我正在尝试构建我的 Android 项目,但在构建步骤中遇到了这个问题:
[INFO] UNEXPECTED TOP-LEVEL EXCEPTION:
[INFO] com.android.dex.util.ExceptionWithContext
[INFO] at com.android.dex.util.ExceptionWithContext.withContext(ExceptionWithContext.java:45)
[INFO] at com.android.dx.dex.cf.CfTranslator.processMethods(CfTranslator.java:369)
[INFO] at com.android.dx.dex.cf.CfTranslator.translate0(CfTranslator.java:137)
[INFO] at com.android.dx.dex.cf.CfTranslator.translate(CfTranslator.java:93)
[INFO] at com.android.dx.command.dexer.Main.processClass(Main.java:729)
[INFO] at com.android.dx.command.dexer.Main.processFileBytes(Main.java:673)
[INFO] at com.android.dx.command.dexer.Main.access$300(Main.java:82)
[INFO] at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:602)
[INFO] at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:170)
[INFO] at com.android.dx.cf.direct.ClassPathOpener.processDirectory(ClassPathOpener.java:229)
[INFO] at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:158)
[INFO] at com.android.dx.cf.direct.ClassPathOpener.processDirectory(ClassPathOpener.java:229)
[INFO] at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:158)
[INFO] at com.android.dx.cf.direct.ClassPathOpener.processDirectory(ClassPathOpener.java:229)
[INFO] at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:158)
[INFO] at com.android.dx.cf.direct.ClassPathOpener.processDirectory(ClassPathOpener.java:229)
[INFO] at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:158)
[INFO] at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:144)
[INFO] at com.android.dx.command.dexer.Main.processOne(Main.java:632)
[INFO] at com.android.dx.command.dexer.Main.processAllFiles(Main.java:510)
[INFO] at com.android.dx.command.dexer.Main.runMonoDex(Main.java:279)
[INFO] at com.android.dx.command.dexer.Main.run(Main.java:245)
[INFO] at com.android.dx.command.dexer.Main.main(Main.java:214)
[INFO] at com.android.dx.command.Main.main(Main.java:106)
[INFO] Caused by: java.lang.NullPointerException
[INFO] at com.android.dx.cf.code.ConcreteMethod.<init>(ConcreteMethod.java:87)
[INFO] at com.android.dx.cf.code.ConcreteMethod.<init>(ConcreteMethod.java:75)
[INFO] at com.android.dx.dex.cf.CfTranslator.processMethods(CfTranslator.java:271)
[INFO] ... 22 more
[INFO] ...while processing <init> (Lcom/glureau/dex_issue/MyClass;)V
[INFO] ...while processing com/glureau/dex_issue/MyClass$1.class
看起来它与嵌套类 + if 条件有关,其中值始终为 false :
public class MyClass {
public static final boolean DEBUG = false;
private class NestedClass {
}
public void updateButton(Button button) {
new NestedClass();
if (DEBUG) {
if (button != null) {
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(v.getContext(), "Test", Toast.LENGTH_SHORT).show();
}
});
}
}
}
}
我怀疑这是一个 dex 问题,因为新的 OnClickListener 创建了一个新的 NestedClass 来引用 MyClass 的实例,但同时,这部分代码在构建阶段被删除(因为 DEBUG=false)。
如果有人可以确认该问题或为此添加一些解释,谢谢。
Apache Maven 3.2.1(ea8b2b07643dbb1b84b6d16e1f08391b666bc1e9;2014-02-14T18:37:52 + 01:00)
Maven 主目录:C:\apache-maven-3.2.1\bin..
Java版本:1.7.0_71,供应商:Oracle Corporation
Java 主目录:C:\Program Files\Java\jdk1.7.0_71\jre
默认区域设置:fr_FR,平台编码:Cp1252
操作系统名称:“windows 7”,版本:“6.1”,架构:“amd64”,系列:“windows”
完整的 Maven 项目(2 类):http://www.filedropper.com/dexissue_1 http://www.filedropper.com/dexissue_1
PS:是的,我可以轻松更改代码以使其再次编译。例如,只需将新的 OnClickListener 移到 if 之外,但我很想了解为什么我的代码在 dex 过程中崩溃。