如何启用Firebase崩溃报告-Android

Question

try {
    throw new NullPointerException();
} catch (NullPointerException ex) {
    FirebaseCrash.logcat(Log.ERROR, TAG, "NPE caught");
    FirebaseCrash.report(ex);
}

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

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.0'

        // Firebase - Google Services 3.0.0
        classpath 'com.google.gms:google-services:3.0.0'

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

allprojects {
    repositories {
        jcenter()
    }
}

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

apply plugin: 'com.android.application'

android {
    compileSdkVersion 'android-N'
    buildToolsVersion '24.0.0-rc2'

    defaultConfig {
        applicationId "com.app.test"
        minSdkVersion 19
        targetSdkVersion 'N'
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            useProguard true
        }
    }
}

dependencies {
    compile 'com.android.support:support-v4:24.0.0-alpha1'
    compile 'com.android.support:appcompat-v7:24.0.0-alpha1'
    compile 'com.android.support:design:24.0.0-alpha1'
    compile 'com.google.firebase:firebase-core:9.0.0'
    compile 'com.google.firebase:firebase-analytics:9.0.0'
    compile 'com.google.firebase:firebase-crash:9.0.0'
    compile 'com.google.firebase:firebase-messaging:9.0.0'
    compile 'com.google.firebase:firebase-config:9.0.0'
    compile 'com.google.firebase:firebase-invites:9.0.0'
    compile 'com.google.android.gms:play-services-appindexing:9.0.0'
}

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

mFirebaseAnalytics = FirebaseAnalytics.getInstance(this);
FirebaseMessaging.getInstance().subscribeToTopic("news");
Log.d(TAG, "Subscribed to news topic");

注意：我已经添加了所有的依赖项，包括崩溃和核心依赖项，还有插件和类路径

提前谢谢你。