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Custom Keyboard Android App


KeyFlex is an innovative custom keyboard android app designed to enhance and personalize the typing experience on your device. With a focus on flexibility and user preference, KeyFlex allows users to tailor every aspect of their keyboard, from color schemes and fonts to individual key sounds. Dive into a world where your keyboard adapts to you.

How KeyFlex Works

The app replaces the system keyboard, providing a rich set of features that enable users to create a completely unique and personal keyboard layout. Here are some of the customization options available:

  • Color Customization: Choose from a wide palette of colors for the keyboard background and individual keys.
  • Font Selection: Pick different fonts for a distinctive look.
  • Sound Customization: Assign different sounds to keypresses for auditory feedback.
  • Responsive Design: Enjoy a fast and fluid typing experience tailored to your typing habits.

Key Features

  • Intuitive Design: User-friendly interface for easy customization.
  • Broad Compatibility: Works across all apps on your Android device.
  • Regular Updates: Continuously updated with new features and improvements.

Advantages of KeyFlex

  • Personalization: Reflects your style and preference in every text you type.
  • Versatility: Offers various customization options to create the ideal keyboard.
  • User-Centric: Designed with user experience as the top priority, ensuring a smooth and responsive interaction.


KeyFlex is more than just a keyboard app; it’s a statement of individuality and personal preference. By offering extensive customization features, it ensures that every interaction with your device is uniquely yours. Step into the future of typing with KeyFlex, where every keypress is an expression of yourself.

Sample Code

import android.inputmethodservice.InputMethodService;
import android.inputmethodservice.Keyboard;
import android.inputmethodservice.KeyboardView;
import android.view.View;
import android.view.inputmethod.InputConnection;

public class CustomKeyboardService extends InputMethodService implements KeyboardView.OnKeyboardActionListener {
    private KeyboardView kv;
    private Keyboard keyboard;

    public View onCreateInputView() {
        kv = (KeyboardView)getLayoutInflater().inflate(R.layout.keyboard, null);
        keyboard = new Keyboard(this, R.xml.keys_definition);
        return kv;

    public void onKey(int primaryCode, int[] keyCodes) {
        InputConnection ic = getCurrentInputConnection();
            case Keyboard.KEYCODE_DELETE:
                ic.deleteSurroundingText(1, 0);
            // Handle other keys...

    // Implement other required methods like onPress, onRelease, etc.
<?xml version="1.0" encoding="utf-8"?>
<Keyboard xmlns:android=""
    <!-- Define rows and keys here -->
<?xml version="1.0" encoding="utf-8"?>
<KeyboardView xmlns:android=""
    android:visibility="visible" />
<manifest xmlns:android=""

    <application ... >
                <action android:name="android.view.InputMethod" />
                android:resource="@xml/method" />
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