DrawableCenterEditText.java 文件源码

@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 -20, 0);
        }
    }
    super.onDraw(canvas);
}