This ImageView centers the image horizontally. It behaves like gravity:top|center_horizontally if the bitmap is higher than the view, but if the view is higher than the bitmap it behaves like gravity:bottom|center_horizontally. Ideal for images that are positioned below a header text, but should'nt float above the footer.

CenterAtBottomImageView.java

public class CenterAtBottomImageView extends ImageView { 
 
    public CenterAtBottomImageView(Context context) { 
        super(context); 
    } 
 
    public CenterAtBottomImageView(Context context, AttributeSet attrs) { 
        super(context, attrs); 
    } 
 
    public CenterAtBottomImageView(Context context, AttributeSet attrs, int defStyleAttr) { 
        super(context, attrs, defStyleAttr); 
    } 
 
    @TargetApi(Build.VERSION_CODES.LOLLIPOP) 
    public CenterAtBottomImageView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { 
        super(context, attrs, defStyleAttr, defStyleRes); 
    } 
 
    @Override 
    protected void onDraw(Canvas canvas) { 
        if (getBackground() != null) { 
            getBackground().draw(canvas); 
        } 
        if (getDrawable() != null && getDrawable() instanceof BitmapDrawable) { 
            Bitmap bitmap = ((BitmapDrawable) getDrawable()).getBitmap(); 
            float top = Math.max(0, (getHeight()+getPaddingTop()+getPaddingBottom())-bitmap.getHeight()); 
            float left = Math.max(0, getWidth()*0.5f -(bitmap.getWidth()*0.5f)); 
            canvas.drawBitmap(bitmap, left, top, null); 
        } else { 
            super.onDraw(canvas); 
        } 
    } 
}