Q:

Translucent seekbar

I prefer if I could my the seekbar in my app looks Translucent, is this possible?
<SeekBar
            xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/seekBar1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_below="@+id/topBar"
            android:layout_marginTop="26dip"
            android:paddingLeft="10dip"
            android:paddingRight="10dip"
            android:paddingTop="10dip"
            android:max="100"
            android:background="@drawable/roundedcorner" >
        </SeekBar>

A:

Set the android:progressDrawable attribute to a custom layer-list drawable with translucent components. You can set the android:thumb property as well.
Here's a sample drawable xml from HoloEverywhere, you can reference that project for sample image assets, too:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:id="@android:id/background"
          android:drawable="@drawable/progress_bg_holo_dark" />

    <item android:id="@android:id/secondaryProgress">
        <scale android:scaleWidth="100%"
               android:drawable="@drawable/progress_secondary_holo_dark" />
    </item>

    <item android:id="@android:id/progress">
        <scale android:scaleWidth="100%"
               android:drawable="@drawable/progress_primary_holo_dark" />
    </item>

</layer-list>

Also - related question:
Custom Drawable for ProgressBar/ProgressDialog

