I have a simmilar post, but nothing works for me Android studio 2.3.1
gradle version 2.3.1
AppCompat-v7: 25.3.1
I am creating a new project by Android Studio (the one that is automatically created by Android Studio (Hello Word)). I do not write anything in it.
When I install the application using usb via android studio, it works fine but the same application, if I open it from it, I got these errors
Another I noticed that the apk size is 500-600 kb, before it was around for the hi world (default for android studio) Apk 2.3Mb
FATAL EXCEPTION: main Process: in.codebucket.check, PID: 32397 java.lang.RuntimeException: Unable to instantiate activity ComponentInfo {in.codebucket.check / in.codebucket.check.MainActivity}: java.lang.ClassNotFoundException: Didn ' t find class "in.codebucket.check.MainActivity" on path: DexPathList [[zip file "/data/app/in.codebucket.check-1/base.apk"†,nativeLibraryDirectories=[/data/app/in. codebucket.check-1 / lib / x86, / vendor / lib, / system / lib]] at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:2327) at android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:2476 ) at android.app.ActivityThread.-wrap11 (ActivityThread.java) at android.app.ActivityThread $ H.handleMessage (ActivityThread.java:1344) at android.os.Handler.dispatchMessage (Handler.java:102) at android. os.Looper.loop (Looper.java:148) at android.app.ActivityThread.main (ActivityThread.java:5417) at java.lang.reflect.Method.invoke (Native Method) at com.android.internal.os. ZygoteInit $ MethodAndArgsCaller .run (ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:616) Caused by: java.lang.ClassNotFoundException: Didn't find class "in.codebucket.check.MainActivity "on path: DexPathList [[zip file" /data/app/in.codebucket.check-1/base.apk"†,nativeLibraryDirectories=[/data/app/in.codebucket.check-1/lib/x86, / vendor / lib, / system / lib]] at dalvik.system.BaseDexClassLoader.findClass (BaseDexClassLoader.java:56) at java.lang.ClassLoader.loadClass (ClassLoader.java∗11) at java.lang.ClassLoader.loadClass (ClassLoader .java: 469) at android.app.Instrumentation.newActivity (Instrumentation.java:1067) at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:2317) at android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:2476) at android.app.ActivityThread.-wrap11 (ActivityThread.java) at android.app.ActivityThread $ H.handleMessage (ActivityThread.java:1344) at android.os.Handler.dispatchMessage (Handler.java:102) at android.os .Looper.loop (Looper.java:148) at android.app.ActivityThread.main (ActivityThread.java:5417) at java.lang.reflect.Method.invoke (Native Method) at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run (ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:616) Suppressed: java.lang.ClassNotFoundException: in.codebucket.check.MainActivity at java.lang.Class.classForName (Native Method) at java.lang .BootClassLoader.findClass (ClassLoader.java:781) at java.lang.BootClassLoader.loadClass (ClassLoader.java:841) at java.lang.ClassLoader.loadClass (ClassLoader.java:504) ... 12 more Caused by: java .lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available My xml
<?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" 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" tools:context="in.codebucket.check.MainActivity"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello World!" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" /> </android.support.constraint.ConstraintLayout>
My mainactivity
public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); }}
my manifest
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="in.codebucket.check"> <application android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" 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> </application> </manifest>
gradle (Module: application)
apply plugin: 'com.android.application' android { compileSdkVersion 25 buildToolsVersion "25.0.2" defaultConfig { applicationId "in.codebucket.check" minSdkVersion 16 targetSdkVersion 25 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' }}} dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) androidTestCompile('com.android.support.test.espresso:espresso- core:2.2.2', { exclude group: 'com.android.support', module: 'support-annotations' }) compile 'com.android.support:appcompat-v7:25.3.1' compile 'com.android.support.constraint:constraint-layout:1.0.2' testCompile 'junit:junit:4.12' }
gradle (project)
// Top-level build file where you can add configuration options common to all sub-projects/modules. buildscript { repositories { jcenter() } dependencies { classpath 'com.android.tools.build:gradle:2.3.1' // NOTE: Do not place your application dependencies here; they belong // in the individual module build.gradle files } } allprojects { repositories { jcenter() } } task clean(type: Delete) { delete rootProject.buildDir }