Character Limits and Data Types

This page summarizes the character rules, size limits, and data types that apply to Android SDK tracking requests.

Use it as a reference when you define custom parameters or process user-generated input before sending it through the SDK.

General rules

• The SDK uses UTF-8 character encoding.

• Request content is case-sensitive.

• A single tracking request must not exceed 7 KB.

Supported parameter data types

Text parameters

• Maximum length: 255 characters per value.

• If you use multi-value parameters, each individual value can still contain up to 255 characters.

Figure parameters

• Supported format: decimal(12,2)

• Valid range: -9999999999.99 to 9999999999.99

Filtered characters and formatting

The SDK automatically normalizes or removes some characters during request processing.

• Characters in the range 0x00-0x1f are filtered out.

• Single quotes, double quotes, angle brackets, and backslashes are filtered out.

• 0xA0 is replaced with a space.

• Multiple spaces are reduced to a single space.

• Leading and trailing spaces are removed.

When to check this page

• Before defining custom text or figure parameters

• When sanitizing user input before tracking

• When debugging request truncation or unexpected value changes

Related: Default Parameters, Object Oriented Tracking