我不确定它是IDE问题还是我的编码问题。这个应用程序几乎与我在网上关注的应用程序相同，但我的应用程序一直在崩溃。链接到源代码：https://github.com/Gusri/AgeValidated。我的代码几乎与此相同。

XML

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

tools:context="min.com.nyp.sit.myapplication.MainActivity">

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Your name" />

android:id="@+id/editTextName"

android:layout_width="match_parent"

android:layout_height="wrap_content" />

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Age" />

android:id="@+id/editTextAge"

android:layout_width="match_parent"

android:layout_height="wrap_content" />

android:id="@+id/buttonEnter"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Validate"/>

Kotlin代码

package min.com.nyp.sit.myapplication

import android.support.v7.app.AppCompatActivity

import android.os.Bundle

import android.view.View

import kotlinx.android.synthetic.main.activity_main.*

import org.jetbrains.anko.toast

class MainActivity : AppCompatActivity() {

override fun onCreate(savedInstanceState: Bundle?) {

super.onCreate(savedInstanceState)

setContentView(R.layout.activity_main)

buttonEnter.setOnClickListener({

val age:String = editTextAge.toString()

val Name:String = editTextName.toString()

if (age.toInt() <= 18){

toast("Sorry $Name your Age not Register")

}

else{

toast("Thank you $Name for Register")

}

})

}

}

Gradle测试

buildscript {

ext.kotlin_version = '1.1.3-2'

ext.anko_version = '0.10.2'

repositories {

google()

jcenter()

}

dependencies {

classpath 'com.android.tools.build:gradle:3.1.0-alpha03'

classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

// NOTE: Do not place your application dependencies here; they belong

// in the individual module build.gradle files

}

}

allprojects {

repositories {

google()

jcenter()

}

}

task clean(type: Delete) {

delete rootProject.buildDir

}

Gradle App

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

android {

compileSdkVersion 26

buildToolsVersion "26.0.2"

defaultConfig {

applicationId "min.com.nyp.sit.myapplication"

minSdkVersion 26

targetSdkVersion 26

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 'com.android.support:appcompat-v7:26.1.0'

implementation 'com.android.support.constraint:constraint-layout:1.0.2'

testImplementation 'junit:junit:4.12'

androidTestImplementation('com.android.support.test.espresso:espresso-

core:3.0.1', {

exclude group: 'com.android.support', module: 'support-annotations'

})

implementation"org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"

compile "org.jetbrains.anko:anko-commons:0.10.2"

}

最后但并非最不重要的是我使用anko进行吐司显示。因此修改了两个gradle脚本。

这是我的堆栈跟踪：

11-11 23:14:33.319 4580-4580/min.com.nyp.sit.myapplication E/AndroidRuntime: FATAL EXCEPTION: main

Process: min.com.nyp.sit.myapplication, PID: 4580

java.lang.NumberFormatException: For input string: "android.support.v7.widget.AppCompatEditText{151ba00 VFED..CL. .F...... 0,290-1440,448 #7f070030 app:id/editTextAge}"

at java.lang.Integer.parseInt(Integer.java:608)

at java.lang.Integer.parseInt(Integer.java:643)

at min.com.nyp.sit.myapplication.MainActivity$onCreate$1.onClick(MainActivity.kt:20)

at android.view.View.performClick(View.java:6294)

at android.view.View$PerformClick.run(View.java:24770)

at android.os.Handler.handleCallback(Handler.java:790)

at android.os.Handler.dispatchMessage(Handler.java:99)

at android.os.Looper.loop(Looper.java:164)

at android.app.ActivityThread.main(ActivityThread.java:6494)

at java.lang.reflect.Method.invoke(Native Method)

at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)