我试图在Android 18的旧设备上运行一个Android项目 . 该项目在Android> 21上工作正常,但在Android 18上我收到以下错误:
03-11 01:22:31.147 2343-2608 /? E /看门狗:!@Sync 466 03-11 01:23:01.152 2343-2608 /? E /看门狗:!@Sync 467 03-11 01:23:16.602 24016-24016 /? E / AndroidRuntime:FATAL EXCEPTION:main java.lang.RuntimeException:无法实例化活动ComponentInfo {com.example / com.example.MainActivity}:java.lang.ClassNotFoundException:未找到类“com.example.MainActivity”on android.app.ActivityThread上android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2349)的android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2219)上的路径:/data/app/com.example-1.apk .access $ 700(ActivityThread.java:159)在Android.os.Looper.loop的android.app.Handler.dispatchMessage(Handler.java:99)上的android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1316) (Looper.java:176)位于java.lang.reflect.Method.invoke(Method.java)java.lang.reflect.Method.invokeNative(Native Method)的android.app.ActivityThread.main(ActivityThread.java:5419) :525)at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:1046)at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)at dalvik.system.NativeS tart.main(Native Method)引起:java.lang.ClassNotFoundException:在路径上找不到类“com.example.MainActivity”:/ data / app / com.example-1.apk在dalvik.system.BaseDexClassLoader . findClass(BaseDexClassLoader.java:64)位于java.lang.ClassLoader.loadClass(ClassLoader.java:501)的java.lang.ClassLoader.loadClass(ClassLoader.java:461),位于android.app.Instrumentation.newActivity(Instrumentation.java) :1078)android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2210)在android.app.ActivityThread.access $ 700(ActivityThread.java:159)的android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2349) android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1316)在android.app.Handler.dispatchMessage(Handler.java:99)android.app.Looper.loop(Looper.java:176)android.app .ActivityThread.main(ActivityThread.java:5419)位于com.android.internal.os的java.lang.reflect.Method.invoke(Method.java:525)的java.lang.reflect.Method.invokeNative(Native Method) .Zyg oteInit $ MethodAndArgsCaller.run(ZygoteInit.java:1046)at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)at dalvik.system.NativeStart.main(Native Method)03-11 01:23: 17.052 2343-2441 /? E / android.os.Debug:!@ Rollstate> sdumpstate -k -t -z -d -o / data / log / dumpstate_app_error 03-11 01:23:23.087 2698-2698 /? E / Launcher:找不到设置时出错,找不到默认的可访问性:accessibility_enabled 03-11 01:23:23.147 2343-2441 /? E / ViewRootImpl:sendUserActionEvent()mView == null 03-11 01:23:23.162 2343-4810 /? E / EnterpriseContainerManager:ContainerPolicy服务还没有准备好!!! 03-11 01:23:23.377 24110-24132 /? E / Babel:canonicalizeMccMnc:无效mccmnc 03-11 01:23:23.377 24110-24132 /? E / Babel:canonicalizeMccMnc:无效mccmnc nullnull 03-11 01:23:31.152 2343-2608 /? E /看门狗:!@Sync 468
我的Android清单如下:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example">
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".MainActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
</manifest>
为什么不能找到主类?如何让该应用与Android 18兼容?
编辑1:我在MainActivity中尝试了addiong multidex功能:
public class MainActivity extends AppCompatActivity implements IResults {
@Override
protected void attachBaseContext(Context base) {
super.attachBaseContext(base);
MultiDex.install(this);
}
...
在gradle中:
apply plugin: 'com.android.application'
apply plugin: 'com.google.protobuf'
android {
compileSdkVersion 24
buildToolsVersion '25.0.0'
defaultConfig {
applicationId "com.example"
minSdkVersion 18
targetSdkVersion 24
versionCode 1
versionName "1.0"
// Enabling multidex support.
multiDexEnabled true
}
...
dependencies {
// Generic dependencies
compile fileTree(include: ['*.jar'], dir: 'libs')
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:24.2.0'
compile 'com.android.support:design:24.2.0'
// Support libraries
compile "com.android.support:appcompat-v7:$supportLibraryVersion"
compile "com.android.support:design:$supportLibraryVersion"
compile "com.android.support:cardview-v7:$supportLibraryVersion"
compile "com.android.support:recyclerview-v7:$supportLibraryVersion"
compile 'com.android.support:multidex:1.0.1'
...
但仍然没有运气 . 任何其他想法如何解决这个问题?
1 回答
你必须使用
MultidexApplication
或者
MultiDex.install(this);
在你的Application
课程中