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我正在尝试在没有 ProGuard 步骤的情况下创建和测试一个用 Scala 编写的简单虚拟 Android 应用程序(useProguard := false)。


我已将 scala 库推送到/system/framework
/system/framework/scala-library-2.9.1.jar

和一个权限文件/system/etc/permissions
/system/etc/permissions/scala-library-2.9.1.xml


权限xml的内容:

<?xml version="1.0" encoding="utf-8"?>

<permissions>
    <library
        name="scala-library-2.9.1"
        file="/system/framework/scala-library-2.9.1.jar"
    />
</permissions>

这是我的MainActivity.scala

package com.google.summer

import _root_.android.app.Activity
import _root_.android.os.Bundle
import _root_.android.graphics.Typeface
import _root_.android.text.Html

class MainActivity extends Activity with TypedActivity {
    override def onCreate(bundle: Bundle) {
        super.onCreate(bundle)
        setContentView(R.layout.main)

        // my dummy code here

    }
}

这是我的AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.google.summer">

    <application
        android:icon="@drawable/android:star_big_on"
        android:label="@string/app_name"
        android:debuggable="true">

        <activity android:label="@string/app_name" android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>

        <uses-library android:name="scala-library-2.9.1" />
    </application>

    <uses-sdk android:minSdkVersion="10"/>
</manifest>

我设法在不使用 ProGuard 的情况下将它安装在我的设备上,但是,当我尝试运行它时,出现以下异常(使用 logcat 捕获):

dalvikvm   I  Zip is good, but no classes.dex inside, and no valid .odex file in the same directory
dalvikvm   I  Failed resolving Lcom/google/summer/TypedViewHolder; interface 48 'Lscala/ScalaObject;'
dalvikvm   W  Link of class 'Lcom/google/summer/TypedViewHolder;' failed
dalvikvm   I  Failed resolving Lcom/google/summer/TypedActivityHolder; interface 30 'Lcom/google/summer/TypedViewHolder;'
dalvikvm   W  Link of class 'Lcom/google/summer/TypedActivityHolder;' failed
dalvikvm   I  Failed resolving Lcom/google/summer/TypedActivity; interface 19 'Lcom/google/summer/TypedActivityHolder;'
dalvikvm   W  Link of class 'Lcom/google/summer/TypedActivity;' failed
dalvikvm   I  Failed resolving Lcom/google/summer/MainActivity; interface 18 'Lcom/google/summer/TypedActivity;'
dalvikvm   W  Link of class 'Lcom/google/summer/MainActivity;' failed


FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.google.summer/com.google.summer.MainActivity}: java.lang.ClassNotFoundException: com.google.summer.MainActivity in loader dalvik.system.PathClassLoader[/system/framework/scala-library-2.9.1.jar:/data/app/com.google.summer-1.apk]
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1680)
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1784)
     at android.app.ActivityThread.access$1500(ActivityThread.java:123)
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:939)
     at android.os.Handler.dispatchMessage(Handler.java:99)
     at android.os.Looper.loop(Looper.java:123)
     at android.app.ActivityThread.main(ActivityThread.java:3835)
     at java.lang.reflect.Method.invokeNative(Native Method)
     at java.lang.reflect.Method.invoke(Method.java:507)
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
     at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassNotFoundException: com.google.summer.MainActivity in loader dalvik.system.PathClassLoader[/system/framework/scala-library-2.9.1.jar:/data/app/com.google.summer-1.apk]
     at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
     at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1672)
     ... 11 more
  Force finishing activity com.google.summer/.MainActivity

有谁知道错误可能在哪里以及如何解决它?

先谢谢了

顺便说一句,可能是被推送的 scala 库有问题吗?
Logcat 说它找不到scala.ScalaObject,但它存在于我推送的 jar 中。

4

1 回答 1

2

您不能随意向设备添加新的外部库(即在应用程序之间共享的库)。您将需要在您创建的每个应用程序中包含 scala jar。

这可以通过创建一个带有 Scala 的自定义 rom 来完成,但是每个想要运行您的应用程序的人都需要该自定义 rom。不是很实用:)

于 2012-07-26T12:45:13.640 回答