如何将 FirebaseApp.initializeApp 用于 FirebaseRemoteConfig

Question

我正在尝试使用 FirebaseApp.initializeApp，但它不起作用。我有正确的库，但我无法使用 JSON 文件来初始化应用程序

这是我的代码：

进口

import com.google.firebase.FirebaseApp;
import com.google.firebase.FirebaseOptions;
import com.google.firebase.remoteconfig.FirebaseRemoteConfig;
import com.google.firebase.remoteconfig.FirebaseRemoteConfigSettings;

变量

private FirebaseRemoteConfig mFirebaseRemoteConfig;

private String projectID;
private String apiKey;
private String appID;

我如何初始化应用程序

public void Initialize() {
    FirebaseOptions mFirebaseOptions = new FirebaseOptions.Builder()
        .setApplicationId(this.appID)
        .setApiKey(this.apiKey)
        .build();
    FirebaseApp.initializeApp(this.context, mFirebaseOptions, this.projectID);
    mFirebaseRemoteConfig = FirebaseRemoteConfig.getInstance();
}

应用程序在启动时崩溃，这是 logcat 错误：

12-04 22:11:42.217 12566 12566 E AndroidRuntime: FATAL EXCEPTION: main
12-04 22:11:42.217 12566 12566 E AndroidRuntime: Process: com.makeroid.sanderjochems.FirebaseRemoteConfig, PID: 12566
12-04 22:11:42.217 12566 12566 E AndroidRuntime: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/common/internal/zzby;
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at com.google.firebase.FirebaseOptions.fromResource(Unknown Source)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at com.google.firebase.FirebaseApp.initializeApp(Unknown Source)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at com.google.appinventor.components.runtime.FirebaseRemoteConfiguration.<init>(FirebaseRemoteConfiguration.java:67)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at java.lang.reflect.Constructor.newInstance0(Native Method)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at java.lang.reflect.Constructor.newInstance(Constructor.java:430)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at gnu.expr.PrimProcedure.apply(PrimProcedure.java:272)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at gnu.mapping.CallContext.runUntilDone(CallContext.java:234)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at gnu.mapping.CallContext.runUntilValue(CallContext.java:298)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at gnu.kawa.reflect.Invoke.applyN(Invoke.java:209)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at gnu.mapping.ProcedureN.apply2(ProcedureN.java:39)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at com.makeroid.sanderjochems.FirebaseRemoteConfig.Screen1.$define(Screen1.yail:10182)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at com.google.appinventor.components.runtime.Form.onCreateFinish(Form.java:389)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at com.google.appinventor.components.runtime.Form.onCreate(Form.java:336)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at android.app.Activity.performCreate(Activity.java:6942)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1126)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2880)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2988)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at android.app.ActivityThread.-wrap14(ActivityThread.java)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1631)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at android.os.Handler.dispatchMessage(Handler.java:102)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at android.os.Looper.loop(Looper.java:154)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at android.app.ActivityThread.main(ActivityThread.java:6682)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at java.lang.reflect.Method.invoke(Native Method)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)
12-04 22:11:42.217 12566 12566 E AndroidRuntime: Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.common.internal.zzby" on path: DexPathList[[zip file "/data/app/com.makeroid.sanderjochems.FirebaseRemoteConfig-1/base.apk"],nativeLibraryDirectories=[/data/app/com.makeroid.sanderjochems.FirebaseRemoteConfig-1/lib/arm64, /system/lib64, /vendor/lib64]]
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
12-04 22:11:42.217 12566 12566 E AndroidRuntime:        ... 25 more

Answer 1

可能存在多个问题。我会指出似乎是一个。

RemoteConfig.getInstance() 的文档指出它期望 默认 FirebaseApp 被初始化：

FirebaseRemoteConfig 使用默认的 FirebaseApp...

与其他一些 Firebase API 不同，无法使用不同的 FirebaseApp 初始化 RemoteConfig。

这意味着当你初始化FirebaseApp时，projectID必须是“[DEFAULT]”，它可以作为常量FirebaseApp.DEFAULT_APP_NAME使用。

FirebaseApp.initializeApp(this.context, mFirebaseOptions, this.projectID);

尝试将projectID 设置为“[DEFAULT]”（或可用常量）以查看故障是否更改或已解决。

Answer 2

在生成应用程序时禁用instant-run，并确保您已将google-services.json 文件添加到您的项目中。

Answer 3

嘿，我建议一些解决方案 -

1. Build.gradle 文件

   multiDexEnabled true
   

2. 将此添加到您的 proguard-rules.pro 文件中

   -keep public class com.google.android.gms.* { public *; }