1. AppInventor
2. 4. Component Info
3. Chinese (Traditional)
4. translate

A FeatureCollection contains one or more map features as a group. Any events fired on a feature in the collection will also trigger the corresponding event on the collection object. FeatureCollections can be loaded from external resources as a means of populating a Map with content.

特徵集元件是由一或多個地圖特徵所組成的集合。其中任何一個特徵的事件被觸發的話，也會觸發其他特徵的對應事件。特徵集元件可由外部資源來載入，作為產生地圖與相關內容的媒介。

Non-visible component for storing and retrieving files. Use this component to write or read files on your device. The default behaviour is to write files to the private data directory associated with your App. The Companion is special cased to write files to a public directory for debugging. Use the More information link to read more about how the File component uses paths and scopes to manage access to files.

本元件屬於不可見元件，用於儲存及讀取檔案。本元件可用於讀寫裝置上的檔案。預設情況下，會將檔案寫入與該 App 的私有資料目錄中。在AI Companion中，為了便於除錯，將檔案寫在 /sdcard/AppInventor/data 資料夾內。如果檔案的路徑以 "/" 開始，代表該檔案路徑是在 /sdcard下，例如，將檔案寫入 /myFile.txt，完整路徑就是 /sdcard/myFile.txt。

The <code>FilePicker</code> component is a button-like component that when clicked by the user will prompt them to select a file from the system. The picker can also be programmatically opened by calling its <a href="/reference/components/media.html#FilePicker.Open" target="_blank">Open</a> method. Using the FilePicker requires Android 4.4 or higher or iOS 11 or higher.

<code>檔案選擇器</code>元件外型類似按鈕，點選之後會以彈出視窗讓使用者從系統中選擇一個檔案。1本元件也可藉由程式方法開啟，也就是呼叫自身的<a href="/reference/components/media.html#FilePicker.Open" target="_blank">開啟選取器</a>方法。本元件需要 Android 4.4 以上或 iOS 11 以上才能使用。

Non-visible component that communicates with Firebase to store and retrieve information.

本元件屬於不可見元件，您可運用支援 Firebase 的網路資料庫讓 App 使用者彼此共享資料。

<p>A non-visible component that communicates with Google Fusion Tables. Fusion Tables let you store, share, query and visualize data tables; this component lets you query, create, and modify these tables.</p> <p><font color=red><b>NOTE:</b>&nbsp;Google shutdown the Fusion Tables service on December 3, 2019. This component no longer functions.</font></p> <p>This component uses the <a href="https://developers.google.com/fusiontables/docs/v2/getting_started" target="_blank">Fusion Tables API V2.0</a>. <p>Applications using Fusion Tables must authentication to Google''s servers. There are two ways this can be done. The first way uses an API Key which you the developer obtain (see below). With this approach end-users must also login to access a Fusion Table. The second approach is to use a Service Account. With this approach you create credentials and a special "Service Account Email Address" which you obtain from the <a href="https://code.google.com/apis/console/" target="_blank">Google APIs Console</a>. You then tell the Fusion Table Control the name of the Service Account Email address and upload the secret key as an asset to your application and set the KeyFile property to point at this file. Finally you check the "UseServiceAuthentication" checkbox in the designer. When using a Service Account, end-users do not need to login to use Fusion Tables, your service account authenticates all access.</p> <p>To get an API key, follow these instructions.</p> <ol><li>Go to your <a href="https://code.google.com/apis/console/" target="_blank">Google APIs Console</a> and login if necessary.</li><li>Select the <i>Services</i> item from the menu on the left.</li><li>Choose the <i>Fusiontables</i> service from the list provided and turn it on.</li><li>Go back to the main menu and select the <i>API Access</i> item. </li></ol><p>Your API Key will be near the bottom of that pane in the section called "Simple API Access".You will have to provide that key as the value for the <i>ApiKey</i> property in your Fusiontables app.</p><p>Once you have an API key, set the value of the <i>Query</i> property to a valid Fusiontables SQL query and call <i>SendQuery</i> to execute the query. App Inventor will send the query to the Fusion Tables server and the <i>GotResult</i> block will fire when a result is returned from the server.Query results will be returned in CSV format, and can be converted to list format using the "list from csv table" or "list from csv row" blocks.</p><p>Note that you do not need to worry about UTF-encoding the query. But you do need to make sure the query follows the syntax described in <a href="https://developers.google.com/fusiontables/docs/v2/getting_started" target="_blank">the reference manual</a>, which means that things like capitalization for names of columns matters, and that single quotes must be used around column names if there are spaces in them.</p>

<p>Google Fusion Tables是一個網路服務，可用於儲存、分享、查詢並將資料表視覺化呈現。您可使用Google Chart API V1.0來建立、查詢、修改上述表格。</p><p>要使用該元件，首先需要定義一個查詢，然後呼叫發送查詢方法來執行查詢，當收到查詢結果時，會觸發收到結果事件，並回傳查詢結果。</p><p>請注意，您不必遵守UTF編碼，但查詢格式必須根據文件規定，這代表要特別注意諸如欄位名稱大寫這類的事情，此外，如果列名中間包含空格，則必須用單引號將列名括起來。</p><p>通常以逗號分隔值(CSV)的格式來回傳查詢結果，您可用App Inventor的list from csv table與list from csv row指令將結果轉為清單格式。</p>

<p>Non-visible component that can measure angular velocity in three dimensions in units of degrees per second.</p><p>In order to function, the component must have its <code>Enabled</code> property set to True, and the device must have a gyroscope sensor.</p>

<p>本元件是用於測量三軸角速度的不可見元件，單位為角度/秒。</p><p>本元件的<code>啟用</code>屬性須為"真"，且這台Android 裝置必須具備陀螺儀感測器才能取得資料。</p>

<p>A formatting element in which to place components that should be displayed from left to right. If you wish to have components displayed one over another, use <code>VerticalArrangement</code> instead.</p>

<p>本元件是用於畫面編排，可讓其中的元件自左向右水平排列。如果希望元件自上而下排列的話，請改用<code>垂直配置</code>元件。</p>

<p>A formatting element in which to place components that should be displayed from left to right. If you wish to have components displayed one over another, use <code>VerticalArrangement</code> instead.</p><p>This version is scrollable.

<p>本元件是用於畫面編排，可讓其中的元件自左向右水平排列。如果希望元件自上而下排列的話，請改用<code>垂直配置</code>元件。</p><p>本元件可左右捲動。

A sensor component that can measure the relative ambient air humidity. Most Android devices do not have this sensor.

用於測量環境中空氣相對濕度的感測器元件。注意：大多數 Android 裝置無此感測器。

The ImageBot is a non-visible component that uses DALL-E 2 to create and edit images. You must supply your own OpenAI API key for this component by setting its ApiKey property in the blocks.

生圖機器人屬於不可見元件，使用 DALL-E 2 生圖引擎來產生與編輯圖片。您需在本元件的"Api金鑰"屬性中填入自行申請的 OpenAI API 金鑰。