編輯電子書 - 回調型intent

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			<td>欲取得某一個調用Activity後的回傳參數，可以利用Intent的回調型框架來完成。</td>
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			<td>Intent啟動端需調用startActivityForResult(intent,requestCode)，要求被Intent啟動的Activity需回調參數。</td>
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			<td>程式碼如下：</td>
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			<td>接收回傳資料的程式碼如下：</td>
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			<td>一般會將REQUESTCODE設定為常數。</td>
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			<td>回呼時再去檢查是否符合。</td>
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			<td>設定RESULTCODE時，利用常數RESULT_OK。</td>
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			<td>這樣回傳時，兩階段的檢查應該如下方程式碼才是正確。</td>
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