Question

使用Asm注入一个类all方法

这是我的代码：

转换api获取所有类

def cacheFile = new File(file.parent, file.name + ".cache");
fis = new FileInputStream(file)
fos = new FileOutputStream(cacheFile)
println "injectFile: ${file.path}"
byte[] bytes = hackClass(file, null, false, fis);
fos.write(bytes)

if (file.exists()) {
   file.delete()
 }
cacheFile.renameTo(file)

Asm方法访问者

  @Override
  public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
    MethodVisitor mv = null;

    if(name.equals("onCreate") || name.equals("onPause")){
        System.out.println(file.getName() + "Method name : " + name);
        mv = cv.visitMethod(access, name, desc, signature, exceptions);
        return new TraceMethodVisitor(name, mv);
    }

    if (cv != null){
        mv = cv.visitMethod(access, name, desc, signature, exceptions);
    }

    return mv;
}

MethodVisitor代码：

@Override
public void visitCode() {
    //add start
    mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
    mv.visitLdcInsn("========start=========");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false);

    mv.visitLdcInsn("Hi");
    mv.visitLdcInsn("hello world");
    mv.visitMethodInsn(INVOKEVIRTUAL, "android/util/Log", "v", "(Ljava/lang/String;Ljava/lang/String;)I", false);

    super.visitCode();
}

如果MethodVisitor只修改一个方法，则成功

修改两个或多个方法，失败，上面的代码修改了两个方法

以下是控制台的输出：

  :app:transformClassesWithDexForDebug
  Uncaught translation error: com.android.dx.cf.code.SimException:stack: overflow
  Uncaught translation error: com.android.dx.cf.code.SimException:stack: overflow

  2 errors; aborting
  :app:transformClassesWithDexForDebug FAILED

  FAILURE: Build failed with an exception.

  * What went wrong:
  Execution failed for task ':app:transformClassesWithDexForDebug'.

com.android.build.api.transform.TransformException：com.android.ide.common.process.ProcessException：java.util.concurrent.ExecutionException：com.android.ide.common.process.ProcessException：返回码1用于dex进程

如何解决此问题？：（

Answer 1

创建类com / bigocto / hacksourcecode / JavaInjectTest

public class JavaInjectTest {

  public static void test1(){
    //Do something what you want
  }
  public void test2(){
    System.out.println("I am test 2");
  }
}

修改MethodVisitor代码

 @Override
public void visitCode() {
    //add start

    this.visitMethodInsn(INVOKESTATIC, "com/bigocto/hacksourcecode/JavaInjectTest", "test1", "()V", false);

    super.visitCode();
}

问题得到了解决!!

Answer 2

我遇到类似错误的类似问题：

Execution failed for task ':app:transformClassesWithDexForDebug'.
> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: Return code 1 for dex process

在我的情况下，错误包括依赖Java 1.8字节码会导致构建失败，因为我的应用程序使用的是Java 1.7。

我提出了与库维护者相同的内容，并明确将以下行添加到库的模块级build.gradle修复了问题：

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_7
    targetCompatibility JavaVersion.VERSION_1_7
}

希望它有所帮助。

任务执行失败＆＃39;：app：transformClassesWithDexForDebug＆＃39;返回代码1用于dex进程

2 个答案: