本文将为您提供关于在空白的Android活动上找不到类错误的详细介绍，我们还将为您解释androiddata空白的相关知识，同时，我们还将为您提供关于AndroidClassNotFoundExcep

本文将为您提供关于在空白的Android活动上找不到类错误的详细介绍，我们还将为您解释android data空白的相关知识，同时，我们还将为您提供关于Android ClassNotFoundException：在路径上找不到类、android studio导入jar包 找不到类、android studio导包找不到类、Android Studio错误：E / dalvikvm：找不到类’android.graphics.drawable.RippleDrawable’的实用信息。

• 在空白的Android活动上找不到类错误（android data空白）
• Android ClassNotFoundException：在路径上找不到类
• android studio导入jar包 找不到类
• android studio导包找不到类
• Android Studio错误：E / dalvikvm：找不到类’android.graphics.drawable.RippleDrawable’

在空白的Android活动上找不到类错误（android data空白）

当我在Android Studio 2.0中创建空白活动并尝试在API 16上运行该活动时，它将正确编译。当我在具有API
23的仿真器上运行它时，它运行无误。当我在API 16上运行它时，在应用启动时会给我很多错误。见下文。奇怪的是该应用程序运行正常。

这可能是什么原因？

在Android Studio中，我无效并清除了缓存。还清理了项目并对其进行了重建。

供参考的代码：

AndroidManifest.xml

    <?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="nl.myapp.test">    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:supportsRtl="true"        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>

MainActivity.Java

package nl.myapp.test;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="nl.myapp.test.MainActivity">    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Hello World!" /></RelativeLayout>

Gradle 2.0.0构建文件build.gradle（Module App）

apply plugin: ''com.android.application''android {    compileSdkVersion 23    buildToolsVersion "23.0.3"    defaultConfig {        applicationId "nl.myapp.test"        minSdkVersion 16        targetSdkVersion 23        versionCode 1        versionName "1.0"    }    buildTypes {        release {            minifyEnabled false            proguardFiles getDefaultProguardFile(''proguard-android.txt''), ''proguard-rules.pro''        }    }}dependencies {    compile fileTree(dir: ''libs'', include: [''*.jar''])    testCompile ''junit:junit:4.12''    compile ''com.android.support:appcompat-v7:23.3.0''}

应用在API 16上启动时的logcat错误

04-10 18:29:29.945 23899-23899/nl.myapp.test E/dalvikvm: Could not find class ''android.app.ActivityManager$TaskDescription'', referenced from method nl.myapp.test.MainActivity.access$super04-10 18:29:29.945 23899-23899/nl.myapp.test E/dalvikvm: Could not find class ''android.os.UserHandle'', referenced from method nl.myapp.test.MainActivity.access$super04-10 18:29:29.945 23899-23899/nl.myapp.test E/dalvikvm: Could not find class ''android.os.UserHandle'', referenced from method nl.myapp.test.MainActivity.access$super04-10 18:29:29.945 23899-23899/nl.myapp.test E/dalvikvm: Could not find class ''android.app.SharedElementCallback'', referenced from method nl.myapp.test.MainActivity.access$super04-10 18:29:29.945 23899-23899/nl.myapp.test E/dalvikvm: Could not find class ''android.os.PersistableBundle'', referenced from method nl.myapp.test.MainActivity.access$super04-10 18:29:29.945 23899-23899/nl.myapp.test E/dalvikvm: Could not find class ''android.transition.TransitionManager'', referenced from method nl.myapp.test.MainActivity.access$super04-10 18:29:29.945 23899-23899/nl.myapp.test E/dalvikvm: Could not find class ''android.app.SharedElementCallback'', referenced from method nl.myapp.test.MainActivity.access$super04-10 18:29:29.945 23899-23899/nl.myapp.test E/dalvikvm: Could not find class ''android.os.UserHandle'', referenced from method nl.myapp.test.MainActivity.access$super04-10 18:29:29.945 23899-23899/nl.myapp.test E/dalvikvm: Could not find class ''android.os.UserHandle'', referenced from method nl.myapp.test.MainActivity.access$super04-10 18:29:29.945 23899-23899/nl.myapp.test E/dalvikvm: Could not find class ''android.app.assist.AssistContent'', referenced from method nl.myapp.test.MainActivity.access$super04-10 18:29:29.945 23899-23899/nl.myapp.test E/dalvikvm: Could not find class ''android.view.SearchEvent'', referenced from method nl.myapp.test.MainActivity.access$super04-10 18:29:29.945 23899-23899/nl.myapp.test E/dalvikvm: Could not find class ''android.os.UserHandle'', referenced from method nl.myapp.test.MainActivity.access$super04-10 18:29:29.945 23899-23899/nl.myapp.test E/dalvikvm: Could not find class ''android.os.PersistableBundle'', referenced from method nl.myapp.test.MainActivity.access$super

答案1

在Android Studio中，我去了 File- > Project Structure-> Project。

首先，我将Gradle升级到 2.11 ，将Android插件版本升级到 2.0.0
。接下来，我同步了项目并对其进行了编译。错误仍然存​​在。

之后，我将Android插件版本降级为 1.5.0 。

现在，当我编译并运行项目时，错误消失了。

Android ClassNotFoundException：在路径上找不到类

10-22 15:29:40.897: E/AndroidRuntime(2561): FATAL EXCEPTION: main10-22 15:29:40.897: E/AndroidRuntime(2561): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.gvg.simid/com.gvg.simid.Login}: java.lang.ClassNotFoundException: Didn''t find class "com.gvg.simid.Login" on path: DexPathList[[zip file "/data/app/com.gvg.simid-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.gvg.simid-1, /vendor/lib, /system/lib]]10-22 15:29:40.897: E/AndroidRuntime(2561):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2137)10-22 15:29:40.897: E/AndroidRuntime(2561):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)10-22 15:29:40.897: E/AndroidRuntime(2561):     at android.app.ActivityThread.access$600(ActivityThread.java:141)10-22 15:29:40.897: E/AndroidRuntime(2561):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)10-22 15:29:40.897: E/AndroidRuntime(2561):     at android.os.Handler.dispatchMessage(Handler.java:99)10-22 15:29:40.897: E/AndroidRuntime(2561):     at android.os.Looper.loop(Looper.java:137)10-22 15:29:40.897: E/AndroidRuntime(2561):     at android.app.ActivityThread.main(ActivityThread.java:5103)10-22 15:29:40.897: E/AndroidRuntime(2561):     at java.lang.reflect.Method.invokeNative(Native Method)10-22 15:29:40.897: E/AndroidRuntime(2561):     at java.lang.reflect.Method.invoke(Method.java:525)10-22 15:29:40.897: E/AndroidRuntime(2561):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)10-22 15:29:40.897: E/AndroidRuntime(2561):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)10-22 15:29:40.897: E/AndroidRuntime(2561):     at dalvik.system.NativeStart.main(Native Method)10-22 15:29:40.897: E/AndroidRuntime(2561): Caused by: java.lang.ClassNotFoundException: Didn''t find class "com.gvg.simid.Login" on path: DexPathList[[zip file "/data/app/com.gvg.simid-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.gvg.simid-1, /vendor/lib, /system/lib]]10-22 15:29:40.897: E/AndroidRuntime(2561):     at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:53)10-22 15:29:40.897: E/AndroidRuntime(2561):     at java.lang.ClassLoader.loadClass(ClassLoader.java:501)10-22 15:29:40.897: E/AndroidRuntime(2561):     at java.lang.ClassLoader.loadClass(ClassLoader.java:461)10-22 15:29:40.897: E/AndroidRuntime(2561):     at android.app.Instrumentation.newActivity(Instrumentation.java:1061)10-22 15:29:40.897: E/AndroidRuntime(2561):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2128)10-22 15:29:40.897: E/AndroidRuntime(2561):     ... 11 more

我不太确定是什么原因导致的，因为清单中正确列出了它：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.gvg.simid"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="18" />    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />    <uses-permission android:name="android.permission.BLUETOOTH" />    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />    <uses-permission android:name="android.permission.CAMERA"/>    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>    <uses-permission android:name="android.permission.INTERNET" />    <uses-permission android:name="android.permission.READ_LOGS" />    <uses-permission android:name="android.permission.READ_OWNER_DATA" />    <uses-permission android:name="android.permission.READ_PHONE_STATE" />    <uses-permission android:name="android.permission.RECORD_AUDIO"/>    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />    <uses-permission android:name="android.permission.WRITE_OWNER_DATA" />    <uses-permission android:name="android.permission.WRITE_SETTINGS" />    <uses-permission android:name="android.permission.WAKE_LOCK" />    <uses-feature android:name="android.hardware.usb.host" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name="com.gvg.simid.Login"            android:label="@string/app_name"             android:screenOrientation="landscape">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>

我还添加了“ Android Private Libraries”来构建路径，并将其移至“ Order and Export”的顶部，但是它仍然给我同样的错误。

编辑：我完全重建了该项目，并且无法重现该错误。不知道是什么原因造成的。

答案1

我的项目有同样的问题。这是由于我的项目与我在项目中添加的库项目之间的android支持库版本冲突而发生的。将相同版本的android支持库放入您的项目和包含的库项目中，并清理构建 …一切正常。

android studio导入jar包 找不到类

小生用android studio导入了一个第三方jar包，导入后用安卓5.0以下的机子会发生找不到类的异常(找不到的类不是导入的jar的类，而是另外一个开源框架的类)，5.0及以上的就不会有这个问题，求引发该异常的原因和解决方案 

急急急急急~!!~~!~

android studio导包找不到类

Android Studio错误：E / dalvikvm：找不到类’android.graphics.drawable.RippleDrawable’

E/dalvikvm: Could not find class ''android.graphics.drawable.rippledrawable'',referenced from method android.support.v7.widget.AppCompatimageHelper.hasOverlappingRendering

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