Right to Left ProgressBar?

Question

Does anyone know how to make a View reversed, I have a horizontal ProgressBar and I want it to right to left instead of left to right

Answer 1

Make a subclass of the normal progress bar view and implement the onDraw method to rotate the cnavas before drawing it:

@Override
protected void onDraw(Canvas canvas) {
    canvas.save();
    canvas.rotate(180,<CenterX>,<CenterY>);
    super.onDraw(canvas);
    canvas.restore();
}

This should do the trick.

Answer 2

 public class inverseSeekBar extends ProgressBar {

public inverseSeekBar(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    // TODO Auto-generated constructor stub
}

public inverseSeekBar(Context context, AttributeSet attrs) {
    super(context, attrs);
    // TODO Auto-generated constructor stub
}

public inverseSeekBar(Context context) {
    super(context);
    // TODO Auto-generated constructor stub
}

@Override
protected synchronized void onDraw(Canvas canvas) {
    // TODO Auto-generated method stub
     canvas.save(); 

        //now we change the matrix
        //We need to rotate around the center of our text
        //Otherwise it rotates around the origin, and that's bad. 
        float py = this.getHeight()/2.0f;
        float px = this.getWidth()/2.0f;
        canvas.rotate(180, px, py); 

        //draw the text with the matrix applied. 
        super.onDraw(canvas); 

        //restore the old matrix. 
        canvas.restore(); 
}}
  <com.hlidskialf.android.widget.inverseSeekBar 

       style="?android:attr/progressBarStyleHorizontal"
    android:layout_width="200dip"
    android:layout_height="wrap_content"
    android:max="100"
    android:progress="50"
    android:secondaryProgress="75" 

/> 

mypackage: com.test.testProgressBar