FLUTTER ERROR: java.lang.RuntimeException: Unable to instantiate application
4,325
perhaps the issue is because flutter can't access your App on launch due to flutter/dart configuration in your project structure. Maybe you can try default Flutter Application name in your AndroidManifest.xml. See image below.
<application android:name="io.flutter.app.FlutterApplication" android:label="AppLabel">
Author by
Ace
Updated on December 18, 2022Comments
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Ace over 1 year
I am new to this bare with me.
I am running my code in VS
I am trying to RUN my FLUTTER app and i keep getting error:
Launching lib\main.dart on TECNO LC6 in debug mode... ✓ Built build\app\outputs\flutter-apk\app-debug.apk. E/AndroidRuntime(32535): FATAL EXCEPTION: main E/AndroidRuntime(32535): Process: com.oneclick.errands, PID: 32535 E/AndroidRuntime(32535): java.lang.RuntimeException: Unable to instantiate application com.oneclick.errands.Application: java.lang.ClassNotFoundException: Didn't find class "com.oneclick.errands.Application" on path: DexPathList[[zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/data/app/com.oneclick.errands-9wup51WXGNuAJqp8P2doyw==/base.apk"],nativeLibraryDirectories=[/data/app/com.oneclick.errands-9wup51WXGNuAJqp8P2doyw==/lib/arm, /data/app/com.oneclick.errands-9wup51WXGNuAJqp8P2doyw==/base.apk!/lib/armeabi-v7a, /system/lib]] E/AndroidRuntime(32535): at android.app.LoadedApk.makeApplication(LoadedApk.java:1069) E/AndroidRuntime(32535): at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5923) E/AndroidRuntime(32535): at android.app.ActivityThread.access$1200(ActivityThread.java:213) E/AndroidRuntime(32535): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1685) E/AndroidRuntime(32535): at android.os.Handler.dispatchMessage(Handler.java:106) E/AndroidRuntime(32535): at android.os.Looper.loop(Looper.java:193) E/AndroidRuntime(32535): at android.app.ActivityThread.main(ActivityThread.java:6758) E/AndroidRuntime(32535): at java.lang.reflect.Method.invoke(Native Method) E/AndroidRuntime(32535): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:497) E/AndroidRuntime(32535): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:912) E/AndroidRuntime(32535): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.oneclick.errands.Application" on path: DexPathList[[zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/data/app/com.oneclick.errands-9wup51WXGNuAJqp8P2doyw==/base.apk"],nativeLibraryDirectories=[/data/app/com.oneclick.errands-9wup51WXGNuAJqp8P2doyw==/lib/arm, /data/app/com.oneclick.errands-9wup51WXGNuAJqp8P2doyw==/base.apk!/lib/armeabi-v7a, /system/lib]] E/AndroidRuntime(32535): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134) E/AndroidRuntime(32535): at java.lang.ClassLoader.loadClass(ClassLoader.java:379) E/AndroidRuntime(32535): at java.lang.ClassLoader.loadClass(ClassLoader.java:312) E/AndroidRuntime(32535): at android.app.AppComponentFactory.instantiateApplication(AppComponentFactory.java:50) E/AndroidRuntime(32535): at androidx.core.app.CoreComponentFactory.instantiateApplication(CoreComponentFactory.java:52) E/AndroidRuntime(32535): at android.app.Instrumentation.newApplication(Instrumentation.java:1120) E/AndroidRuntime(32535): at android.app.LoadedApk.makeApplication(LoadedApk.java:1061) E/AndroidRuntime(32535): ... 9 more
Then it hangs on the last step. I even left it for 3 hours n got impatient. I have tried to add as much relevant information as I cam but the system wants me to add more info but i have said i have to say. Now i am just typing to get rid of this warning.
!!!HELP!!!
My 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 GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.") } def flutterVersionCode = localProperties.getProperty('flutter.versionCode') if (flutterVersionCode == null) { flutterVersionCode = '2' } def flutterVersionName = localProperties.getProperty('flutter.versionName') if (flutterVersionName == null) { flutterVersionName = '3.15.0' } apply plugin: 'com.android.application' apply plugin: 'kotlin-android' apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle" def keystorePropertiesFile = rootProject.file("key.properties") def keystoreProperties = new Properties() keystoreProperties.load(new FileInputStream(keystorePropertiesFile)) 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.oneclick.errands" minSdkVersion 19 targetSdkVersion 29 versionCode flutterVersionCode.toInteger() versionName flutterVersionName testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" //Added to fix error <FirebaseCorePlugin.java uses unchecked or unsafe operations> multiDexEnabled true } signingConfigs { release { keyAlias keystoreProperties['keyAlias'] keyPassword keystoreProperties['keyPassword'] storeFile file(keystoreProperties['storeFile']) storePassword keystoreProperties['storePassword'] } } 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 signingConfig signingConfigs.release } } } flutter { source '../..' } dependencies { implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" implementation 'com.google.firebase:firebase-messaging:20.1.3' implementation 'androidx.annotation:annotation:1.1.0' implementation 'androidx.localbroadcastmanager:localbroadcastmanager:1.0.0' testImplementation 'junit:junit:4.12' androidTestImplementation 'androidx.test:runner:1.1.1' androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1' //Added to fix error <FirebaseCorePlugin.java uses unchecked or unsafe operations> implementation 'com.android.support:multidex:1.0.3' } apply plugin: 'com.google.gms.google-services'
Thank you for your time.
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Jay over 3 yearsinstead of image, consider including code snippets (along with image if you are illustrating something).
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Ace over 3 years@HarleyRegua Yeah that was the issue. Thanks. Resolved it
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Daniel Sogbey about 2 yearsGreat this answer helped me too
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AnT about 2 yearsActually,
android:name
should be updated toandroid:name="${applicationName}"
according to the official guidelines.