/**
 * drawableLeft与文本一起居中显示
 * 
 * @author 农民伯伯
 * @see http://www.cnblogs.com/over140/p/3464348.html
 * 
 */
public class DrawableCenterTextView extends TextView {

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

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

    public DrawableCenterTextView(Context context) {
        super(context);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        Drawable[] drawables = getCompoundDrawables();
        if (drawables != null) {
            Drawable drawableLeft = drawables[0];
            if (drawableLeft != null) {
                float textWidth = getPaint().measureText(getText().toString());
                int drawablePadding = getCompoundDrawablePadding();
                int drawableWidth = 0;
                drawableWidth = drawableLeft.getIntrinsicWidth();
                float bodyWidth = textWidth + drawableWidth + drawablePadding;
                canvas.translate((getWidth() - bodyWidth) / 2, 0);
            }
        }
        super.onDraw(canvas);
    }
}

drawableRigh 居中代码实现

public class DrawableCenterButton extends Button {

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

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

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


@Override
protected void onDraw(Canvas canvas) {
Drawable[] drawables = getCompoundDrawables();
if (drawables != null) {
Drawable drawableLeft = drawables[2];
if (drawableLeft != null) {

float textWidth = getPaint().measureText(getText().toString());
int drawablePadding = getCompoundDrawablePadding();
int drawableWidth = 0;
drawableWidth = drawableLeft.getIntrinsicWidth();
float bodyWidth = textWidth + drawableWidth + drawablePadding;
setPadding(0, 0, (int)(getWidth() - bodyWidth), 0);
canvas.translate((getWidth() - bodyWidth) / 2, 0);
}
}
super.onDraw(canvas);
}

}