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How to open an account on an Android phone JavaScript

王林Original: 2023-05-12 17:30:07621browse

With the rapid development of mobile application development, JavaScript, as a popular programming language, has attracted more and more attention from developers. As the most popular mobile operating system in the world, Android phones have also received more and more attention as a platform for JavaScript development. So, how to develop and run JavaScript on Android phones? The following are some basic JavaScript methods and techniques for opening an account on Android phones for your reference.

1. Install Node.js
Node.js is an open source JavaScript running environment that runs on the server side. It can help us run JavaScript on Android phones. Before installing Node.js, you need to make sure that the Termux command line interface or other similar simulated terminal application is installed on your phone.

The steps to install Node.js are as follows:

Open the command line interface and enter the following command:
```
pkg install nodejs
```
Wait After the installation is complete, you can use the following command to verify whether Node.js is successfully installed:
```
node -v
```
If the current Node.js version number is output, the installation is successful.

2. Use Vim for JavaScript writing
Vim is a commonly used text editor that can run on Android phones and supports writing JavaScript language. When using Vim to write JavaScript, you need to save the code in the form of a .js file in any folder on your phone, for example, create a new test.js file in the /home/storage/js/ folder.

After opening the Vim editor, open the js file you just saved with the following command:

vim /home/storage/js/test.js

Then you can edit the JavaScript code in the Vim editor. After editing is completed, you can press the ESC key to exit the editing mode, then enter the following command to save the file and exit Vim:

:wq

3. Run JavaScript on the Android phone
After installing Node.js and editing After the JavaScript code file, we can run the JavaScript code on the Android phone through the following steps:

Open the command line interface and enter the following command to enter the folder where the JavaScript code is stored:
```
cd /home/storage/js/
```
Enter the following command to run the JavaScript code:
```
node test.js
```
where test.js is the file name of the JavaScript code you saved.

3. Use Webview to run JavaScript
In addition to using Node.js to run JavaScript on Android phones, you can also use Webview, which allows you to embed HTML in Android applications. and JavaScript code. The following are some basic methods of using Webview:

Add a Webview control in the layout file of the Android application and set its ID to "webview":

<WebView
 android:id="@+id/webview"
 android:layout_width="match_parent"
 android:layout_height="match_parent" />

Get the Webview control in your Java code and load an HTML file using the following code:
```
WebView myWebView = (WebView) findViewById(R.id.webview);
myWebView.loadUrl("file:///android_asset/sample.html");
```
Where sample.html is the file name of your HTML file and place it in the application under the assets folder.

Write JavaScript code in your HTML file and call the code when the page loads:

<!DOCTYPE html>
<html>
<head>
 <title>Sample HTML Page</title>
 <script type="text/javascript">
     function myFunction() {
         alert('Hello World!');
     }
 </script>
</head>
<body onload="myFunction()">
 <h1>Sample HTML Page</h1>
 <p>This is just a sample HTML page.</p>
</body>
</html>

where myFunction() is the name of your JavaScript code function.

4. Conclusion
The above are some basic JavaScript methods and techniques for opening an account on Android phones. I hope it can be helpful to everyone. Of course, this is just the beginning. You can also explore more JavaScript development technologies and methods suitable for Android phones through more learning and practice.

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Java JavaScript node.js html JS vim webview

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