App Inventor 2 Android應用開發(fā)實戰(zhàn)

目 錄
V
目 錄
01 App Inventor 2 介紹 ..................................................................................................... 1
1.1 App Inventor 2 的發(fā)展與沿革 .................................................................................... 2
1.2 App Inventor 2 的整體架構(gòu) ........................................................................................ 2
1.3 構(gòu)建App Inventor 2 的開發(fā)環(huán)境 ............................................................................... 4
1.3.1 申請Gmail 賬號 ............................................................................................................ 4
1.3.2 安裝App Inventor 2 組件 .............................................................................................. 6
1.3.3 安裝MIT AI2 Companion App...................................................................................... 7
1.4 App Inventor 2 項目操作接口 .................................................................................... 9
1.4.1 App Inventor 2 項目管理接口 ..................................................................................... 10
1.4.2 App Inventor 2 項目設計接口 ..................................................................................... 11
1.4.3 App Inventor 2 項目拼塊界面 ..................................................................................... 13
1.4.4 在仿真器中執(zhí)行 .......................................................................................................... 14
1.5 項目維護 ................................................................................................................... 15
1.5.1 儲存項目 ...................................................................................................................... 16
1.5.2 另存項目 ...................................................................................................................... 16
1.5.3 下載.apk 文件 .............................................................................................................. 17
02 認識常用組件與運算原則 ........................................................................................ 18
2.1 常用基本組件 ........................................................................................................... 19
2.2 拼塊功能與事件 ....................................................................................................... 23
2.3 基本運算原則 ........................................................................................................... 26
2.3.1 常量 .............................................................................................................................. 26
App Inventor 2 Android 應用開發(fā)實戰(zhàn)
VI
2.3.2 變量 .............................................................................................................................. 27
2.3.3 算術(shù)運算 ...................................................................................................................... 27
2.3.4 字符串運算 .................................................................................................................. 28
2.3.5 范例練習——求面積 .................................................................................................. 29
2.3.6 關(guān)系（比較）運算 ...................................................................................................... 30
2.3.7 邏輯運算 ...................................................................................................................... 31
2.3.8 范例練習——求面積（改良版） ............................................................................... 32
03 循環(huán)與列表 ..................................................................................................................... 34
3.1 條件判斷 ................................................................................................................... 35
3.1.1 單向 .............................................................................................................................. 35
3.1.2 雙向 .............................................................................................................................. 36
3.1.3 嵌套 .............................................................................................................................. 37
3.2 循環(huán) ........................................................................................................................... 39
3.2.1 For 循環(huán) ....................................................................................................................... 39
3.2.2 嵌套循環(huán) ...................................................................................................................... 40
3.2.3 while 循環(huán) .................................................................................................................... 42
3.3 列表Lists .................................................................................................................. 43
3.3.1 建立列表 ...................................................................................................................... 44
3.3.2 foreach 循環(huán) ................................................................................................................. 44
3.3.3 列表選擇器組件 .......................................................................................................... 45
3.3.4 管理列表 ...................................................................................................................... 48
3.4 樂透彩實戰(zhàn) ............................................................................................................... 49
04 自定義程序 ..................................................................................................................... 52
4.1 對話框組件 ............................................................................................................... 53
4.1.1 組件特性 ...................................................................................................................... 53
4.1.2 顯示信息 ...................................................................................................................... 54
4.1.3 交互式對話信息 .......................................................................................................... 55
4.2 內(nèi)置程序 ................................................................................................................... 58
目 錄
VII
4.2.1 文字 .............................................................................................................................. 58
4.2.2 算術(shù)運算 ...................................................................................................................... 59
4.2.3 隨機數(shù) .......................................................................................................................... 60
4.3 內(nèi)置程序?qū)崙?zhàn) ........................................................................................................... 60
4.3.1 大小寫轉(zhuǎn)換 .................................................................................................................. 61
4.3.2 電話號碼檢查 .............................................................................................................. 62
4.3.3 簡易抽簽功能 .............................................................................................................. 63
05 繪圖與多媒體應用 ...................................................................................................... 66
5.1 繪圖組件 ................................................................................................................... 67
5.2 多媒體元素 ..............................................................................................