To answer your question succinctly, no, the attention getter and the thesis are two separates parts usually found in the introduction of the essay. The attention getter is what interests the reader in the rest of the essay. It can be a quotation, an anecdote, an interesting fact. It should be a strong lead into what the subject of the essay is going to be. Af the end of the introductory paragraph, after relating the meaning and importance of your attention getter and tying it into your subject, the writer then states his claim, argument, or thesis whatever your instructor calls it. I prefer the claim sentence: You are telling the reader what you are going to writing about in your essay. For example, your claim/thesis might state: "Mastering the computer has become the most important task in education today." Your attention getter at the first of the paragraph would illustrate the importance of the computer to get the reader's attention.
The short answer here is NO.
A thesis is a statement that presents an essay's argument. The argument will include a topic and either a question to be answered, an opinion to be proven/argued, or a particular line of interest in the subject to be explored.
A thesis can be attention grabbing, but it is not the purpose of a thesis to grab attention. The purpose of the thesis is to state the intentions of the essay.
The formula I use is that the thesis sentence contains the subject (what you are going to write about) and an attitude (what your position is/what you are going to examine about the topic). Tied to this, I like to use a rhetorical device called the tricolon which is simply a group of three points/topics/whatever (three is a kind of "magic number for groupings) that you are going to use to illustrate your thesis sentence. This provides a kind of "roadmap" for the reader. When they have finished this combination (which can often be combined in one sentences) they know what you are writing about, how you feel about it, and how you are going to go about illustrating your thesis. It is often the last sentence in the paragraph if you use the earlier materials to setup the thesis; this is often a great way to create interest in your thesis. This tends to be the "attention getter" rather than the thesis sentence (which works in conjunction with it).
A thesis generally follows the attention getter and is a statement of what the author expects to show or prove in the rest of the essay. The thesis allows the reader to know what your major point is going to be before you begin to use specific information to prove it. It is a "proposition for consideration", a statement that "can be discussed and either proved or disproved". It generally comes at the end of the introductory paragraph can be placed at the end or even in the middle of the essay. If you are a beginning writer, you must be careful to make the thesis specific enough to be able to defend in your paper but not too long so it doesn't take a book to make your point.
The introductory paragraph makes a point. The rest of the essay must support that point. One sentence in the introduction must clearly state the topic. That sentence is called the thesis statement. the thesis statement is the most important sentence in the introduction. The thesis statement will usually be the last sentence of the introductory paragraph. Your first sentence in the introduction is your attention getter, not usually the thesis statement.
Your thesis is not an attention getter. The attention getter is often referred to as a "hook". Your thesis is the central argument of your paper.