控制drawableLeft等的可见性

不能去掉红字部分，否则不显示drawable

mBottom = getResources().getDrawable(R.drawable.rcs_search_edittext);

mBottom.setBounds( 0, 0, mBottom.getMinimumWidth(),mBottom.getMinimumHeight());

mLeft = getResources().getDrawable(R.drawable.ic_actionbar_search_normal);

mLeft.setBounds( 0, 0, mLeft.getMinimumWidth(),mLeft.getMinimumHeight());

左可见：

mEditSearchText.setCompoundDrawables(mLeft,null,null,mBottom);

左不可见只需要设置null

mEditSearchText.setCompoundDrawables( null,null,null,mBottom);