Android 手写EventBus，ButterKnife=动态代理+注解+反射

package com.ccccc.annotationcompile; import com.ccccc.zpannotations.Constants; import com.ccccc.zpannotations.ZpBindView; import com.ccccc.zpannotations.eventbus.AnnotationScanResultBean; import com.ccccc.zpannotations.eventbus.BindMethod; import com.google.auto.service.AutoService; import com.google.gson.Gson; import java.io.Writer; import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Set; import javax.annotation.processing.AbstractProcessor; import javax.annotation.processing.Filer; import javax.annotation.processing.ProcessingEnvironment; import javax.annotation.processing.Processor; import javax.annotation.processing.RoundEnvironment; import javax.lang.model.SourceVersion; import javax.lang.model.element.Element; import javax.lang.model.element.TypeElement; import javax.lang.model.element.VariableElement; import javax.lang.model.type.TypeMirror; import javax.tools.Diagnostic; import javax.tools.JavaFileObject; @AutoService(Processor.class) public class ZpAnnotationCompile extends AbstractProcessor { String TAG = "ZpAnnotationCompile"; //3.定义一个用来生成APT目录下面的文件的对象 Filer filer; @Override public synchronized void init(ProcessingEnvironment processingEnv) { super.init(processingEnv); print("init"); filer = processingEnv.getFiler(); } @Override public SourceVersion getSupportedSourceVersion() { return SourceVersion.latestSupported(); } @Override public Set<String> getSupportedAnnotationTypes() { Set<String> types = new HashSet<>(); types.add(ZpBindView.class.getCanonicalName()); types.add(BindMethod.class.getCanonicalName()); // types.add(Override.class.getCanonicalName()); return types; } @Override public boolean process(Set<? extends TypeElement> set, RoundEnvironment roundEnvironment) { print("process"); Set<? extends Element> elementsAnnotatedWith = roundEnvironment.getElementsAnnotatedWith(ZpBindView.class); Set<? extends Element> bindMethodSet = roundEnvironment.getElementsAnnotatedWith(BindMethod.class); parserBindMethod(bindMethodSet); // TypeElement//类 // ExecutableElement//方法 // VariableElement//属性 // 开始对elementsAnnotatedWith进行分类 Map<String, List<VariableElement>> map = new HashMap<>(); for (Element ele : elementsAnnotatedWith) { VariableElement variableElement = (VariableElement) ele; String activityName = variableElement.getEnclosingElement().getSimpleName().toString(); Class aClass = variableElement.getEnclosingElement().getClass(); print("activityName=" + activityName); print("aClass=" + aClass); List<VariableElement> variableElements = map.get(activityName); if (variableElements == null) { variableElements = new ArrayList<>(); map.put(activityName, variableElements); } variableElements.add(variableElement); } if (map.size() > 0) { Writer writer = null; Iterator<String> iterator = map.keySet().iterator(); while (iterator.hasNext()) { String activityName = iterator.next(); List<VariableElement> variableElements = map.get(activityName); //得到包名 TypeElement enclosingElement = (TypeElement) variableElements.get(0).getEnclosingElement(); String packageName = processingEnv.getElementUtils().getPackageOf(enclosingElement).toString(); try { JavaFileObject sourceFile = filer.createSourceFile(packageName + "." + activityName + Constants.BIND_VIEW_LAST_NAME); writer = sourceFile.openWriter(); // package com.example.dn_butterknife; writer.write("package " + packageName + ";\n"); // import com.example.dn_butterknife.IBinder; writer.write("import com.ccccc.zpannotations.IBinder;\n"); // public class MainActivity_ViewBinding implements IBinder< // com.example.dn_butterknife.MainActivity>{ writer.write("public class " + activityName + Constants.BIND_VIEW_LAST_NAME + " implements IBinder<" + packageName + "." + activityName + ">{\n"); // public void bind(com.example.dn_butterknife.MainActivity target) { writer.write(" @Override\n" + " public void bind(" + packageName + "." + activityName + " target){\n"); //target.tvText=(android.widget.TextView)target.findViewById(2131165325); for (VariableElement variableElement : variableElements) { //得到名字 String variableName = variableElement.getSimpleName().toString(); //得到ID int id = variableElement.getAnnotation(ZpBindView.class).value(); //得到类型 TypeMirror typeMirror = variableElement.asType(); writer.write(" target." + variableName + "=(" + typeMirror + ")target.findViewById(" + id + ");\n"); } writer.write(" }\n}"); } catch (Exception e) { e.printStackTrace(); } finally { if (writer != null) { try { writer.close(); } catch (Exception e) { e.printStackTrace(); } } } } } return false; } private void parserBindMethod(Set<? extends Element> bindMethodSet) { Map<String, List<AnnotationScanResultBean>> map = new HashMap<>(); Writer writer = null; String tempPackageName = ""; for (Element ele : bindMethodSet) { String activityName = ele.getEnclosingElement().getSimpleName().toString(); List<AnnotationScanResultBean> methodElements = map.get(activityName); if (methodElements == null) { methodElements = new ArrayList<>(); map.put(activityName, methodElements); } AnnotationScanResultBean bean = new AnnotationScanResultBean(); String packageName = processingEnv.getElementUtils().getPackageOf(ele).toString(); tempPackageName = packageName; String methodName = ele.getSimpleName().toString(); bean.setPackageName(packageName); bean.setActivityName(activityName); bean.setMethodName(methodName); BindMethod annotation = ele.getAnnotation(BindMethod.class); bean.setBindMethodEventKey(annotation.eventKey()); bean.setBindMethodthreadMode(annotation.threadMode()); methodElements.add(bean); // print("parserBindMethod ele methoName= " + ele.getSimpleName()); // print("parserBindMethod ele = " + ele.getEnclosingElement().getSimpleName().toString()); // print("parserBindMethod ele1 = " + ele.getAnnotation(BindMethod.class)); // print("parserBindMethod ele2 = " + ele.getAnnotation(BindMethod.class).eventKey()); // print("parserBindMethod ele3 = " + ele.getAnnotation(BindMethod.class).threadMode()); // print("parserBindMethod ele4 = " + ele.getClass().getName()); // // String packageName = processingEnv.getElementUtils().getPackageOf(ele).toString(); // print("parse