代码中设置drawableleft 改变，隐藏。

改变drawableleft

Drawable drawable= getResources().getDrawable(R.drawable.drawable);
/// 这一步必须要做,否则不会显示.
drawable.setBounds(0, 0, drawable.getMinimumWidth(), drawable.getMinimumHeight());
myTextview.setCompoundDrawables(drawable,null,null,null);


//隐藏Drawables
myTextview.setCompoundDrawables(null,null,null,null);