JavaWeb的login三种版本

KotlinMessager/.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches/build_file_checksums.ser
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild

KotlinMessager/app/.gitignore

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+/build

KotlinMessager/app/build.gradle

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+apply plugin: 'com.android.application'
+
+apply plugin: 'kotlin-android'
+
+apply plugin: 'kotlin-android-extensions'
+
+android {
+    compileSdkVersion 28
+    defaultConfig {
+        applicationId "com.example.acer.myapplication"
+        minSdkVersion 15
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation 'com.android.support:appcompat-v7:28.0.0'
+    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'com.android.support.test:runner:1.0.2'
+    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+
+    implementation 'com.google.firebase:firebase-core:16.0.1'
+    implementation 'com.google.firebase:firebase-auth:16.0.2'
+}
+apply plugin: 'com.google.gms.google-services'

KotlinMessager/app/google-services.json

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+{
+  "project_info": {
+    "project_number": "53242552378",
+    "firebase_url": "https://kotlinmessager-bd8c4.firebaseio.com",
+    "project_id": "kotlinmessager-bd8c4",
+    "storage_bucket": "kotlinmessager-bd8c4.appspot.com"
+  },
+  "client": [
+    {
+      "client_info": {
+        "mobilesdk_app_id": "1:53242552378:android:f50c2ad6ed242e21",
+        "android_client_info": {
+          "package_name": "com.example.acer.myapplication"
+        }
+      },
+      "oauth_client": [
+        {
+          "client_id": "53242552378-kvai3d9v7ead6ohqddsg88dvrt3es374.apps.googleusercontent.com",
+          "client_type": 3
+        }
+      ],
+      "api_key": [
+        {
+          "current_key": "AIzaSyBLr9j9ndNUYt3-DUT8yKpwnJTXAezrxCo"
+        }
+      ],
+      "services": {
+        "analytics_service": {
+          "status": 1
+        },
+        "appinvite_service": {
+          "status": 1,
+          "other_platform_oauth_client": []
+        },
+        "ads_service": {
+          "status": 2
+        }
+      }
+    }
+  ],
+  "configuration_version": "1"
+}

KotlinMessager/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

KotlinMessager/app/src/androidTest/java/com/example/acer/myapplication/ExampleInstrumentedTest.kt

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+package com.example.acer.myapplication
+
+import android.support.test.InstrumentationRegistry
+import android.support.test.runner.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getTargetContext()
+        assertEquals("com.example.acer.myapplication", appContext.packageName)
+    }
+}

KotlinMessager/app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.example.acer.myapplication">
+
+    <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=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+        <activity android:name=".LoginActivity">
+
+        </activity>
+    </application>
+
+</manifest>

KotlinMessager/app/src/main/java/com/example/acer/myapplication/LoginActivity.kt

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+package com.example.acer.myapplication
+
+import android.support.v7.app.AppCompatActivity
+import android.os.Bundle
+import android.util.Log
+import com.google.firebase.auth.FirebaseAuth
+import kotlinx.android.synthetic.main.activity_login.*
+import kotlinx.android.synthetic.main.activity_main.*
+
+class LoginActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_login)
+
+        login_button_login.setOnClickListener(){
+            val email = email_edittext_login.text.toString()
+            val password = password_edittext_login.text.toString()
+            Log.d("Login","Attempt login with email/pw:$email/$password")
+
+            FirebaseAuth.getInstance().signInWithEmailAndPassword(email,password)
+
+        }
+
+        back_to_register_button_login.setOnClickListener(){
+            finish()
+        }
+
+    }
+}

KotlinMessager/app/src/main/java/com/example/acer/myapplication/MainActivity.kt

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+package com.example.acer.myapplication
+
+import android.content.Intent
+import android.support.v7.app.AppCompatActivity
+import android.os.Bundle
+
+import android.util.Log
+import android.widget.Toast
+import com.google.firebase.auth.FirebaseAuth
+import kotlinx.android.synthetic.main.activity_main.*
+
+class MainActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+
+        register_button_register.setOnClickListener(){
+            performRegister()
+        }
+        already_have_a_count_textview_register.setOnClickListener(){
+            Log.d("MainActivity","try to show Login activity")
+
+            val intent = Intent(this,LoginActivity::class.java)
+            startActivity(intent)
+        }
+
+    }
+    private fun performRegister(){
+        val email = email_edittext_register.text.toString()
+        val password = password_edittext_register.text.toString()
+
+        if(email.isEmpty() || password.isEmpty()){
+            Toast.makeText(this,"请输入用户名密码",Toast.LENGTH_SHORT).show()
+            return
+        }
+
+        Log.d("MainActivity","Email is:"+email)
+        Log.d("MainActivity","Password is:$password")
+
+        FirebaseAuth.getInstance().createUserWithEmailAndPassword(email,password)
+            .addOnCompleteListener{
+                if (!it.isSuccessful)
+                    return@addOnCompleteListener
+                //else if successful
+                Log.d("Main","成功创建一个用户，该用户的uid是：${it.result.user.uid}")
+            }
+            .addOnFailureListener{
+                Log.d("Main","创建用户失败：${it.message}")
+                Toast.makeText(this,"创建用户失败：${it.message}",Toast.LENGTH_SHORT).show()
+            }
+    }
+}