# String Encoding and Decoding

### Introduction

This sample shows how to output strings in a specified format and obtain error messages corresponding to error codes. It also demonstrates string encoding and decoding. The sample app is as follows.

![](screenshots/device/image1.png)

### Functions

1. Output in a specified format: You can use the app to output a string in different formats.

2. Error code parsing: You can input an error code in the app to obtain the corresponding error message.

3. Text encoding and decoding: You can use the app to encode and decode strings.

### Required Permissions

N/A

### Usage

1. Touch **Output in specified format**. Your input is then displayed in different formats, such as integer, floating point number, and string.

2. Touch **Obtain error details**. The error message corresponding to the error code is displayed in the text box on each line.

3. Touch **Text encoder**. Your input is then encoded and displayed, together with the information about data reading and writing.

4. Touch **Text decoder**. The encoded text content is decoded, and the output displayed is the same as what you input.

### Constraints

1. This sample can only be run on standard-system devices.

2. This sample requires DevEco Studio 3.0 Beta4 (Build Version: 3.0.0.992, built on July 14, 2022) to compile and run.