【Android模型视图控制器实现给出错误】蹉跎莫遣韶光老,人生唯有读书好。这篇文章主要讲述Android模型视图控制器实现给出错误相关的知识,希望能为你提供帮助。
我有一个项目正在进行中,一切都是正确的,因为我在android studio中使用一个Activity(登录活动)创建项目。后来因为我想在项目上实现MVC,我创建了另外三个包(app,activity)在原始软件包com.otemainc.smartmenu中,然后我将LoginActivity.java文件移动到了活动包中。然后将R类导入其中,将打包的声明行更改为正确的,但当我在手机上运行时,它会给我以下错误
12-16 13:07:27.352 4608-4608/com.otemainc.smartmenu E/AndroidRuntime: FATAL EXCEPTION: mainProcess: com.otemainc.smartmenu, PID: 4608
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.otemainc.smartmenu/com.otemainc.smartmenu.LoginActivity}: java.lang.ClassNotFoundException: Didn't find class "com.otemainc.smartmenu.LoginActivity" on path: DexPathList[[zip file "/data/app/com.otemainc.smartmenu-1/base.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_dependencies_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_0_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_1_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_2_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_3_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_4_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_5_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_6_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_7_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_8_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2426)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2595)
at android.app.ActivityThread.access$800(ActivityThread.java:178)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1470)
at android.os.Handler.dispatchMessage(Handler.java:111)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5631)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:959)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:754)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.otemainc.smartmenu.LoginActivity" on path: DexPathList[[zip file "/data/app/com.otemainc.smartmenu-1/base.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_dependencies_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_0_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_1_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_2_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_3_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_4_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_5_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_6_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_7_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_8_apk.apk", zip file "/data/app/com.otemainc.smartmenu-1/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/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:1071)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2595)
at android.app.ActivityThread.access$800(ActivityThread.java:178)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1470)
at android.os.Handler.dispatchMessage(Handler.java:111)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5631)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:959)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:754)
Suppressed: java.lang.ClassNotFoundException: com.otemainc.smartmenu.LoginActivity
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)
... 13 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader;
no stack available
答案此错误是因为未找到您的活动类,因为您将其移动到另一个文件夹,您需要更改清单文件中的活动名称。你会看起来像这样
<
activity
android:name=".LoginActivity"
android:label="@string/app_name">
<
intent-filter>
<
action android:name="android.intent.action.MAIN" />
<
category android:name="android.intent.category.LAUNCHER" />
<
/intent-filter>
<
/activity>
这意味着正在原始根包中查找活动文件。您需要将名称变为activity.LoginActivity。代码看起来像这样
<
activity
android:name=".activity.LoginActivity"
android:label="@string/app_name">
<
intent-filter>
<
action android:name="android.intent.action.MAIN" />
<
category android:name="android.intent.category.LAUNCHER" />
<
/intent-filter>
<
/activity>
推荐阅读
- 刷新/重新加载Angular 2 Web App
- 如何使用JAVA在Android中拆分ArrayList()
- Android arrayList检索数据
- Android排序自定义对象数组
- 在Android中的SharedPreferences中存储数组的最有效方法是什么()
- 如何在Electron Framework中实现本机上下文菜单(带有检查元素)
- 如何在Electron Framework中实现类似选项卡的浏览器
- 如何使用Electron下载网络文件,保存并显示下载进度
- 如何在Kali Linux中安装Node.js