
implementation 'com.squareup.retrofit2:converter-scalars:2.3.0'
implementation 'com.squareup.retrofit2:converter-gson:2.3.0'
implementation 'com.squareup.okhttp3:logging-interceptor:3.8.1'
implementation 'com.squareup.picasso:picasso:2.5.2'
implementation 'com.thoughtbot:expandablerecyclerview:1.3'
implementation 'com.facebook.android:facebook-android-sdk:4.25.0'
implementation 'com.appsflyer:af-android-sdk:4.8.3@aar'
implementation 'com.google.firebase:firebase-core:11.4.2'
implementation 'com.google.android.gms:play-services-ads:11.4.2'
implementation('com.crashlytics.sdk.android:crashlytics:2.7.1@aar') {
    transitive = true
}
}
apply plugin: 'com.google.gms.google-services'

主要等级

buildscript {
    repositories {
        google()
        jcenter()
        mavenLocal()
        mavenCentral()
        maven { url 'https://maven.google.com' }
        maven { url 'https://maven.fabric.io/public'}
        maven { url 'https://oss.sonatype.org/content/repositories/snapshots'}
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.0-alpha01'
        classpath 'com.google.gms:google-services:3.1.1'
        classpath 'io.fabric.tools:gradle:1.24.1'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        mavenLocal()
        mavenCentral()
        maven { url 'https://maven.fabric.io/public'}
        maven { url 'https://oss.sonatype.org/content/repositories/snapshots'}
        maven { url "https://maven.google.com"}
    }
}

我无法理解测试实验室中设备异常的原因。

4

1 回答 1

0

同样在这里。多个报告出现在互联网上。似乎已经开始或在 10 月 27 日左右。我通过在 Google Play 控制台中选择退出新功能“发布前报告版本”解决了这个问题（发布管理->发布前报告->设置->发布前报告版本

于 2017-11-06T06:03:48.303 回答