Question

我得到了相似的帖子，但没有任何工作我有android studio 2.3.1
gradle版本2.3.1
程序兼容性-V7：25.3.1

我通过android studio创建一个新项目（一个由Android Studio（Hello Word）自动创建的项目）。我没有写任何东西。

当我通过android studio使用usb安装应用程序时，它运行得很好但同样的应用程序，如果我从它的图标打开它，我有这些错误

还有一个我注意到apk的大小是500-600kb，早期它曾经用于hello world（默认为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:511)
                                                                         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

我的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>

我的主要活动

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}}

我的清单

<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>

的gradle（模块：APP）

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这个（项目）

// 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
}

Answer 1

得到了解决方案，因为即时运行正在发生，只是禁用它

转到：

Android Studio --> File --> Setting --> Build, execution, deploy -->  Instant run.

Answer 2

无需禁用即时运行，只需从设备/模拟器中删除应用程序并清理项目并重新安装即可。

Answer 3

对我来说，问题是 Gradle 依赖关系不匹配。以下是为我解决的问题：

apply plugin: 'com.android.application'

android {
compileSdkVersion 26
buildToolsVersion "26.0.0"
defaultConfig {
    applicationId "com.and.myApp"
    minSdkVersion 19
    targetSdkVersion 26
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    externalNativeBuild {
        cmake {
            cppFlags "-fexceptions"
        }
    }
}


dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'jp.wasabeef:blurry:2.1.1'
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
    exclude group: 'com.android.support', module: 'support-annotations'
})

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


//noinspection GradleCompatible
compile 'com.android.support:cardview-v7:25.3.1'

compile 'com.android.support:appcompat-v7:26.+'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
compile 'com.android.support:design:26.+'

}

Answer 4

对我来说，在我添加代码以使用getFusedLocationProviderClient之后，我会崩溃

process: no.onmyway133.myapp, PID: 10538
    java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/common/api/Api$zzf;
        at com.google.android.gms.location.LocationServices.<clinit>(Unknown Source)
        at com.google.android.gms.location.LocationServices.getFusedLocationProviderClient(Unknown Source)
        at no.onmyway133.myapp.maps.MapsActivity.onCreate(MapsActivity.kt:22)

问题是build.gradle中的警告，它警告两者都应该使用相同的版本，否则将有可能发生运行时崩溃。

所以修复是指定相同的版本

implementation 'com.google.android.gms:play-services-maps:15.0.1'
implementation "com.google.android.gms:play-services-location:15.0.1"

使用引导类加载器找不到类;没有堆栈跟踪可用

4 个答案: