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README
Apache-2.0

CompileLib

软件架构

个人自用安卓运行时动态编译Java字节码库

缘由

以前有这么个需求是要动态变化按钮的点击事件

一想这不就一热更新的事情嘛,结果说尽量不能有文件,最好就一段代码字符串就能用

然后想起上学时用的某个可以在安卓设备上写安卓代码的APP后,掏了下,发现它内部是用的Sun和Eclipse的代码编译库。

卧槽?

不是JDK的JavaCompile不能在Dalvik虚拟机上用吗?

于是一知半解的掏了Eclipse的编译库来试了下。

不错,能用且好使,但是编译的速度稍微有点不大行。

因此打开了新世界,并找到了janino这个更轻量的库;

不错,能用且更好使,编译比JDT快不少,还不需要android.jar

至此,封装处理了下,这个库就完成了。

注意

  • Activity字符串代码编译报错,只能外部加载含有Activity的dex,AM预插入Activity信息后使用或者预埋代理Activity做强转(还是喜欢预埋,省得强转出问题)
  • Dialog字符串代码可以编译,且正常调用show显示
  • View.OnClickListener实现类字符串代码可以编译,且正常设置给控件使用
  • 可直接加载apk文件,并调用apk中dex的类,但是apk不易过于复杂、体积过大,DexClassLoader加载慢,阿里的hook库只能用于28以下的设备,就懒得弄了

其他还有什么代码编译不出暂时未知......

安装教程

Step 1. 添加仓库地址和配置

     //旧AndroidStudio版本
     //build.gradle
     allprojects {
         repositories {
            ...
              maven { url 'https://jitpack.io' }
         }
     }
     
     //新AndroidStudio版本
     //settings.gradle
     dependencyResolutionManagement {
          repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
          repositories {
            ...
             maven { url 'https://jitpack.io' }
          }
      }

Step 2. 添加依赖

a、克隆引入

直接下载源码引入model

b、远程仓库引入

     dependencies {
           implementation 'com.gitee.shadowless_lhq:compile-lib:Tag'
            
           implementation 'io.reactivex.rxjava2:rxjava:2.2.21'
           implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
           implementation 'com.github.liujingxing.rxlife:rxlife-rxjava2:2.2.2'
           implementation 'org.codehaus.janino:janino:3.1.6'
    }

使用说明

      DynamicCompiler compiler = DynamicCompiler
                .builder()
                //上下文
                .context(Context context)
                //生命周期监听
                .lifecycle(LifecycleOwner owner)
                //是否合并Dex(仅对使用compileJavaCode时有效)
                .isMergeDex(true)
                //是否打印编译日志
                .isGenerateCompileInfo(boolean isPrint)
                //编译的文件名
                //可以填入xx.class或者xx.dex或者xx.apk
                //内部会自动处理,如果使用compileDex,class文件名和填入的要一致,其他类型类推
                .fileName(String fileName)
                //输出dex文件的路径
                .dexFilePath(String dexFilePath)
                //需要加载的完整类名
                .invokeAbsoluteClsName(String className)
                .resultCallBack(new DynamicCompilerDex.ResultCallBack() {
                    @Override
                    public void getClass(Class<?> cls) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException, InstantiationException {
                         //获取到已加载的类
                    }

                    @Override
                    public void getCompileStatue(DynamicCompilerDex.Statue statue) {
                         //获取编译状态
                    }
                }).build();
      //编译字符串代码,获取dex中的class
      compiler.compileJavaCode(String code);
      //编译Java文件,获取dex中的class
      compiler.compileJavaCode(File code, String format);
      //删除输出Dex路径下的所有dex文件
      compiler.deleteAllDex();
      //删除输出Dex路径下的指定文件名的dex文件
      compiler.deleteDexFromName();
      //已有class文件,编译dex文件,并在已设置的结果回调接口获取dex中的class
      //classFile可以设置文件夹,编译多个class文件为一个dex
      compiler.compileDex(ResultCallBack callBack);
      //已有dex文件,加载dex文件并获取dex中的class
      compiler.loadDex(ResultCallBack callBack);
      //已有dex文件,合并且自动加载dex文件并获取dex中的class
      compiler.mergeDex(ResultCallBack callBack);
      //根据传入invokeAbsoluteClsName的类名获取已创建的dex的class
      ClassManager.INSTANCE.getInitCls(String className);
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