效果图
源码ParcelDetector.java
ParcelDetector实现了JavaPsiScanner java文件检测接口
核心代码
@Nullable
@Override
public List<String> applicableSuperClasses() {
return Collections.singletonList(CLASS_PARCELABLE);
}
@Override
public void checkClass(@NonNull JavaContext context, @NonNull PsiClass declaration) {
if (declaration instanceof PsiAnonymousClass) {
// Anonymous classes aren't parcelable
return;
}
// Only applies to concrete classes
if (declaration.isInterface()) {
return;
}
if (declaration.hasModifierProperty(PsiModifier.ABSTRACT)) {
return;
}
// Parceling spans is handled in TextUtils#CHAR_SEQUENCE_CREATOR
if (context.getEvaluator().implementsInterface(declaration,
"android.text.ParcelableSpan", false)) {
return;
}
PsiField field = declaration.findFieldByName("CREATOR", true);
if (field == null) {
Location location = context.getNameLocation(declaration);
context.report(ISSUE, declaration, location,
"This class implements `Parcelable` but does not "
+ "provide a `CREATOR` field");
}
}
实现函数解析
-
applicableSuperClasses
这个方法用来返回你感兴趣的那些父类，所以这里android.os.Parcelable(SdkConstants.CLASS_PARCELABLE )，此方法配合以下方法使用
-
checkClass(JavaContext context,PsiClass declaration)
检测到父类为以上指定的类是会触发此方法
判断是不是注解类 declaration instanceof PsiAnonymousClass
判断是不是接口declaration.isInterface()
判断是不是抽象类declaration.hasModifierProperty(PsiModifier.ABSTRACT)
-
判断PsiClass是否实现指定接口
JavaEvaluator.implementsInterface(PsiClass cls,String interfaceName,boolean strict)- interfaceName 接口名称如：android.text.ParcelableSpan
- strict 不清楚（大多数代码都是false）
-
获取成员变量PsiClass.findFieldByName(String name, boolean checkBases)
- name 变量名
- 是否校验父类
