app-inventor | 易学教程

Can I edit an app made by Google AppInventor with other programming environment?

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So I see that making an Android App with Google AppInventor is really easy comparing to make it manually using Android plugin for Eclipse. But since AppInventor abilities are limited, is there any way I could change any element of an app made by it with Eclipse or any other programming environment that allow me to change the code manually? As you may know, you cannot do so directly, since App Inventor code is converted into Scheme, then converted by the kawa compiler into Java byte code. It is never represented in Java. However, the team has released the component libraries open source, which

AppInventor: Import data from csv file into a list

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I am developing an android application..i want to import data from csv file into a list in appinventor..1 method is to upload that csv file online and then extract data from it..is there a way by which i can keep that csv file in sd card and get data from it? If I upload that csv file and then extract data from it, then what is the shortest and simplest way??Any examples?? Normally this is not possible with App Inventor, but there is a trick to read a text file from SD card: you can use App Inventor together with embedded HTML/JavaScript, see an example here: http://puravidaapps.com/read.php

Getting App Inventor 2 variable values in an HTML/Javascript file

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问题 I am setting up a simple map program for a user to see locations on an embedded Google map. I have the map working, but I was wondering if there is a way for the user to input coordinates in AI2 then have the map center there. Here is the HTML file I am using to display the map. <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="initial-scale=1.0, user-scalable=no" /> <style type="text/css"> html { height: 100% } body { height: 100%; margin: 0; padding: 0 }

Getting App Inventor 2 variable values in an HTML/Javascript file

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I am setting up a simple map program for a user to see locations on an embedded Google map. I have the map working, but I was wondering if there is a way for the user to input coordinates in AI2 then have the map center there. Here is the HTML file I am using to display the map. <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="initial-scale=1.0, user-scalable=no" /> <style type="text/css"> html { height: 100% } body { height: 100%; margin: 0; padding: 0 } #map_canvas { height: 100% } </style> <script type="text/javascript" src="https://maps.googleapis.com

App inventor 2: How to split at spaces

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问题 I have a small question. I want to split the text at the space. eg: "Hello World " should be "Hello" ,"World" I tried to use "\r" ,but it is no use. I don't know what can I do. Please help me. Thank you very much. I try 2 way to split the text. But the list length always 1. 回答1: You can use String.split() String yourString = "Hello World"; String[] result = yourString.split(" "); result[0]; //"Hello" result[1]; //"World" 回答2: what about using the split at spaces block? Divides the given text

Filter url JSON results using App Inventor 2

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问题 I'm trying to filter a JSON url results using App Inventor 2, following sample codes from here1 and here2, but I still cannot get it done right. I only get one result at a time. The JSON results are data in the form shown in the following figure: { "field1":"alphaNumeric1", "field2":"aNumber1", "field3":"DD/MM/YY", "field4":"HH/MM/SS", "field5":"https://", "field6":"aText", "field7":"aNumber2", "field8":"alphaNumeric2", "field9":"aNumber3", "field10":"alphaNumeric3" } The JSON url is

Filter url JSON results using App Inventor 2

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I'm trying to filter a JSON url results using App Inventor 2, following sample codes from here1 and here2 , but I still cannot get it done right. I only get one result at a time. The JSON results are data in the form shown in the following figure: { "field1":"alphaNumeric1", "field2":"aNumber1", "field3":"DD/MM/YY", "field4":"HH/MM/SS", "field5":"https://", "field6":"aText", "field7":"aNumber2", "field8":"alphaNumeric2", "field9":"aNumber3", "field10":"alphaNumeric3" } The JSON url is constantly updated, so are the results, but this is not a problem for now. I can get it read by a timer. The

app-inventor: install apps onto SD card

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问题 [edited to show current state of play a week after asking the question] I delved into app inventor because my kids (age 10 and 12) are about to get their first android phones, and have done some drag and drop programming (game maker) so I thought it might be a good entry point for them. I have now written 5 apps myself with app inventor, and installed 4 onto my phone, and I can't install the 5th one because I am "out of memory" apparently, despite having 3 gigs free on the SD card on the

XML-RPC HTTP request with App Inventor?

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I am trying to build out an app that will communicate with Tapatalks API, it uses XML-RPC HTTP requests, I can do post/get requests with the web component. I cannot find anything on modifying the web component/Blocks to create said XML-RPC encoding. Any resources? Tips of what to search, or insight would be appreciated. This is the API php code I am trying to interact with https://github.com/tapatalk/tapatalk-phpbb3/blob/master/root/mobiquo/function/login.php Here is my app blocks currently and I am getting a code 200 Here is my blocks editor : http://imgur.com/uEyOb8i What you tried looks

Tips to shift from App Inventor to Eclipse

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问题 I am very good with AppInventor to build Android apps. I have good knowledge of C++ and little knowledge of Java and GUI building in Java. Suggest me how should I shift from App Inventor to Eclipse to build Android apps? Which path should I follow? Is building in Eclipse similar to building in AppInventor like defining different components and then handling their events? Or is it much more than that? Please guide me. 回答1: There is also the AppInventor to Java Bridge project at java