first code commit

.gitignore

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+*.iml
+.idea/*
+.gradle
+/gradle
+/local.properties
+.DS_Store
+/build
+/captures
+.externalNativeBuild

CONTRIBUTING.md

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+# How to become a contributor and submit your own code
+
+## Contributor License Agreements
+
+We'd love to accept your sample apps and patches! Before we can take them, we
+have to jump a couple of legal hurdles.
+
+Please fill out either the individual or corporate Contributor License Agreement
+(CLA).
+
+  * If you are an individual writing original source code and you're sure you
+    own the intellectual property, then you'll need to sign an [individual CLA]
+    (https://developers.google.com/open-source/cla/individual).
+  * If you work for a company that wants to allow you to contribute your work,
+    then you'll need to sign a [corporate CLA]
+    (https://developers.google.com/open-source/cla/corporate).
+
+Follow either of the two links above to access the appropriate CLA and
+instructions for how to sign and return it. Once we receive it, we'll be able to
+accept your pull requests.
+
+## Contributing A Patch
+
+1. Submit an issue describing your proposed change to the repo in question.
+1. The repo owner will respond to your issue promptly.
+1. If your proposed change is accepted, and you haven't already done so, sign a
+   Contributor License Agreement (see details above).
+1. Fork the desired repo, develop and test your code changes.
+1. Ensure that your code adheres to the existing style in the sample to which
+   you are contributing. Refer to the
+   [Google Cloud Platform Samples Style Guide]
+   (https://github.com/GoogleCloudPlatform/Template/wiki/style.html) for the
+   recommended coding standards for this organization.
+1. Ensure that your code has an appropriate set of unit tests which all pass.
+1. Submit a pull request.

README.md

@@ -1 +1,25 @@
-# android-kotlin-login
+Implementing Login on Android with FirebaseUI
+=========================
+
+This repository contains the final code for the Login Codelab.
+
+License
+-------
+
+Copyright 2019 Google, Inc.
+
+Licensed to the Apache Software Foundation (ASF) under one or more contributor
+license agreements.  See the NOTICE file distributed with this work for
+additional information regarding copyright ownership.  The ASF licenses this
+file to you under the Apache License, Version 2.0 (the "License"); you may not
+use this file except in compliance with the License.  You may obtain a copy of
+the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+License for the specific language governing permissions and limitations under
+the License.
+

app/.gitignore

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+/build

app/build.gradle

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+/*
+ * Copyright 2019, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+
+android {
+    compileSdkVersion 29
+    defaultConfig {
+        applicationId "com.example.android.firebaseui_login_sample"
+        minSdkVersion 19
+        targetSdkVersion 29
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    dataBinding {
+        enabled = true
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'androidx.appcompat:appcompat:1.0.2'
+    implementation 'androidx.activity:activity-ktx:1.1.0-alpha01'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'androidx.core:core-ktx:1.0.2'
+    implementation 'androidx.fragment:fragment-ktx:1.2.0-alpha01'
+    implementation 'androidx.lifecycle:lifecycle-extensions:2.0.0'
+    implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.2.0-alpha02"
+    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0-alpha02'
+    implementation 'androidx.navigation:navigation-fragment-ktx:2.0.0'
+    implementation "androidx.navigation:navigation-ui-ktx:2.0.0"
+    implementation 'androidx.preference:preference-ktx:1.1.0-rc01'
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation 'com.firebaseui:firebase-ui-auth:5.0.0'
+
+    testImplementation 'junit:junit:4.12'
+}
+
+apply plugin: 'com.google.gms.google-services'

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~  Copyright 2019, The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.example.android.firebaseui_login_sample">
+
+    <application
+            android:allowBackup="true"
+            android:icon="@mipmap/ic_launcher"
+            android:label="@string/app_name"
+            android:roundIcon="@mipmap/ic_launcher_round"
+            android:supportsRtl="true"
+            android:theme="@style/AppTheme">
+        <activity android:name="com.example.android.firebaseui_login_sample.MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/example/android/firebaseui_login_sample/FirebaseUserLiveData.kt

