Flutter /我的应用无法加载到仿真器或真实设备？

问题描述

我想使用Firebase，我更改了build.gradle文档，然后当我尝试运行Flutter应用程序时，我在调试控制台中看到了此命令。

<script src="https://cdnjs.cloudflare.com/ajax/libs/ramda/0.27.1/ramda.min.js"></script>

android / app / build.gradle：

  Launching lib\main.dart on Google Pixel in debug mode...
    √ Built build\app\outputs\Flutter-apk\app-debug.apk.
    Exited (1)

android / build.gradle：

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def FlutterRoot = localProperties.getProperty('Flutter.sdk')
if (FlutterRoot == null) {
    throw new FileNotFoundException("Flutter SDK not found. Define location with Flutter.sdk in the local.properties file.")
}

def FlutterVersionCode = localProperties.getProperty('Flutter.versionCode')
if (FlutterVersionCode == null) {
    FlutterVersionCode = '1'
}

def FlutterVersionName = localProperties.getProperty('Flutter.versionName')
if (FlutterVersionName == null) {
    FlutterVersionName = '1.0'
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$FlutterRoot/packages/Flutter_tools/gradle/Flutter.gradle"

android {
    compileSdkVersion 29

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        // Todo: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.connect_play"
        minSdkVersion 23
        targetSdkVersion 29
        versionCode FlutterVersionCode.toInteger()
        versionName FlutterVersionName
        testInstrumentationRunner "androidx.test.runner.AndroidJunitRunner"
        multiDexEnabled true
    }

    buildTypes {
        release {
            // Todo: Add your own signing config for the release build.
            // Signing with the debug keys for Now,so `Flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }
}

Flutter {
    source '../..'
}

dependencies {

    implementation 'com.google.firebase:firebase-analytics:17.4.4'
    androidTestImplementation 'androidx.test:runner:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
    testImplementation 'junit:junit:4.12'
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
}
apply plugin: 'com.google.gms.google-services'

我看到此“ connectplay_app已停止，然后此选择显示为” repeat”。我单击“ repeat”按钮，但没有任何改变。我继续等待在模拟器或设备上加载应用程序。为什么会这样？请帮助我，向我点亮。谢谢您的评论，对不起我的错误。

解决方法

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