How to Convert Android Color Integers to Hex Strings?

Color Conversion from Integer to Hex in Android

In Android, it is common to handle colors as integers generated from android.graphics.Color. To transform these integers into human-readable hex strings following the format #RRGGBB, a specific conversion process is required.

Solution:

To convert an integer representing a color into its hex equivalent, follow these steps:

1. Create a mask to ensure only the Red, Green, and Blue (RGB) components are extracted: int mask = 0xFFFFFF.
2. Perform a bitwise AND operation to isolate the RGB values: int hexValue = (0xFFFFFF & intColor).

3. Use the String.format method to construct the hex string in the desired format:

   <code class="java">String hexColor = String.format("#%06X", hexValue);</code>

   • The #06X placeholder specifies that the hex value should be zero-padded to ensure a length of 6 characters.

Example:

Given an integer value of -16776961, the conversion would proceed as follows:

1. Bitwise AND: -16776961 & 0xFFFFFF = 16711680
2. Format: String.format("#X", 16711680)
3. Result: #0000FF

By applying these steps, you can successfully convert color integers to hex strings, enabling you to display them in a human-readable format in your Android applications.

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