Icon Color Changer : Change Color of Icons

Extensions
,
1

Here is the simple extension to change the color of the icon.

Which works in icons with transparent icons & it changes the color of the non transparent part of the icon.

MIT App Inventor(1)
MIT App Inventor(1)1175×473 33.1 KB

Updated with latest version
Download : com.xt.iconcolorchanger.aix (3.9 KB)
Code :
IconColorChanger.java.txt (2.2 KB)

4 Likes
2

Unfortunately, you cannot set transparent colors. The image is therefore irreversibly covered by a color. It cannot be undone, even if you try to assign a new image. The image remains covered. You would have to reload the screen for this.

Apart from that, I can't really think of a reason why or for what this extension could be useful. Hiding an image or replacing it with another one is no problem anyway.

3 Likes
3

It was working good for my needs ,

Here is another version which make color change base on color matrix, works with transparent and remove color filter block

package com.xt.iconcolorchanger;

import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.widget.ImageView;

import com.google.appinventor.components.annotations.SimpleFunction;
import com.google.appinventor.components.runtime.AndroidNonvisibleComponent;
import com.google.appinventor.components.runtime.AndroidViewComponent;
import com.google.appinventor.components.runtime.ComponentContainer;

public class IconColorChanger extends AndroidNonvisibleComponent {
    public IconColorChanger(ComponentContainer container) {
        super(container.$form());
    }

    @SimpleFunction(description = "Applies a color filter to the icons")
    public void ApplyColorFilter(AndroidViewComponent imageComponent, int color) {
        if (imageComponent.getView() instanceof ImageView) {
            final ImageView imageView = (ImageView) imageComponent.getView();
            imageView.post(new Runnable() {
                @Override
                public void run() {
                    float alpha = ((color >> 24) & 0xff) / 255f;
                    float red = ((color >> 16) & 0xff) / 255f;
                    float green = ((color >> 8) & 0xff) / 255f;
                    float blue = (color & 0xff) / 255f;

                    float[] matrix = {
                        0, 0, 0, 0, red * 255,
                        0, 0, 0, 0, green * 255,
                        0, 0, 0, 0, blue * 255,
                        0, 0, 0, alpha, 0
                    };

                    ColorMatrixColorFilter colorFilter = new ColorMatrixColorFilter(new ColorMatrix(matrix));
                    imageView.setColorFilter(colorFilter);
                }
            });
        }
    }

    @SimpleFunction(description = "Removes the color filter from icon")
    public void RemoveColorFilter(AndroidViewComponent imageComponent) {
        if (imageComponent.getView() instanceof ImageView) {
            final ImageView imageView = (ImageView) imageComponent.getView();
            imageView.post(new Runnable() {
                @Override
                public void run() {
                    imageView.clearColorFilter();
                }
            });
        }
    }
}

com.xt.iconcolorchanger.aix (4.8 KB)

1 Like
4

Neither work for me in companion 2.71u, Android 13. If I set colour to Green, the image component just goes Green.

5

This only works with icons which has transparent background ,
Here is demo project
demo.aia (13.5 KB)

6
  1. You should have stated that in your first post
  2. This set the entire non transparent part of the image to the colour set
2 Likes
7

sure i will update

8

There are many apps on Play Store capable of changing any app's icon. Can we achieve the same with App Inventor to create white-label apps?