Change the color of a seekbar on onProgressChanged

android, colors, seekbar

Solution

I do something like this using this method:

public void setProgressBarColor(ProgressBar progressBar, int newColor){ 
    LayerDrawable ld = (LayerDrawable) progressBar.getProgressDrawable();
    ClipDrawable d1 = (ClipDrawable) ld.findDrawableByLayerId(R.id.progressshape);
    d1.setColorFilter(newColor, PorterDuff.Mode.SRC_IN);

}

Then, when you update the progress, you just have to change the desired color.

Problem

I have custom seekbar and I can change the the color in the onProgressChanged by setting a new progress drawable: ``` seek.setProgressDrawable(res.getDrawable(R.drawable.seekbar_bg1)); ``` But I would like a seekbar which has a solid color from green to red depending on the progress. Is there a way to use something like a gradient color so I don't need to create like 100 drawables this? ``` <?xml version="1.0" encoding="utf-8"?> <layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item android:id="@android:id/background"> <shape> <solid android:color="@android:color/transparent" /> </shape> </item> <item android:id="@+id/progressshape"> <clip> <shape> <solid android:color="@color/custom_yellow" /> </shape> </clip> </item> </layer-list> ``` For those who are interested in the solution. I use the following code: this method to set the color: ``` public void setProgressBarColor(int newColor){ LayerDrawable ld = (LayerDrawable) getProgressDrawable(); ClipDrawable d1 = (ClipDrawable) ld.findDrawableByLayerId(R.id.progressshape); d1.setColorFilter(newColor, PorterDuff.Mode.SRC_IN); } ``` and in the onProgressChanged: ``` if(progress <= 50){ seek.setProgressBarColor(Color.rgb( 255 - (255/100 * (100 - progress*2)), 255, 0)); }else{ seek.setProgressBarColor(Color.rgb( 255, 255 - (255/100 * (progress - 50)*2), 0)); } ```

Original source