Android上的Google地圖與斯卡拉

Question

我嘗試使用Scala，SBT和Google地圖製作Android應用程序。

plugins.scala：

import sbt._ 

class Plugins(info: ProjectInfo) extends PluginDefinition(info) { 
    val android = "org.scala-tools.sbt" % "sbt-android-plugin" % "0.5.1" 
} 

project.scala：

import sbt._ 

trait Defaults { 
    def androidPlatformName = "android-9" 
} 
class Parent(info: ProjectInfo) extends ParentProject(info) { 
    override def shouldCheckOutputDirectories = false 
    override def updateAction = task { None } 

    lazy val main = project(".", "AndMap", new MainProject(_)) 
    lazy val tests = project("tests", "tests", new TestProject(_), main) 

    class MainProject(info: ProjectInfo) extends AndroidProject(info) with Defaults with MarketPublish with TypedResources { 
    val keyalias = "someAlias" 
    val scalatest = "org.scalatest" % "scalatest" % "1.3" % "test" 

    override lazy val minSdkVersion = Some(9) 
    } 

    class TestProject(info: ProjectInfo) extends AndroidTestProject(info) with Defaults 
} 

Activity.scala：

package some.package 

import _root_.android.app.Activity._ 
import android.app._ 
import _root_.com.google.android.maps._ 
import _root_.android.os.Bundle 
import _root_.android.widget.TextView 

class MainActivity extends MapActivity { 
    override def onCreate(savedInstanceState: Bundle) { 
    super.onCreate(savedInstanceState) 
    setContentView(new TextView(this) { 
     setText("hello, world") 
    }) 
    //setContentView(R.layout.main) 
    } 

    def isRouteDisplayed: Boolean = false 
} 

當我嘗試編譯我得到的錯誤：「活動.scala：5：谷歌值不是包com的成員「。我發現的唯一解決方案是將文件「maps.jar」複製到我的lib目錄中。 現在編譯和deploing我的手機上工作正常，但是當我嘗試啓動它，我得到的錯誤：

I/ActivityManager( 151): Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=some.package/.MainActivity } from pid 8200 
I/ActivityManager( 151): Start proc some.package for activity some.package/.MainActivity: pid=9374 uid=10100 gids={3003} 
W/dalvikvm(9374): Class resolved by unexpected DEX: Lsome/package/MainActivity;(0x40513720):0x8ef40 ref [Lcom/google/android/maps/MapActivity;] Lcom/google/android/maps/MapActivity;(0x40513720):0x8ee88 
W/dalvikvm(9374): (Lmanufaktur/eins/MainActivity; had used a different Lcom/google/android/maps/MapActivity; during pre-verification) 
W/dalvikvm(9374): Unable to resolve superclass of Lsome/package/MainActivity; (18) 
W/dalvikvm(9374): Link of class 'Lsome/package/MainActivity;' failed 
D/AndroidRuntime(9374): Shutting down VM 
W/dalvikvm(9374): threadid=1: thread exiting with uncaught exception (group=0x40015560) 
E/AndroidRuntime(9374): FATAL EXCEPTION: main 
E/AndroidRuntime(9374): java.lang.IllegalAccessError: Class ref in pre-verified class resolved to unexpected implementation 
E/AndroidRuntime(9374): at dalvik.system.DexFile.defineClass(Native Method) 
E/AndroidRuntime(9374): at dalvik.system.DexFile.loadClassBinaryName(DexFile.java:207) 
E/AndroidRuntime(9374): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:200) 
E/AndroidRuntime(9374): at java.lang.ClassLoader.loadClass(ClassLoader.java:551) 
E/AndroidRuntime(9374): at java.lang.ClassLoader.loadClass(ClassLoader.java:511) 
E/AndroidRuntime(9374): at android.app.Instrumentation.newActivity(Instrumentation.java:1021) 
E/AndroidRuntime(9374): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1561) 
E/AndroidRuntime(9374): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 
E/AndroidRuntime(9374): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
E/AndroidRuntime(9374): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 
E/AndroidRuntime(9374): at android.os.Handler.dispatchMessage(Handler.java:99) 
E/AndroidRuntime(9374): at android.os.Looper.loop(Looper.java:123) 
E/AndroidRuntime(9374): at android.app.ActivityThread.main(ActivityThread.java:3683) 
E/AndroidRuntime(9374): at java.lang.reflect.Method.invokeNative(Native Method) 
E/AndroidRuntime(9374): at java.lang.reflect.Method.invoke(Method.java:507) 
E/AndroidRuntime(9374): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
E/AndroidRuntime(9374): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
E/AndroidRuntime(9374): at dalvik.system.NativeStart.main(Native Method) 
... 

如果我延長活動，而不是MapActivity一切工作正常。那麼我有錯誤的maps.jar？我在哪裏得到正確的maps.jar？

Answer 1

這是android-sbt插件中的一個錯誤。現在這個問題已經在Github上得到糾正，並且將在下一個版本