AndroidX和FirebaseFirestore提供了java.lang.RuntimeException

时间：2018-09-25 21:40:54

标签： java android google-cloud-firestore androidx

我刚刚开始迁移项目以使用Firebase和AndroidX，据我所知，我不得不做一些我不应该做的事情：我不得不降级Google服务的类路径。

我犯了什么错误，这意味着我不能使用最新版本（4.1.0）？我有一个正在运行的应用程序，所以我不会太沮丧，我只想知道我做错了什么！

我在最新的4.1.0版本中遇到的错误：

09-25 20:54:38.152 5311-5311/com.iainism.joebot E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.iainism.joebot, PID: 5311
    java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.iainism.joebot/com.iainism.joebot.MainActivity}: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.iainism.joebot. Make sure to call FirebaseApp.initializeApp(Context) first.
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2121)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
        at android.app.ActivityThread.access$800(ActivityThread.java:135)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:136)
        at android.app.ActivityThread.main(ActivityThread.java:5017)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
        at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.iainism.joebot. Make sure to call FirebaseApp.initializeApp(Context) first.
        at com.google.firebase.FirebaseApp.getInstance(com.google.firebase:firebase-common@@16.0.1:219)
        at com.google.firebase.firestore.FirebaseFirestore.getInstance(com.google.firebase:firebase-firestore@@17.0.5:49)
        at com.iainism.joebot.MainActivity.<init>(MainActivity.java:32)
        at java.lang.Class.newInstanceImpl(Native Method)
        at java.lang.Class.newInstance(Class.java:1208)
        at android.app.Instrumentation.newActivity(Instrumentation.java:1061)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2112)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 
        at android.app.ActivityThread.access$800(ActivityThread.java:135) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
        at android.os.Handler.dispatchMessage(Handler.java:102) 
        at android.os.Looper.loop(Looper.java:136) 
        at android.app.ActivityThread.main(ActivityThread.java:5017) 
        at java.lang.reflect.Method.invokeNative(Native Method) 
        at java.lang.reflect.Method.invoke(Method.java:515) 
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
        at dalvik.system.NativeStart.main(Native Method) 

-项目buidle.gradle：

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

    repositories {
        google()
        jcenter()
}
    dependencies {
        classpath 'com.android.tools.build:gradle:3.3.0-alpha11'
        classpath 'com.google.gms:google-services:4.0.0'  //4.1.0 Crashes app on start

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        mavenCentral()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

-应用程序build.gradle：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.iainism.joebot"
        minSdkVersion 19
        targetSdkVersion 28
        multiDexEnabled true
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "androidx.legacy:legacy-support-core-utils:1.0.0"
    implementation 'com.google.android.material:material:1.0.0'
    implementation 'com.google.firebase:firebase-core:16.0.3'
    implementation 'com.google.firebase:firebase-firestore:17.1.0'
    implementation 'androidx.multidex:multidex:2.0.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.1.0-alpha4'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0-alpha4'
}

apply plugin: 'com.google.gms.google-services'

-MainActivity.java：

package com.iainism.joebot;

import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.firebase.firestore.DocumentReference;
import com.google.firebase.firestore.FirebaseFirestore;

import java.util.HashMap;
import java.util.Map;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.multidex.MultiDex;

public class MainActivity extends AppCompatActivity {
    private static final String LOG_TAG = MainActivity.class.getSimpleName();

    // TODO: Add authentication
    // TODO: Change security rules

    // TODO: Rework content provider to do all CRUD via Firestore

    private DocumentReference mDocRef = FirebaseFirestore.getInstance().document("FirstGo/Test");

    @Override
    protected void attachBaseContext(Context newBase) {
        super.attachBaseContext(newBase);
        MultiDex.install(this);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        // Set-up Toolbar
        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        // Set-up FAB
        FloatingActionButton floatingActionButton = findViewById(R.id.floating_action_button);

        floatingActionButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Log.d(LOG_TAG, "FAB clicked!");
                // TODO: add proper action
            }
        });

        // Set up Firebase Firestore
        Map<String , Object> cloudData = new HashMap<>();
        cloudData.put("data", "This is a test!");

        mDocRef.set(cloudData).addOnCompleteListener(new OnCompleteListener<Void>() {
            @Override
            public void onComplete(@NonNull Task<Void> task) {
               if(task.isSuccessful()) {
                   Log.d(LOG_TAG, "Created Firestore document");
               } else {
                   Log.w(LOG_TAG, "Failed to create Firestore document", task.getException());
               }
            }
        });

        Log.d(LOG_TAG, "Reached end of onCreate");
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.action_settings: {
                // TODO: Rebuild settings menu...
                Toast toast = Toast.makeText(this, "You selected Settings", Toast.LENGTH_LONG);
                toast.show();
                Log.d(LOG_TAG, "Settings menu selected");
                break;
            }
            // case blocks for other MenuItems (if any)
        }
        return super.onOptionsItemSelected(item);
    }
}

-在gradle.properties中：

android.useAndroidX = true
android.enableJetifier = true

3 个答案:

答案 0 :(得分：0)

  

默认FirebaseApp在此过程中未初始化   console。确保致电   首先com.iainism.joebot。

FirebaseApp.initializeApp(Context)

classpath 'com.google.gms:google-services:4.0.0' //4.1.0 Crashes app on start 也已启用。我没看到但是，您可以尝试禁用它，然后使用google服务（最新版本）进行检查：

Multidex

然后致电：

classpath 'com.google.gms:google-services:4.1.0'

然后在FirebaseApp.initializeApp(MainActivity.this) 方法内声明DocumentReference。

答案 1 :(得分：0)

它显示为：

  

默认FirebaseApp在此过程com.iainism.joebot中未初始化。

     

请务必先致电FirebaseApp.initializeApp(Context)。

设置private DocumentReference mDocRef = null; ...以遵循上述说明：

FirebaseApp.initializeApp(this.getContext());
this.mDocRef = FirebaseFirestore.getInstance().document("FirstGo/Test");

否则，您将在初始化FirebaseFirestore之前访问FirebaseApp。

答案 2 :(得分：0)

即使我通过全新更新的Android Studio 3.2安装遇到此问题，似乎Google也在准备新版本的Android SDK Build-Tools。找到并在今天早上应用此更新后，使用com.google.gms:google-services:4.1.0时不再存在运行时错误（没有其他更改）。

故事的寓意：尽快放弃并在第二天回来，看看在解决问题的工具中是否有通宵修补的东西！

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