Custom SeekBar Drawable Android

Question

I want to personalise the default Android seekbar to:

I read about nine patch image and created 6 png images. The first three are for the gray progress bar (progressDrawable), as shown below:

1. Right image

   

2. Center image

   

3. Left image

   

The result should be:

The blue images represent the progress and are as follows:

1. Right image

   

2. Center image

   

3. Left image

   

And the thumb is as follows:

My question is, how can I use nine patch image to generate the custom seekbar exactly as the first picture and how can I apply this to my seekbar?

Answer 1

I think it shouldn't be complex. You don't have to make 6 images to fulfill your needs. Just create 2 nine-patches for background, progress. And thumb.png. Here is your XML:

<SeekBar
  android:id="@+id/my_seekbar"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:progressDrawable="@drawable/seekbar_progress"
  android:thumb="@drawable/thumb">

in your seekbar_progress:

 <?xml version="1.0" encoding="utf-8"?>
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android" >

<item android:id="@android:id/background">
    <nine-patch android:src="@drawable/progressbar_bg" android:dither="true"/>
</item>
<item android:id="@android:id/progress">
    <clip xmlns:android="http://schemas.android.com/apk/res/android"
        android:clipOrientation="horizontal"
        android:gravity="left">
        <nine-patch android:src="@drawable/progressbar_status" android:dither="true"/>
    </clip>
 </item>
</layer-list>

Do remember that your thumb should have blank space on top when creating so it looks like you wanted. Hope this helps.

Answer 2

You can use a custom seekbar using Java code ... and add layer list as the drawables ... this piece of code will help you I hope.

1.LayerList drawable

<layer-list 
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item 
        android:id="@android:id/background">
        <nine-patch 
            android:src="@drawable/your_nine_patch_image"
            android:tileMode="repeat">
        </nine-patch>
    </item>
    <item 
        android:id="@android:id/progress">
        <layer-list 
            xmlns:android="http://schemas.android.com/apk/res/android" >
            <item>
                <clip >
                    <bitmap 
                        xmlns:android="http://schemas.android.com/apk/res/android"
                        android:src="@drawable/clipimage_for_progress"
                        android:tileMode="repeat"/>
                </clip>
            </item>
        </layer-list>
    </item>
</layer-list>

This will be your customSeekbar class and you can use this custom seekbar in your app

public class CustomSeekbar {
    public CustomSeekbar(Context context) {
        super(context);
        setCustomUI();
    }

    public CustomSeekbar(Context context, AttributeSet attrs) {
        super(context, attrs);
        setCustomUI();
    }

    public CustomSeekbar(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        setCustomUI();
    }

    void setCustomUI() {

        this.setProgressDrawable(getResources().getDrawable(
                R.drawable.yourBackground));
    }
}