Android类加载ClassLoader双亲委托机制详解

protected Class<?> loadClass(String name, boolean resolve)
        throws ClassNotFoundException
    {
            // First, check if the class has already been loaded
            // 检查class是否有被加载
            Class<?> c = findLoadedClass(name);
            if (c == null) {
                try {
                    if (parent != null) {
                        //如果parent不为null，则调用parent的loadClass进行加载
                        c = parent.loadClass(name, false);
                    } else {
                        //parent为null，则调用BootClassLoader进行加载
                        c = findBootstrapClassOrNull(name);
                    }
                } catch (ClassNotFoundException e) {
                    // ClassNotFoundException thrown if class not found
                    // from the non-null parent class loader
                }
                if (c == null) {
                    // If still not found, then invoke findClass in order
                    // to find the class. 
                    // 如果都找不到就自己查找
                    c = findClass(name);
                }
            }
            return c;
    }