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+/*
+ * Copyright 2019, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.android.firebaseui_login_sample
+
+import com.google.firebase.auth.FirebaseUser
+import com.google.firebase.auth.FirebaseAuth
+import androidx.lifecycle.LiveData
+
+/**
+ * This class observes the current FirebaseUser. If there is no logged in user, FirebaseUser will
+ * be null.
+ *
+ * Note that onActive() and onInactive() will get triggered when the configuration changes (for
+ * example when the device is rotated). This may be undesirable or expensive depending on the
+ * nature of your LiveData object, but is okay for this purpose since we are only adding and
+ * removing the authStateListener.
+ */
+class FirebaseUserLiveData : LiveData<FirebaseUser?>() {
+    private val firebaseAuth = FirebaseAuth.getInstance()
+
+    // TODO set the value of this FireUserLiveData object by hooking it up to equal the value of the
+    //  current FirebaseUser. You can utilize the FirebaseAuth.AuthStateListener callback to get
+    //  updates on the current Firebase user logged into the app.
+    private val authStateListener = FirebaseAuth.AuthStateListener { firebaseAuth ->
+        // Use the FirebaseAuth instance instantiated at the beginning of the class to get an entry
+        // point into the Firebase Authentication SDK the app is using.
+        // With an instance of the FirebaseAuth class, you can now query for the current user.
+        value = firebaseAuth.currentUser
+    }
+
+    // When this object has an active observer, start observing the FirebaseAuth state to see if
+    // there is currently a logged in user.
+    override fun onActive() {
+        firebaseAuth.addAuthStateListener(authStateListener)
+    }
+
+    // When this object no longer has an active observer, stop observing the FirebaseAuth state to
+    // prevent memory leaks.
+    override fun onInactive() {
+        firebaseAuth.removeAuthStateListener(authStateListener)
+    }
+}

app/src/main/java/com/example/android/firebaseui_login_sample/LoginFragment.kt

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+/*
+ * Copyright 2019, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.android.firebaseui_login_sample
+
+import android.app.Activity
+import android.content.Intent
+import android.os.Bundle
+import android.util.Log
+import androidx.fragment.app.Fragment
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.lifecycle.Observer
+import androidx.navigation.fragment.findNavController
+import androidx.activity.addCallback
+import androidx.databinding.DataBindingUtil
+import androidx.fragment.app.viewModels
+import androidx.navigation.NavController
+import com.example.android.firebaseui_login_sample.databinding.*
+import com.firebase.ui.auth.AuthUI
+import com.firebase.ui.auth.IdpResponse
+import com.google.android.material.snackbar.Snackbar
+import com.google.firebase.auth.FirebaseAuth
+
+class LoginFragment : Fragment() {
+
+    companion object {
+        const val TAG = "LoginFragment"
+        const val SIGN_IN_RESULT_CODE = 1001
+    }
+
+    // Get a reference to the ViewModel scoped to this Fragment.
+    private val viewModel by viewModels<LoginViewModel>()
+
+    private lateinit var navController: NavController
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?
+    ): View? {
+
+        // Inflate the layout for this fragment.
+        val binding = DataBindingUtil.inflate<FragmentLoginBinding>(
+            inflater, R.layout.fragment_login, container, false
+        )
+
+        binding.authButton.setOnClickListener { launchSignInFlow() }
+
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        navController = findNavController()
+    }
+
+    private fun launchSignInFlow() {
+        // Give users the option to sign in / register with their email or Google account. If users
+        // choose to register with their email, they will need to create a password as well.
+        val providers = arrayListOf(
+            AuthUI.IdpConfig.EmailBuilder().build(), AuthUI.IdpConfig.GoogleBuilder().build()
+        )
+
+        // Create and launch sign-in intent. We listen to the response of this activity with the
+        // SIGN_IN_RESULT_CODE code.
+        startActivityForResult(
+            AuthUI.getInstance().createSignInIntentBuilder().setAvailableProviders(
+                providers
+            ).build(), SIGN_IN_RESULT_CODE
+        )
+    }
+
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        if (requestCode == SIGN_IN_RESULT_CODE) {
+            val response = IdpResponse.fromResultIntent(data)
+            if (resultCode == Activity.RESULT_OK) {
+                // Successfully signed in user.
+                Log.i(
+                    TAG,
+                    "Successfully signed in user " +
+                            "${FirebaseAuth.getInstance().currentUser?.displayName}!"
+                )
+            } else {
+                // Sign in failed. If response is null the user canceled the sign-in flow using
+                // the back button. Otherwise check response.getError().getErrorCode() and handle
+                // the error.
+                Log.i(TAG, "Sign in unsuccessful ${response?.error?.errorCode}")
+            }
+        }
+    }
+}