編輯電子書 - 何謂intent

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			<td>Intent又稱為意圖，是Android中非常重要的機制，串接大大小小來自四面八方的APP使其能相互傳遞與叫用。</td>
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			<td>事件與意圖也是常拿來比較的機制，其個別特性如下：</td>
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			<td>事件（Event）</td>
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			<td>處理者（Handler）觸發事件進行處理。</td>
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			<td>意圖（Intent）</td>
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			<td>Android會試著去解釋該意圖的目的，並讓每個意圖都有一個動作（Action），讓不同的動作去行動。</td>
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			<td>Intent在Activity活動方面可以任意在程式元件之間互動與傳遞訊息，形成一種包含著相互獨立的元件集合下的互聯系統。</td>
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			<td>Intent在Service服務與Broadcast廣播上可以用來註冊監聽特定的Intent意圖，例如：監聽來電Intent與SMS訊息Intent，最後做出相應的回應。</td>
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			<td>在調用指定上Intent可以分為二種，分別是：</td>
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			<td>所謂顯性指定是指該意圖發生時，明確指明要由哪一個Activity、Service或Broadcast來接手服務。</td>
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			<td>所謂隱性指定是指該意圖發生時不指明要由哪一個Activity、Service或Broadcast來接手，而是讓可以接手的Activity/Service都有機會來服務。</td>
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			<td>在行為上Intent可以分為二種，分別是：</td>
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