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Last updated on: 2026-10-01
Android Apps > Tools > KeyEvent Display
KeyEvent Display icon

KeyEvent Display

1.0.26
Alexandros Schillings
4.00
156 reviews
10,000+
Downloads
Free

Use this application to check/debug the keycodes of physical device buttons.

KeyEvent Display Screenshot 1 of 5
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Download from Google Play

Pros & Cons

  • Niche focus speeds debugging of hardware key events
  • Filters logcat and kernel logs to show relevant messages
  • Open-source with transparent code and no ads
  • Android TV support broadens device compatibility
  • Kernel log parsing requires root access
  • Keyword filters are hardcoded in arrays.xml and require recompile to modify
  • Permissions include READ_LOGS and storage access, which may raise privacy considerations

About KeyEvent Display

KeyEvent Display is a tools app developed by Alexandros Schillings.

Download Statistics

KeyEvent Display has been downloaded 36 thousand times. In the last 30 days, the app was downloaded 18 times.

User Ratings

KeyEvent Display is rated 4.00 out of 5 stars. The rating is based on 160 ratings.

App Information

KeyEvent Display is FREE to download. The APK download size is 1.83 MB. The latest version available is 1.0.26. The last update was on July 5, 2020.

Technical Requirements

KeyEvent Display requires Android 1.6+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since December 2010.

Description
Once, I was playing with a number of Chinese tablets and trying different ROMs on them as they are technically the same hardware (HSG X5A variants).

I've had some problems getting the hard buttons to work though, so I wrote this application to detect key events and print them out. It will print out the following:

KeyEvents: The KeyEvents as Android understands them (KeyUp, KeyDown, KeyLongPress, KeyMultiple)

LogCat: Any relevant messages in logcat. Its filtered based on keywords declared in arrays.xml

Kernel: Any relevant messages in the kernel log. Its filtered based on keywords declared in arrays.xml. Kernel log parsing needs root.

The three checkboxes at the top control what information will be displayed.

This is a personal debug tool, but I hope it will be of some use to someone else.

No Ads.

Notes
--------------
While the application is running, the only "hard" keys which should work is "Home" and power. All others will produce their keycodes.

The SU request is to read the kernel log, so I can check if any keyevents are thrown by the kernel.

The location of keylayout files in Android is /system/usr/keylayout.

Kernel log parsing needs root

Both logcat and kernel log monitoring will only display lines containing words from two arrays in arrays.xml (i.e. you need to recompile the app to change them at the moment)

Currently the filters are:

Logcat:
|-HwGPIOE->GPDA
|-keycode
|-keycharacter

Kernel:
|-HwGPIOE->GPDA
|-keycode
|-keycharacter

Permissions
--------------
READ_LOGS: Used to access the Logcat log.
WRITE_EXTERNAL_STORAGE: Used to write the exported data to the SD card.

This application is open source. The code can be found here: https://github.com/alt236/KeyEvent-Display---Android

Recent changes:
* v1.0.0: Redesign, added Android TV support.
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More data about KeyEvent Display

Price Free to download
Total downloads 36 thousand
Recent downloads 18
Rating 4.00 based on 160 ratings
Ranking Not ranked
Version 1.0.26
APK size 1.83 MB
Number of libraries 0
Designed for Android 1.6+
Suitable for Everyone
Ads NO ads

App Performance Report

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Google Play Rating history and histogram

Rating history
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100
14
0
0
34

Downloads over time

Downloads over time
Subscribe to see download velocity and history

KeyEvent Display has been downloaded 36 thousand times. Over the past 30 days, it has been downloaded 18 times.

Changelog of KeyEvent Display

Show changelog

Developer information for Alexandros Schillings

Alexandros Schillings

aschillings.dev@gmail.com

Website

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Comments on KeyEvent Display for Android

★★★★★ Mark Stevens · Nov 12, 2021
Saves me from having to write code to discover the key codes. Excellent !
★★★★☆ Oldarney · Jul 2, 2011
Would be great if it worked witm software keyboards, good app anyway.
★★★★★ alt236 · Mar 12, 2011
@Kathleen, The application exits when you press the home button on the device. If that doesn't happen to you email me, and I'll try to fix it.
★★★★☆ A Google User · Dec 16, 2011
Not bad! Author responded quickly to review comments and emails, too!
★☆☆☆☆ A Google User · Mar 9, 2011
Please add an exit/disable key capture button. Your app should never capture key events without a way to interrupt.

Google Play Rankings for KeyEvent Display

This app is not ranked

Technologies used by KeyEvent Display

3 permissions
Subscribe to see full permission and library details

Frequently asked questions about KeyEvent Display

Is KeyEvent Display free?

Yes. KeyEvent Display is free to download from Google Play.

Is KeyEvent Display still available?

Yes. KeyEvent Display is on Google Play, and the last update we saw was on July 5, 2020.

Does KeyEvent Display contain ads?

No. Google Play does not list KeyEvent Display as containing ads.

What Android version does KeyEvent Display require?

KeyEvent Display runs on Android 1.6 and higher.

How large is the KeyEvent Display APK?

The KeyEvent Display APK is 1.83 MB.

Is KeyEvent Display suitable for children?

Google Play rates the content of KeyEvent Display as suitable for everyone.

How many times has KeyEvent Display been downloaded?

Google Play lists 10,000+ downloads for KeyEvent Display.

How do people rate KeyEvent Display?

KeyEvent Display scores 4.00 out of 5 stars, from 156 ratings on Google Play.

Who made KeyEvent Display?

KeyEvent Display was developed by Alexandros Schillings. It is listed in the tools category on Google Play.

What are the best alternatives to KeyEvent Display?

People looking at KeyEvent Display also look at these tools apps: 3C Logs (root), Logcat Extreme, Logcat Extreme Pro, Logcat [NO ROOT], Logcat Reader Professional.

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